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mariadb-columnstore-engine/writeengine/shared/we_fileop.cpp

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/* Copyright (C) 2014 InfiniDB, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; version 2 of
the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301, USA. */
// $Id: we_fileop.cpp 4737 2013-08-14 20:45:46Z bwilkinson $
#include "config.h"
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <sstream>
#include <iostream>
#include <memory>
#include <string>
#include <stdexcept>
#if defined(__FreeBSD__)
#include <sys/param.h>
#include <sys/mount.h>
#elif !defined(_MSC_VER)
#include <sys/vfs.h>
#endif
#include <boost/filesystem/operations.hpp>
#include <boost/filesystem/path.hpp>
#include <boost/scoped_array.hpp>
using namespace std;
#include "we_fileop.h"
#include "we_convertor.h"
#include "we_log.h"
#include "we_config.h"
#include "we_stats.h"
#include "we_simplesyslog.h"
#include "idbcompress.h"
using namespace compress;
#include "messagelog.h"
using namespace logging;
#include "IDBDataFile.h"
#include "IDBFileSystem.h"
#include "IDBPolicy.h"
using namespace idbdatafile;
namespace WriteEngine
{
/*static*/ boost::mutex FileOp::m_createDbRootMutexes;
/*static*/ boost::mutex FileOp::m_mkdirMutex;
/*static*/ std::map<int, boost::mutex*> FileOp::m_DbRootAddExtentMutexes;
// in 1 call to fwrite(), during initialization
//StopWatch timer;
/**
* Constructor
*/
FileOp::FileOp(bool doAlloc) : m_compressionType(0),
m_transId((TxnID)INVALID_NUM), m_buffer(0)
{
if (doAlloc)
{
m_buffer = new char[DEFAULT_BUFSIZ];
memset(m_buffer, '\0', DEFAULT_BUFSIZ);
}
}
/**
* Default Destructor
*/
FileOp::~FileOp()
{
if (m_buffer)
{
delete [] m_buffer;
}
m_buffer = 0;
}
/***********************************************************
* DESCRIPTION:
* Close a file
* PARAMETERS:
* pFile - file handle
* RETURN:
* none
***********************************************************/
void FileOp::closeFile( IDBDataFile* pFile ) const
{
delete pFile;
}
/***********************************************************
* DESCRIPTION:
* Create directory
* Function uses mutex lock to prevent thread contention trying to create
* 2 subdirectories in the same directory at the same time.
* PARAMETERS:
* dirName - directory name
* mode - create mode
* RETURN:
* NO_ERROR if success, otherwise if fail
***********************************************************/
int FileOp::createDir( const char* dirName, mode_t mode ) const
{
boost::mutex::scoped_lock lk(m_mkdirMutex);
int rc = IDBPolicy::mkdir( dirName );
if ( rc != 0 )
{
int errRc = errno;
if (errRc == EEXIST)
return NO_ERROR; // ignore "File exists" error
if ( getLogger() )
{
std::ostringstream oss;
std::string errnoMsg;
Convertor::mapErrnoToString(errRc, errnoMsg);
oss << "Error creating directory " << dirName << "; err-" <<
errRc << "; " << errnoMsg;
getLogger()->logMsg( oss.str(), ERR_DIR_CREATE, MSGLVL_ERROR );
}
return ERR_DIR_CREATE;
}
return NO_ERROR;
}
/***********************************************************
* DESCRIPTION:
* Create the "first" segment file for a column with a fixed file size
* Note: the file is created in binary mode
* PARAMETERS:
* fileName - file name with complete path
* numOfBlock - the total number of blocks to be initialized (written out)
* compressionType - Compression Type
* emptyVal - empty value used to initialize column values
* width - width of column in bytes
* dbRoot - DBRoot of column file we are creating
* RETURN:
* NO_ERROR if success
* ERR_FILE_EXIST if file exists
* ERR_FILE_CREATE if can not create the file
***********************************************************/
int FileOp::createFile( const char* fileName, int numOfBlock,
uint64_t emptyVal, int width,
uint16_t dbRoot )
{
IDBDataFile* pFile =
IDBDataFile::open(
IDBPolicy::getType( fileName, IDBPolicy::WRITEENG ),
fileName,
"w+b",
IDBDataFile::USE_VBUF,
width);
int rc = 0;
if ( pFile != NULL )
{
// Initialize the contents of the extent.
if (m_compressionType)
{
rc = initAbbrevCompColumnExtent( pFile,
dbRoot,
numOfBlock,
emptyVal,
width );
}
else
{
rc = initColumnExtent( pFile,
dbRoot,
numOfBlock,
emptyVal,
width,
true, // new file
false, // don't expand; add new extent
true ); // add abbreviated extent
}
closeFile( pFile );
}
else
return ERR_FILE_CREATE;
return rc;
}
/***********************************************************
* DESCRIPTION:
* Create the "first" segment file for a column with a fixed file size
* Note: the file is created in binary mode
* PARAMETERS:
* fid - OID of the column file to be created
* allocSize (out) - number of blocks allocated to the first extent
* dbRoot - DBRoot where file is to be located
* partition- Starting partition number for segment file path
* compressionType - Compression type
* colDataType - the column data type
* emptyVal - designated "empty" value for this OID
* width - width of column in bytes
* RETURN:
* NO_ERROR if success
* ERR_FILE_EXIST if file exists
* ERR_FILE_CREATE if can not create the file
***********************************************************/
int FileOp::createFile(FID fid,
int& allocSize,
uint16_t dbRoot,
uint32_t partition,
execplan::CalpontSystemCatalog::ColDataType colDataType,
uint64_t emptyVal,
int width)
{
//std::cout << "Creating file oid: " << fid <<
// "; compress: " << m_compressionType << std::endl;
char fileName[FILE_NAME_SIZE];
int rc;
uint16_t segment = 0; // should always be 0 when starting a new column
RETURN_ON_ERROR( ( rc = oid2FileName( fid, fileName, true,
dbRoot, partition, segment ) ) );
//@Bug 3196
if ( exists( fileName ) )
return ERR_FILE_EXIST;
// allocatColExtent() treats dbRoot and partition as in/out
// arguments, so we need to pass in a non-const variable.
uint16_t dbRootx = dbRoot;
uint32_t partitionx = partition;
// Since we are creating a new column OID, we know partition
// and segment are 0, so we ignore their output values.
//timer.start( "allocateColExtent" );
BRM::LBID_t startLbid;
uint32_t startBlock;
RETURN_ON_ERROR( BRMWrapper::getInstance()->allocateColExtentExactFile(
(const OID)fid, (uint32_t)width, dbRootx, partitionx, segment, colDataType,
startLbid, allocSize, startBlock) );
// We allocate a full extent from BRM, but only write an abbreviated 256K
// rows to disk for 1st extent, to conserve disk usage for small tables.
// One exception here is if we have rolled off partition 0, and we are
// adding a column to an existing table, then we are adding a column
// whose first partition is not 0. In this case, we know we are not
// dealing with a small table, so we init a full extent for 1st extent.
int totalSize = 0;
if (partition == 0)
totalSize = (INITIAL_EXTENT_ROWS_TO_DISK / BYTE_PER_BLOCK) * width;
else
totalSize = allocSize; // full extent if starting partition > 0
// Note we can't pass full file name to isDiskSpaceAvail() because the
// file does not exist yet, but passing DBRoot directory should suffice.
if ( !isDiskSpaceAvail(Config::getDBRootByNum(dbRoot), totalSize) )
{
return ERR_FILE_DISK_SPACE;
}
//timer.stop( "allocateColExtent" );
return createFile( fileName, totalSize, emptyVal, width, dbRoot );
}
/***********************************************************
* DESCRIPTION:
* Delete a file
* PARAMETERS:
* fileName - file name with complete path
* RETURN:
* NO_ERROR if success
* ERR_FILE_NOT_EXIST if file does not exist
* ERR_FILE_DELETE if can not delete a file
***********************************************************/
int FileOp::deleteFile( const char* fileName ) const
{
if ( !exists( fileName ) )
return ERR_FILE_NOT_EXIST;
return ( IDBPolicy::remove( fileName ) == -1 ) ? ERR_FILE_DELETE : NO_ERROR;
}
/***********************************************************
* DESCRIPTION:
* Deletes all the segment or dictionary store files associated with the
* specified fid.
* PARAMETERS:
* fid - OID of the column being deleted.
* RETURN:
* NO_ERROR if success
* ERR_DM_CONVERT_OID if error occurs converting OID to file name
***********************************************************/
int FileOp::deleteFile( FID fid ) const
{
char tempFileName[FILE_NAME_SIZE];
char oidDirName [FILE_NAME_SIZE];
char dbDir [MAX_DB_DIR_LEVEL][MAX_DB_DIR_NAME_SIZE];
RETURN_ON_ERROR((Convertor::oid2FileName(
fid, tempFileName, dbDir, 0, 0)));
sprintf(oidDirName, "%s/%s/%s/%s",
dbDir[0], dbDir[1], dbDir[2], dbDir[3]);
//std::cout << "Deleting files for OID " << fid <<
// "; dirpath: " << oidDirName << std::endl;
//need check return code.
RETURN_ON_ERROR(BRMWrapper::getInstance()->deleteOid(fid));
std::vector<std::string> dbRootPathList;
Config::getDBRootPathList( dbRootPathList );
int rc;
for (unsigned i = 0; i < dbRootPathList.size(); i++)
{
char rootOidDirName[FILE_NAME_SIZE];
rc = snprintf(rootOidDirName, FILE_NAME_SIZE, "%s/%s",
dbRootPathList[i].c_str(), oidDirName);
if ( rc == FILE_NAME_SIZE || IDBPolicy::remove( rootOidDirName ) != 0 )
{
ostringstream oss;
oss << "Unable to remove " << rootOidDirName;
throw std::runtime_error( oss.str() );
}
}
return NO_ERROR;
}
/***********************************************************
* DESCRIPTION:
* Deletes all the segment or dictionary store files associated with the
* specified fid.
* PARAMETERS:
* fid - OIDs of the column/dictionary being deleted.
* RETURN:
* NO_ERROR if success
* ERR_DM_CONVERT_OID if error occurs converting OID to file name
***********************************************************/
int FileOp::deleteFiles( const std::vector<int32_t>& fids ) const
{
char tempFileName[FILE_NAME_SIZE];
char oidDirName [FILE_NAME_SIZE];
char dbDir [MAX_DB_DIR_LEVEL][MAX_DB_DIR_NAME_SIZE];
std::vector<std::string> dbRootPathList;
Config::getDBRootPathList( dbRootPathList );
int rc;
for ( unsigned n = 0; n < fids.size(); n++ )
{
RETURN_ON_ERROR((Convertor::oid2FileName(
fids[n], tempFileName, dbDir, 0, 0)));
sprintf(oidDirName, "%s/%s/%s/%s",
dbDir[0], dbDir[1], dbDir[2], dbDir[3]);
//std::cout << "Deleting files for OID " << fid <<
// "; dirpath: " << oidDirName << std::endl;
for (unsigned i = 0; i < dbRootPathList.size(); i++)
{
char rootOidDirName[FILE_NAME_SIZE];
rc = snprintf(rootOidDirName, FILE_NAME_SIZE, "%s/%s", dbRootPathList[i].c_str(),
oidDirName);
if ( rc == FILE_NAME_SIZE || IDBPolicy::remove( rootOidDirName ) != 0 )
{
ostringstream oss;
oss << "Unable to remove " << rootOidDirName;
throw std::runtime_error( oss.str() );
}
}
}
return NO_ERROR;
}
/***********************************************************
* DESCRIPTION:
* Deletes all the segment or dictionary store files associated with the
* specified fid and partition.
* PARAMETERS:
* fids - OIDs of the column/dictionary being deleted.
* partition - the partition number
* RETURN:
* NO_ERROR if success
* ERR_DM_CONVERT_OID if error occurs converting OID to file name
***********************************************************/
int FileOp::deletePartitions( const std::vector<OID>& fids,
const std::vector<BRM::PartitionInfo>& partitions ) const
{
char tempFileName[FILE_NAME_SIZE];
char oidDirName [FILE_NAME_SIZE];
char dbDir [MAX_DB_DIR_LEVEL][MAX_DB_DIR_NAME_SIZE];
char rootOidDirName[FILE_NAME_SIZE];
char partitionDirName[FILE_NAME_SIZE];
int rcd, rcp;
for (uint32_t i = 0; i < partitions.size(); i++)
{
RETURN_ON_ERROR((Convertor::oid2FileName(
partitions[i].oid, tempFileName, dbDir,
partitions[i].lp.pp, partitions[i].lp.seg)));
sprintf(oidDirName, "%s/%s/%s/%s/%s",
dbDir[0], dbDir[1], dbDir[2], dbDir[3], dbDir[4]);
// config expects dbroot starting from 0
std::string rt( Config::getDBRootByNum(partitions[i].lp.dbroot) );
rcd = snprintf(rootOidDirName, FILE_NAME_SIZE, "%s/%s",
rt.c_str(), tempFileName);
rcp = snprintf(partitionDirName, FILE_NAME_SIZE, "%s/%s",
rt.c_str(), oidDirName);
if ( rcd == FILE_NAME_SIZE || rcp == FILE_NAME_SIZE
|| IDBPolicy::remove( rootOidDirName ) != 0 )
{
ostringstream oss;
oss << "Unable to remove " << rootOidDirName;
throw std::runtime_error( oss.str() );
}
list<string> dircontents;
if ( IDBPolicy::listDirectory( partitionDirName, dircontents ) == 0 )
{
// the directory exists, now check if empty
if ( dircontents.size() == 0 )
{
// empty directory
if ( IDBPolicy::remove( partitionDirName ) != 0 )
{
ostringstream oss;
oss << "Unable to remove " << rootOidDirName;
throw std::runtime_error( oss.str() );
}
}
}
}
return NO_ERROR;
}
/***********************************************************
* DESCRIPTION:
* Deletes the specified db segment file.
* PARAMETERS:
* fid - column OID of file to be deleted.
* dbRoot - DBRoot associated with segment file
* partition - partition number of associated segment file
* segment - segment number of associated segment file
* RETURN:
* NO_ERROR if success
***********************************************************/
int FileOp::deleteFile( FID fid, uint16_t dbRoot,
uint32_t partition, uint16_t segment ) const
{
char fileName[FILE_NAME_SIZE];
RETURN_ON_ERROR( getFileName( fid, fileName,
dbRoot, partition, segment) );
return ( deleteFile( fileName ) );
}
/***********************************************************
* DESCRIPTION:
* Check whether a file exists or not
* PARAMETERS:
* fileName - file name with complete path
* RETURN:
* true if exists, false otherwise
***********************************************************/
bool FileOp::exists( const char* fileName ) const
{
return IDBPolicy::exists( fileName );
}
/***********************************************************
* DESCRIPTION:
* Check whether a file exists or not
* PARAMETERS:
* fid - OID of file to be checked
* dbRoot - DBRoot associated with segment file
* partition - partition number of associated segment file
* segment - segment number of associated segment file
* RETURN:
* true if exists, false otherwise
***********************************************************/
bool FileOp::exists( FID fid, uint16_t dbRoot,
uint32_t partition, uint16_t segment ) const
{
char fileName[FILE_NAME_SIZE];
if (getFileName(fid, fileName, dbRoot, partition,
segment) != NO_ERROR)
return false;
return exists( fileName );
}
/***********************************************************
* DESCRIPTION:
* Check whether an OID directory exists or not
* PARAMETERS:
* fid - column or dictionary store OID
* RETURN:
* true if exists, false otherwise
***********************************************************/
bool FileOp::existsOIDDir( FID fid ) const
{
char fileName[FILE_NAME_SIZE];
if (oid2DirName( fid, fileName ) != NO_ERROR)
{
return false;
}
return exists( fileName );
}
/***********************************************************
* DESCRIPTION:
* Adds an extent to the specified column OID and DBRoot.
* Function uses ExtentMap to add the extent and determine which
* specific column segment file the extent is to be added to. If
* the applicable column segment file does not exist, it is created.
* If this is the very first file for the specified DBRoot, then the
* partition and segment number must be specified, else the selected
* partition and segment numbers are returned. This method tries to
* optimize full extents creation skiping disk space
* preallocation(if activated).
* PARAMETERS:
* oid - OID of the column to be extended
* emptyVal - Empty value to be used for oid
* width - Width of the column (in bytes)
* hwm - The HWM (or fbo) of the column segment file where the new
* extent begins.
* startLbid - The starting LBID for the new extent
* allocSize - Number of blocks allocated to the extent.
* dbRoot - The DBRoot of the file with the new extent.
* partition - The partition number of the file with the new extent.
* segment - The segment number of the file with the new extent.
* segFile - The name of the relevant column segment file.
* pFile - IDBDataFile ptr to the file where the extent is added.
* newFile - Indicates if the extent was added to a new or existing file
* hdrs - Contents of the headers if file is compressed.
* RETURN:
* NO_ERROR if success
* else the applicable error code is returned
***********************************************************/
int FileOp::extendFile(
OID oid,
uint64_t emptyVal,
int width,
HWM hwm,
BRM::LBID_t startLbid,
int allocSize,
uint16_t dbRoot,
uint32_t partition,
uint16_t segment,
std::string& segFile,
IDBDataFile*& pFile,
bool& newFile,
char* hdrs)
{
int rc = NO_ERROR;
pFile = 0;
segFile.clear();
newFile = false;
char fileName[FILE_NAME_SIZE];
// If starting hwm or fbo is 0 then this is the first extent of a new file,
// else we are adding an extent to an existing segment file
if (hwm > 0) // db segment file should exist
{
RETURN_ON_ERROR( oid2FileName(oid, fileName, false,
dbRoot, partition, segment) );
segFile = fileName;
if (!exists(fileName))
{
ostringstream oss;
oss << "oid: " << oid << " with path " << segFile;
logging::Message::Args args;
args.add("File not found ");
args.add(oss.str());
args.add("");
args.add("");
SimpleSysLog::instance()->logMsg(args,
logging::LOG_TYPE_ERROR,
logging::M0001);
return ERR_FILE_NOT_EXIST;
}
pFile = openFile( oid, dbRoot, partition, segment, segFile, "r+b" );//old file
if (pFile == 0)
{
ostringstream oss;
oss << "oid: " << oid << " with path " << segFile;
logging::Message::Args args;
args.add("Error opening file ");
args.add(oss.str());
args.add("");
args.add("");
SimpleSysLog::instance()->logMsg(args,
logging::LOG_TYPE_ERROR,
logging::M0001);
return ERR_FILE_OPEN;
}
if ( isDebug(DEBUG_1) && getLogger() )
{
std::ostringstream oss;
oss << "Opening existing column file (extendFile)" <<
": OID-" << oid <<
"; DBRoot-" << dbRoot <<
"; part-" << partition <<
"; seg-" << segment <<
"; LBID-" << startLbid <<
"; hwm-" << hwm <<
"; file-" << segFile;
getLogger()->logMsg( oss.str(), MSGLVL_INFO2 );
}
// @bug 5349: check that new extent's fbo is not past current EOF
if (m_compressionType)
{
char hdrsIn[ compress::IDBCompressInterface::HDR_BUF_LEN * 2 ];
RETURN_ON_ERROR( readHeaders(pFile, hdrsIn) );
IDBCompressInterface compressor;
unsigned int ptrCount = compressor.getPtrCount(hdrsIn);
unsigned int chunkIndex = 0;
unsigned int blockOffsetWithinChunk = 0;
compressor.locateBlock((hwm - 1), chunkIndex, blockOffsetWithinChunk);
//std::ostringstream oss1;
//oss1 << "Extending compressed column file"<<
// ": OID-" << oid <<
// "; LBID-" << startLbid <<
// "; fbo-" << hwm <<
// "; file-" << segFile <<
// "; chkidx-" << chunkIndex<<
// "; numPtrs-"<< ptrCount;
//getLogger()->logMsg( oss1.str(), MSGLVL_INFO2 );
if (chunkIndex >= ptrCount)
{
ostringstream oss;
oss << "oid: " << oid << " with path " << segFile <<
"; new extent fbo " << hwm << "; number of "
"compressed chunks " << ptrCount <<
"; chunkIndex " << chunkIndex;
logging::Message::Args args;
args.add("compressed");
args.add(oss.str());
SimpleSysLog::instance()->logMsg(args,
logging::LOG_TYPE_ERROR,
logging::M0103);
// Expand the partial extent to full with emptyVal
// Since fillCompColumnExtentEmptyChunks() messes with the
// file on disk, we need to close it and reopen after or
// the cache isn't updated.
if ((pFile))
closeFile( pFile );
pFile = NULL;
string failedTask; // For return error message, if any.
rc = FileOp::fillCompColumnExtentEmptyChunks(oid,
width,
emptyVal,
dbRoot,
partition,
segment,
hwm,
segFile,
failedTask);
if (rc != NO_ERROR)
{
if (getLogger())
{
std::ostringstream oss;
oss << "FileOp::extendFile: error padding partial compressed extent for " <<
"column OID-" << oid <<
"; DBRoot-" << dbRoot <<
"; part-" << partition <<
"; seg-" << segment <<
"; hwm-" << hwm <<
" " << failedTask.c_str();
getLogger()->logMsg( oss.str(), rc, MSGLVL_CRITICAL );
}
return rc;
}
pFile = openFile( oid, dbRoot, partition, segment, segFile, "r+b" ); // modified file
}
// Get the latest file header for the caller. If a partial extent was filled out,
// this will be different than when we first read the headers.
if (hdrs)
{
RETURN_ON_ERROR( readHeaders(pFile, hdrs) );
}
}
else
{
long long fileSize;
RETURN_ON_ERROR( getFileSize(pFile, fileSize) );
long long calculatedFileSize = ((long long)hwm) * BYTE_PER_BLOCK;
//std::ostringstream oss2;
//oss2 << "Extending uncompressed column file"<<
// ": OID-" << oid <<
// "; LBID-" << startLbid <<
// "; fbo-" << hwm <<
// "; file-" << segFile <<
// "; filesize-"<<fileSize;
//getLogger()->logMsg( oss2.str(), MSGLVL_INFO2 );
if (calculatedFileSize > fileSize)
{
ostringstream oss;
oss << "oid: " << oid << " with path " << segFile <<
"; new extent fbo " << hwm << "; file size (bytes) " <<
fileSize;
logging::Message::Args args;
args.add("uncompressed");
args.add(oss.str());
SimpleSysLog::instance()->logMsg(args,
logging::LOG_TYPE_ERROR,
logging::M0103);
// Expand the partial extent to full with emptyVal
// This generally won't ever happen, as uncompressed files
// are created with full extents.
rc = FileOp::expandAbbrevColumnExtent( pFile, dbRoot,
emptyVal, width);
if (rc != NO_ERROR)
{
if (getLogger())
{
std::ostringstream oss;
oss << "FileOp::extendFile: error padding partial uncompressed extent for " <<
"column OID-" << oid <<
"; DBRoot-" << dbRoot <<
"; part-" << partition <<
"; seg-" << segment <<
"; hwm-" << hwm;
getLogger()->logMsg( oss.str(), rc, MSGLVL_CRITICAL );
}
return rc;
}
}
}
}
else // db segment file should not exist
{
RETURN_ON_ERROR( oid2FileName(oid, fileName, true,
dbRoot, partition, segment) );
segFile = fileName;
// if obsolete file exists, "w+b" will truncate and write over
pFile = openFile( fileName, "w+b" );//new file
if (pFile == 0)
return ERR_FILE_CREATE;
newFile = true;
if ( isDebug(DEBUG_1) && getLogger() )
{
std::ostringstream oss;
oss << "Opening new column file" <<
": OID-" << oid <<
"; DBRoot-" << dbRoot <<
"; part-" << partition <<
"; seg-" << segment <<
"; LBID-" << startLbid <<
"; hwm-" << hwm <<
"; file-" << segFile;
getLogger()->logMsg( oss.str(), MSGLVL_INFO2 );
}
if ((m_compressionType) && (hdrs))
{
IDBCompressInterface compressor;
compressor.initHdr(hdrs, m_compressionType);
}
}
#ifdef _MSC_VER
//Need to call the win version with a dir, not a file
if (!isDiskSpaceAvail(Config::getDBRootByNum(dbRoot), allocSize))
#else
if ( !isDiskSpaceAvail(segFile, allocSize) )
#endif
{
return ERR_FILE_DISK_SPACE;
}
// We set to EOF just before we start adding the blocks for the new extent.
// At one time, I considered changing this to seek to the HWM block, but
// with compressed files, this is murky; do I find and seek to the chunk
// containing the HWM block? So I left as-is for now, seeking to EOF.
rc = setFileOffset(pFile, 0, SEEK_END);
if (rc != NO_ERROR)
return rc;
// Initialize the contents of the extent.
// MCOL-498 optimize full extent creation.
rc = initColumnExtent( pFile,
dbRoot,
allocSize,
emptyVal,
width,
newFile, // new or existing file
false, // don't expand; new extent
false, // add full (not abbreviated) extent
true); // try to optimize extent creation
return rc;
}
/***********************************************************
* DESCRIPTION:
* Add an extent to the exact segment file specified by
* the designated OID, DBRoot, partition, and segment.
* PARAMETERS:
* oid - OID of the column to be extended
* emptyVal - Empty value to be used for oid
* width - Width of the column (in bytes)
* allocSize - Number of blocks allocated to the extent.
* dbRoot - The DBRoot of the file with the new extent.
* partition - The partition number of the file with the new extent.
* segment - The segment number of the file with the new extent.
* segFile - The name of the relevant column segment file.
* startLbid - The starting LBID for the new extent
* newFile - Indicates if the extent was added to a new or existing file
* hdrs - Contents of the headers if file is compressed.
* RETURN:
* none
***********************************************************/
int FileOp::addExtentExactFile(
OID oid,
uint64_t emptyVal,
int width,
int& allocSize,
uint16_t dbRoot,
uint32_t partition,
uint16_t segment,
execplan::CalpontSystemCatalog::ColDataType colDataType,
std::string& segFile,
BRM::LBID_t& startLbid,
bool& newFile,
char* hdrs)
{
int rc = NO_ERROR;
IDBDataFile* pFile = 0;
segFile.clear();
newFile = false;
HWM hwm;
// Allocate the new extent in the ExtentMap
RETURN_ON_ERROR( BRMWrapper::getInstance()->allocateColExtentExactFile(
oid, width, dbRoot, partition, segment, colDataType, startLbid, allocSize, hwm));
// Determine the existence of the "next" segment file, and either open
// or create the segment file accordingly.
if (exists(oid, dbRoot, partition, segment))
{
pFile = openFile( oid, dbRoot, partition, segment,
segFile, "r+b" );//old file
if (pFile == 0)
{
ostringstream oss;
oss << "oid: " << oid << " with path " << segFile;
logging::Message::Args args;
args.add("Error opening file ");
args.add(oss.str());
args.add("");
args.add("");
SimpleSysLog::instance()->logMsg(args,
logging::LOG_TYPE_ERROR,
logging::M0001);
return ERR_FILE_OPEN;
}
if ( isDebug(DEBUG_1) && getLogger() )
{
std::ostringstream oss;
oss << "Opening existing column file" <<
": OID-" << oid <<
"; DBRoot-" << dbRoot <<
"; part-" << partition <<
"; seg-" << segment <<
"; LBID-" << startLbid <<
"; hwm-" << hwm <<
"; file-" << segFile;
getLogger()->logMsg( oss.str(), MSGLVL_INFO2 );
}
if ((m_compressionType) && (hdrs))
{
rc = readHeaders(pFile, hdrs);
if (rc != NO_ERROR)
return rc;
}
}
else
{
char fileName[FILE_NAME_SIZE];
RETURN_ON_ERROR( oid2FileName(oid, fileName, true,
dbRoot, partition, segment) );
segFile = fileName;
pFile = openFile( fileName, "w+b" );//new file
if (pFile == 0)
return ERR_FILE_CREATE;
newFile = true;
if ( isDebug(DEBUG_1) && getLogger() )
{
std::ostringstream oss;
oss << "Opening new column file" <<
": OID-" << oid <<
"; DBRoot-" << dbRoot <<
"; part-" << partition <<
"; seg-" << segment <<
"; LBID-" << startLbid <<
"; hwm-" << hwm <<
"; file-" << segFile;
getLogger()->logMsg( oss.str(), MSGLVL_INFO2 );
}
if ((m_compressionType) && (hdrs))
{
IDBCompressInterface compressor;
compressor.initHdr(hdrs, m_compressionType);
}
}
#ifdef _MSC_VER
//Need to call the win version with a dir, not a file
if (!isDiskSpaceAvail(Config::getDBRootByNum(dbRoot), allocSize))
#else
if ( !isDiskSpaceAvail(segFile, allocSize) )
#endif
{
return ERR_FILE_DISK_SPACE;
}
// We set to EOF just before we start adding the blocks for the new extent.
// At one time, I considered changing this to seek to the HWM block, but
// with compressed files, this is murky; do I find and seek to the chunk
// containing the HWM block? So I left as-is for now, seeking to EOF.
rc = setFileOffset(pFile, 0, SEEK_END);
if (rc != NO_ERROR)
return rc;
// Initialize the contents of the extent.
// CS doesn't optimize file operations to have a valid
// segment files with empty magics
rc = initColumnExtent( pFile,
dbRoot,
allocSize,
emptyVal,
width,
newFile, // new or existing file
false, // don't expand; new extent
false ); // add full (not abbreviated) extent
closeFile( pFile );
return rc;
}
/***********************************************************
* DESCRIPTION:
* Write out (initialize) an extent in a column file.
* A mutex is used for each DBRoot, to prevent contention between
* threads, because if multiple threads are creating extents on
* the same DBRoot at the same time, the extents can become
* fragmented. It is best to only create one extent at a time
* on each DBRoot.
* This function can be used to initialize an entirely new extent, or
* to finish initializing an extent that has already been started.
* nBlocks controls how many 8192-byte blocks are to be written out.
* If bOptExtension is set then method first checks config for
* DBRootX.Prealloc. If it is disabled then it skips disk space
* preallocation.
* PARAMETERS:
* pFile (in) - IDBDataFile* of column segment file to be written to
* dbRoot (in) - DBRoot of pFile
* nBlocks (in) - number of blocks to be written for an extent
* emptyVal(in) - empty value to be used for column data values
* width (in) - width of the applicable column
* bNewFile(in) - are we adding an extent to a new file, in which case
* headers will be included "if" it is a compressed file.
* bExpandExtent (in) - Expand existing extent, or initialize a new one
* bAbbrevExtent(in) - if creating new extent, is it an abbreviated extent
* bOptExtension(in) - skip full extent preallocation.
* RETURN:
* returns ERR_FILE_WRITE if an error occurs,
* else returns NO_ERROR.
***********************************************************/
int FileOp::initColumnExtent(
IDBDataFile* pFile,
uint16_t dbRoot,
int nBlocks,
uint64_t emptyVal,
int width,
bool bNewFile,
bool bExpandExtent,
bool bAbbrevExtent,
bool bOptExtension)
{
if ((bNewFile) && (m_compressionType))
{
char hdrs[IDBCompressInterface::HDR_BUF_LEN * 2];
IDBCompressInterface compressor;
compressor.initHdr(hdrs, m_compressionType);
if (bAbbrevExtent)
compressor.setBlockCount(hdrs, nBlocks);
RETURN_ON_ERROR(writeHeaders(pFile, hdrs));
}
// @bug5769 Don't initialize extents or truncate db files on HDFS
if (idbdatafile::IDBPolicy::useHdfs())
{
//@Bug 3219. update the compression header after the extent is expanded.
if ((!bNewFile) && (m_compressionType) && (bExpandExtent))
{
updateColumnExtent(pFile, nBlocks);
}
// @bug 2378. Synchronize here to avoid write buffer pile up too much,
// which could cause controllernode to timeout later when it needs to
// save a snapshot.
pFile->flush();
}
else
{
// Create vector of mutexes used to serialize extent access per DBRoot
initDbRootExtentMutexes( );
// MCOL-498 Skip the huge preallocations if the option is set
// for the dbroot. This check is skiped for abbreviated extent.
// IMO it is better to check bool then to call a function.
if ( bOptExtension )
{
bOptExtension = (idbdatafile::IDBPolicy::PreallocSpace(dbRoot))
? bOptExtension : false;
}
// Reduce number of blocks allocated for abbreviated extents thus
// CS writes less when creates a new table. This couldn't be zero
// b/c Snappy compressed file format doesn't tolerate empty files.
int realNBlocks = ( bOptExtension && nBlocks <= MAX_INITIAL_EXTENT_BLOCKS_TO_DISK ) ? 3 : nBlocks;
// Determine the number of blocks in each call to fwrite(), and the
// number of fwrite() calls to make, based on this. In other words,
// we put a cap on the "writeSize" so that we don't allocate and write
// an entire extent at once for the 64M row extents. If we are
// expanding an abbreviated 64M extent, we may not have an even
// multiple of MAX_NBLOCKS to write; remWriteSize is the number of
// blocks above and beyond loopCount*MAX_NBLOCKS.
int writeSize = realNBlocks * BYTE_PER_BLOCK; // 1M and 8M row extent size
int loopCount = 1;
int remWriteSize = 0;
if (realNBlocks > MAX_NBLOCKS) // 64M row extent size
{
writeSize = MAX_NBLOCKS * BYTE_PER_BLOCK;
loopCount = realNBlocks / MAX_NBLOCKS;
remWriteSize = realNBlocks - (loopCount * MAX_NBLOCKS);
}
// Allocate a buffer, initialize it, and use it to create the extent
idbassert(dbRoot > 0);
#ifdef PROFILE
if (bExpandExtent)
Stats::startParseEvent(WE_STATS_WAIT_TO_EXPAND_COL_EXTENT);
else
Stats::startParseEvent(WE_STATS_WAIT_TO_CREATE_COL_EXTENT);
#endif
boost::mutex::scoped_lock lk(*m_DbRootAddExtentMutexes[dbRoot]);
#ifdef PROFILE
if (bExpandExtent)
Stats::stopParseEvent(WE_STATS_WAIT_TO_EXPAND_COL_EXTENT);
else
Stats::stopParseEvent(WE_STATS_WAIT_TO_CREATE_COL_EXTENT);
#endif
// Skip space preallocation if configured so
// fallback to sequential write otherwise.
// Couldn't avoid preallocation for full extents,
// e.g. ADD COLUMN DDL b/c CS has to fill the file
// with empty magics.
if ( !bOptExtension )
{
#ifdef PROFILE
Stats::startParseEvent(WE_STATS_INIT_COL_EXTENT);
#endif
// Allocate buffer, store it in scoped_array to insure it's deletion.
// Create scope {...} to manage deletion of writeBuf.
{
unsigned char* writeBuf = new unsigned char[writeSize];
boost::scoped_array<unsigned char> writeBufPtr( writeBuf );
setEmptyBuf( writeBuf, writeSize, emptyVal, width );
#ifdef PROFILE
Stats::stopParseEvent(WE_STATS_INIT_COL_EXTENT);
if (bExpandExtent)
Stats::startParseEvent(WE_STATS_EXPAND_COL_EXTENT);
else
Stats::startParseEvent(WE_STATS_CREATE_COL_EXTENT);
#endif
//std::ostringstream oss;
//oss << "initColExtent: width-" << width <<
//"; loopCount-" << loopCount <<
//"; writeSize-" << writeSize;
//std::cout << oss.str() << std::endl;
if (remWriteSize > 0)
{
if ( pFile->write( writeBuf, remWriteSize ) != remWriteSize )
{
return ERR_FILE_WRITE;
}
}
for (int j = 0; j < loopCount; j++)
{
if ( pFile->write( writeBuf, writeSize ) != writeSize )
{
return ERR_FILE_WRITE;
}
}
}
//@Bug 3219. update the compression header after the extent is expanded.
if ((!bNewFile) && (m_compressionType) && (bExpandExtent))
{
updateColumnExtent(pFile, nBlocks);
}
// @bug 2378. Synchronize here to avoid write buffer pile up too much,
// which could cause controllernode to timeout later when it needs to
// save a snapshot.
pFile->flush();
#ifdef PROFILE
if (bExpandExtent)
Stats::stopParseEvent(WE_STATS_EXPAND_COL_EXTENT);
else
Stats::stopParseEvent(WE_STATS_CREATE_COL_EXTENT);
#endif
}
}
return NO_ERROR;
}
/***********************************************************
* DESCRIPTION:
* Write (initialize) an abbreviated compressed extent in a column file.
* nBlocks controls how many 8192-byte blocks are to be written out.
* PARAMETERS:
* pFile (in) - IDBDataFile* of column segment file to be written to
* dbRoot (in) - DBRoot of pFile
* nBlocks (in) - number of blocks to be written for an extent
* emptyVal(in) - empty value to be used for column data values
* width (in) - width of the applicable column
* RETURN:
* returns ERR_FILE_WRITE or ERR_FILE_SEEK if an error occurs,
* else returns NO_ERROR.
***********************************************************/
int FileOp::initAbbrevCompColumnExtent(
IDBDataFile* pFile,
uint16_t dbRoot,
int nBlocks,
uint64_t emptyVal,
int width)
{
// Reserve disk space for optimized abbreviated extent
int rc = initColumnExtent( pFile,
dbRoot,
nBlocks,
emptyVal,
width,
true, // new file
false, // don't expand; add new extent
true, // add abbreviated extent
true); // optimize the initial extent
if (rc != NO_ERROR)
{
return rc;
}
#ifdef PROFILE
Stats::startParseEvent(WE_STATS_COMPRESS_COL_INIT_ABBREV_EXT);
#endif
char hdrs[IDBCompressInterface::HDR_BUF_LEN * 2];
rc = writeInitialCompColumnChunk( pFile,
nBlocks,
INITIAL_EXTENT_ROWS_TO_DISK,
emptyVal,
width,
hdrs );
if (rc != NO_ERROR)
{
return rc;
}
#ifdef PROFILE
Stats::stopParseEvent(WE_STATS_COMPRESS_COL_INIT_ABBREV_EXT);
#endif
return NO_ERROR;
}
/***********************************************************
* DESCRIPTION:
* Write (initialize) the first extent in a compressed db file.
* PARAMETERS:
* pFile - IDBDataFile* of column segment file to be written to
* nBlocksAllocated - number of blocks allocated to the extent; should be
* enough blocks for a full extent, unless it's the abbreviated extent
* nRows - number of rows to initialize, or write out to the file
* emptyVal - empty value to be used for column data values
* width - width of the applicable column (in bytes)
* hdrs - (in/out) chunk pointer headers
* RETURN:
* returns NO_ERROR on success.
***********************************************************/
int FileOp::writeInitialCompColumnChunk(
IDBDataFile* pFile,
int nBlocksAllocated,
int nRows,
uint64_t emptyVal,
int width,
char* hdrs)
{
const int INPUT_BUFFER_SIZE = nRows * width;
char* toBeCompressedInput = new char[INPUT_BUFFER_SIZE];
unsigned int userPaddingBytes = Config::getNumCompressedPadBlks() *
BYTE_PER_BLOCK;
const int OUTPUT_BUFFER_SIZE = IDBCompressInterface::maxCompressedSize(INPUT_BUFFER_SIZE) +
userPaddingBytes;
unsigned char* compressedOutput = new unsigned char[OUTPUT_BUFFER_SIZE];
unsigned int outputLen = OUTPUT_BUFFER_SIZE;
boost::scoped_array<char> toBeCompressedInputPtr( toBeCompressedInput );
boost::scoped_array<unsigned char> compressedOutputPtr(compressedOutput);
setEmptyBuf( (unsigned char*)toBeCompressedInput,
INPUT_BUFFER_SIZE, emptyVal, width);
// Compress an initialized abbreviated extent
IDBCompressInterface compressor( userPaddingBytes );
int rc = compressor.compressBlock(toBeCompressedInput,
INPUT_BUFFER_SIZE, compressedOutput, outputLen );
if (rc != 0)
{
return ERR_COMP_COMPRESS;
}
// Round up the compressed chunk size
rc = compressor.padCompressedChunks( compressedOutput,
outputLen, OUTPUT_BUFFER_SIZE );
if (rc != 0)
{
return ERR_COMP_PAD_DATA;
}
// std::cout << "Uncompressed rowCount: " << nRows <<
// "; colWidth: " << width <<
// "; uncompByteCnt: " << INPUT_BUFFER_SIZE <<
// "; blkAllocCnt: " << nBlocksAllocated <<
// "; compressedByteCnt: " << outputLen << std::endl;
compressor.initHdr(hdrs, m_compressionType);
compressor.setBlockCount(hdrs, nBlocksAllocated);
// Store compression pointers in the header
std::vector<uint64_t> ptrs;
ptrs.push_back( IDBCompressInterface::HDR_BUF_LEN * 2 );
ptrs.push_back( outputLen + (IDBCompressInterface::HDR_BUF_LEN * 2) );
compressor.storePtrs(ptrs, hdrs);
RETURN_ON_ERROR( writeHeaders(pFile, hdrs) );
// Write the compressed data
if ( pFile->write( compressedOutput, outputLen ) != outputLen )
{
return ERR_FILE_WRITE;
}
return NO_ERROR;
}
/***********************************************************
* DESCRIPTION:
* Fill specified compressed extent with empty value chunks.
* PARAMETERS:
* oid - OID for relevant column
* colWidth - width in bytes of this column
* emptyVal - empty value to be used in filling empty chunks
* dbRoot - DBRoot of extent to be filled
* partition - partition of extent to be filled
* segment - segment file number of extent to be filled
* hwm - proposed new HWM of filled in extent
* segFile - (out) name of updated segment file
* failedTask - (out) if error occurs, this is the task that failed
* RETURN:
* returns NO_ERROR if success.
***********************************************************/
int FileOp::fillCompColumnExtentEmptyChunks(OID oid,
int colWidth,
uint64_t emptyVal,
uint16_t dbRoot,
uint32_t partition,
uint16_t segment,
HWM hwm,
std::string& segFile,
std::string& failedTask)
{
int rc = NO_ERROR;
segFile.clear();
failedTask.clear();
// Open the file and read the headers with the compression chunk pointers
// @bug 5572 - HDFS usage: incorporate *.tmp file backup flag
IDBDataFile* pFile = openFile( oid, dbRoot, partition, segment, segFile,
"r+b", DEFAULT_COLSIZ, true );
if (!pFile)
{
failedTask = "Opening file";
ostringstream oss;
oss << "oid: " << oid << " with path " << segFile;
logging::Message::Args args;
args.add("Error opening file ");
args.add(oss.str());
args.add("");
args.add("");
SimpleSysLog::instance()->logMsg(args,
logging::LOG_TYPE_ERROR,
logging::M0001);
return ERR_FILE_OPEN;
}
char hdrs[ IDBCompressInterface::HDR_BUF_LEN * 2 ];
rc = readHeaders( pFile, hdrs );
if (rc != NO_ERROR)
{
failedTask = "Reading headers";
closeFile ( pFile );
return rc;
}
int userPadBytes = Config::getNumCompressedPadBlks() * BYTE_PER_BLOCK;
IDBCompressInterface compressor( userPadBytes );
CompChunkPtrList chunkPtrs;
int rcComp = compressor.getPtrList( hdrs, chunkPtrs );
if (rcComp != 0)
{
failedTask = "Getting header ptrs";
closeFile ( pFile );
return ERR_COMP_PARSE_HDRS;
}
// Nothing to do if the proposed HWM is < the current block count
uint64_t blkCount = compressor.getBlockCount(hdrs);
if (blkCount > (hwm + 1))
{
closeFile ( pFile );
return NO_ERROR;
}
const unsigned int ROWS_PER_EXTENT =
BRMWrapper::getInstance()->getInstance()->getExtentRows();
const unsigned int ROWS_PER_CHUNK =
IDBCompressInterface::UNCOMPRESSED_INBUF_LEN / colWidth;
const unsigned int CHUNKS_PER_EXTENT = ROWS_PER_EXTENT / ROWS_PER_CHUNK;
// If this is an abbreviated extent, we first expand to a full extent
// @bug 4340 - support moving the DBRoot with a single abbrev extent
if ( (chunkPtrs.size() == 1) &&
((blkCount * BYTE_PER_BLOCK) ==
(uint64_t)(INITIAL_EXTENT_ROWS_TO_DISK * colWidth)) )
{
if ( getLogger() )
{
std::ostringstream oss;
oss << "Converting abbreviated partial extent to full extent for" <<
": OID-" << oid <<
"; DBRoot-" << dbRoot <<
"; part-" << partition <<
"; seg-" << segment <<
"; file-" << segFile <<
"; wid-" << colWidth <<
"; oldBlkCnt-" << blkCount <<
"; newBlkCnt-" <<
((ROWS_PER_EXTENT * colWidth) / BYTE_PER_BLOCK);
getLogger()->logMsg( oss.str(), MSGLVL_INFO2 );
}
off64_t endHdrsOffset = pFile->tell();
rc = expandAbbrevColumnExtent( pFile, dbRoot, emptyVal, colWidth );
if (rc != NO_ERROR)
{
failedTask = "Expanding abbreviated extent";
closeFile ( pFile );
return rc;
}
CompChunkPtr chunkOutPtr;
rc = expandAbbrevColumnChunk( pFile, emptyVal, colWidth,
chunkPtrs[0], chunkOutPtr );
if (rc != NO_ERROR)
{
failedTask = "Expanding abbreviated chunk";
closeFile ( pFile );
return rc;
}
chunkPtrs[0] = chunkOutPtr; // update chunkPtrs with new chunk size
rc = setFileOffset( pFile, endHdrsOffset );
if (rc != NO_ERROR)
{
failedTask = "Positioning file to end of headers";
closeFile ( pFile );
return rc;
}
// Update block count to reflect a full extent
blkCount = (ROWS_PER_EXTENT * colWidth) / BYTE_PER_BLOCK;
compressor.setBlockCount( hdrs, blkCount );
}
// Calculate the number of empty chunks we need to add to fill this extent
unsigned numChunksToFill = 0;
ldiv_t ldivResult = ldiv(chunkPtrs.size(), CHUNKS_PER_EXTENT);
if (ldivResult.rem != 0)
{
numChunksToFill = CHUNKS_PER_EXTENT - ldivResult.rem;
}
#if 0
std::cout << "Number of allocated blocks: " <<
compressor.getBlockCount(hdrs) << std::endl;
std::cout << "Pointer Header Size (in bytes): " <<
(compressor.getHdrSize(hdrs) -
IDBCompressInterface::HDR_BUF_LEN) << std::endl;
std::cout << "Chunk Pointers (offset,length): " << std::endl;
for (unsigned k = 0; k < chunkPtrs.size(); k++)
{
std::cout << " " << k << ". " << chunkPtrs[k].first <<
" , " << chunkPtrs[k].second << std::endl;
}
std::cout << std::endl;
std::cout << "Number of chunks to fill in: " << numChunksToFill <<
std::endl << std::endl;
#endif
off64_t endOffset = 0;
// Fill in or add necessary remaining empty chunks
if (numChunksToFill > 0)
{
const int IN_BUF_LEN = IDBCompressInterface::UNCOMPRESSED_INBUF_LEN;
const int OUT_BUF_LEN = IDBCompressInterface::maxCompressedSize(IN_BUF_LEN) + userPadBytes;
// Allocate buffer, and store in scoped_array to insure it's deletion.
// Create scope {...} to manage deletion of buffers
{
char* toBeCompressedBuf = new char [ IN_BUF_LEN ];
unsigned char* compressedBuf = new unsigned char[ OUT_BUF_LEN ];
boost::scoped_array<char> toBeCompressedInputPtr(toBeCompressedBuf);
boost::scoped_array<unsigned char>
compressedOutputPtr(compressedBuf);
// Compress and then pad the compressed chunk
setEmptyBuf( (unsigned char*)toBeCompressedBuf,
IN_BUF_LEN, emptyVal, colWidth );
unsigned int outputLen = OUT_BUF_LEN;
rcComp = compressor.compressBlock( toBeCompressedBuf,
IN_BUF_LEN, compressedBuf, outputLen );
if (rcComp != 0)
{
failedTask = "Compressing chunk";
closeFile ( pFile );
return ERR_COMP_COMPRESS;
}
toBeCompressedInputPtr.reset(); // release memory
rcComp = compressor.padCompressedChunks( compressedBuf,
outputLen, OUT_BUF_LEN );
if (rcComp != 0)
{
failedTask = "Padding compressed chunk";
closeFile ( pFile );
return ERR_COMP_PAD_DATA;
}
// Position file to write empty chunks; default to end of headers
// in case there are no chunks listed in the header
off64_t startOffset = pFile->tell();
if (chunkPtrs.size() > 0)
{
startOffset = chunkPtrs[chunkPtrs.size() - 1].first +
chunkPtrs[chunkPtrs.size() - 1].second;
rc = setFileOffset( pFile, startOffset );
if (rc != NO_ERROR)
{
failedTask = "Positioning file to begin filling chunks";
closeFile ( pFile );
return rc;
}
}
// Write chunks needed to fill out the current extent, add chunk ptr
for (unsigned k = 0; k < numChunksToFill; k++)
{
rc = writeFile( pFile,
(unsigned char*)compressedBuf,
outputLen );
if (rc != NO_ERROR)
{
failedTask = "Writing a chunk";
closeFile ( pFile );
return rc;
}
CompChunkPtr compChunk( startOffset, outputLen );
chunkPtrs.push_back( compChunk );
startOffset = pFile->tell();
}
} // end of scope for boost scoped array pointers
endOffset = pFile->tell();
// Update the compressed chunk pointers in the header
std::vector<uint64_t> ptrs;
for (unsigned i = 0; i < chunkPtrs.size(); i++)
{
ptrs.push_back( chunkPtrs[i].first );
}
ptrs.push_back( chunkPtrs[chunkPtrs.size() - 1].first +
chunkPtrs[chunkPtrs.size() - 1].second );
compressor.storePtrs( ptrs, hdrs );
rc = writeHeaders( pFile, hdrs );
if (rc != NO_ERROR)
{
failedTask = "Writing headers";
closeFile ( pFile );
return rc;
}
} // end of "numChunksToFill > 0"
else
{
// if no chunks to add, then set endOffset to truncate the db file
// strictly based on the chunks that are already in the file
if (chunkPtrs.size() > 0)
{
endOffset = chunkPtrs[chunkPtrs.size() - 1].first +
chunkPtrs[chunkPtrs.size() - 1].second;
}
}
// Truncate the file to release unused space for the extent we just filled
if (endOffset > 0)
{
rc = truncateFile(pFile, endOffset);
if (rc != NO_ERROR)
{
failedTask = "Truncating file";
closeFile ( pFile );
return rc;
}
}
closeFile ( pFile );
return NO_ERROR;
}
/***********************************************************
* DESCRIPTION:
* Expand first chunk in pFile from an abbreviated chunk for an abbreviated
* extent to a full compressed chunk for a full extent.
* PARAMETERS:
* pFile - file to be updated
* colWidth - width in bytes of this column
* emptyVal - empty value to be used in filling empty chunks
* chunkInPtr - chunk pointer referencing first (abbrev) chunk
* chunkOutPtr- (out) updated chunk ptr referencing first (full) chunk
* RETURN:
* returns NO_ERROR if success.
***********************************************************/
int FileOp::expandAbbrevColumnChunk(
IDBDataFile* pFile,
uint64_t emptyVal,
int colWidth,
const CompChunkPtr& chunkInPtr,
CompChunkPtr& chunkOutPtr )
{
int userPadBytes = Config::getNumCompressedPadBlks() * BYTE_PER_BLOCK;
const int IN_BUF_LEN = IDBCompressInterface::UNCOMPRESSED_INBUF_LEN;
const int OUT_BUF_LEN = IDBCompressInterface::maxCompressedSize(IN_BUF_LEN) + userPadBytes;
char* toBeCompressedBuf = new char[ IN_BUF_LEN ];
boost::scoped_array<char> toBeCompressedPtr(toBeCompressedBuf);
setEmptyBuf( (unsigned char*)toBeCompressedBuf,
IN_BUF_LEN, emptyVal, colWidth );
RETURN_ON_ERROR( setFileOffset(pFile, chunkInPtr.first, SEEK_SET) );
char* compressedInBuf = new char[ chunkInPtr.second ];
boost::scoped_array<char> compressedInBufPtr(compressedInBuf);
RETURN_ON_ERROR( readFile(pFile, (unsigned char*)compressedInBuf,
chunkInPtr.second) );
// Uncompress an "abbreviated" chunk into our 4MB buffer
unsigned int outputLen = IN_BUF_LEN;
IDBCompressInterface compressor( userPadBytes );
int rc = compressor.uncompressBlock(
compressedInBuf,
chunkInPtr.second,
(unsigned char*)toBeCompressedBuf,
outputLen);
if (rc != 0)
{
return ERR_COMP_UNCOMPRESS;
}
compressedInBufPtr.reset(); // release memory
RETURN_ON_ERROR( setFileOffset(pFile, chunkInPtr.first, SEEK_SET) );
unsigned char* compressedOutBuf = new unsigned char[ OUT_BUF_LEN ];
boost::scoped_array<unsigned char> compressedOutBufPtr(compressedOutBuf);
// Compress the data we just read, as a "full" 4MB chunk
outputLen = OUT_BUF_LEN;
rc = compressor.compressBlock(
reinterpret_cast<char*>(toBeCompressedBuf),
IN_BUF_LEN,
compressedOutBuf,
outputLen );
if (rc != 0)
{
return ERR_COMP_COMPRESS;
}
// Round up the compressed chunk size
rc = compressor.padCompressedChunks( compressedOutBuf,
outputLen, OUT_BUF_LEN );
if (rc != 0)
{
return ERR_COMP_PAD_DATA;
}
RETURN_ON_ERROR( writeFile(pFile, compressedOutBuf, outputLen) );
chunkOutPtr.first = chunkInPtr.first;
chunkOutPtr.second = outputLen;
return NO_ERROR;
}
/***********************************************************
* DESCRIPTION:
* Write headers to a compressed column file.
* PARAMETERS:
* pFile (in) - IDBDataFile* of column segment file to be written to
* hdr (in) - header pointers to be written
* RETURN:
* returns ERR_FILE_WRITE or ERR_FILE_SEEK if an error occurs,
* else returns NO_ERROR.
***********************************************************/
int FileOp::writeHeaders(IDBDataFile* pFile, const char* hdr) const
{
RETURN_ON_ERROR( setFileOffset(pFile, 0, SEEK_SET) );
// Write the headers
if (pFile->write( hdr, IDBCompressInterface::HDR_BUF_LEN * 2 ) != IDBCompressInterface::HDR_BUF_LEN * 2)
{
return ERR_FILE_WRITE;
}
return NO_ERROR;
}
/***********************************************************
* DESCRIPTION:
* Write headers to a compressed column or dictionary file.
* PARAMETERS:
* pFile (in) - IDBDataFile* of column segment file to be written to
* controlHdr (in) - control header to be written
* pointerHdr (in) - pointer header to be written
* ptrHdrSize (in) - size (in bytes) of pointer header
* RETURN:
* returns ERR_FILE_WRITE or ERR_FILE_SEEK if an error occurs,
* else returns NO_ERROR.
***********************************************************/
int FileOp::writeHeaders(IDBDataFile* pFile, const char* controlHdr,
const char* pointerHdr, uint64_t ptrHdrSize) const
{
RETURN_ON_ERROR( setFileOffset(pFile, 0, SEEK_SET) );
// Write the control header
if (pFile->write( controlHdr, IDBCompressInterface::HDR_BUF_LEN ) != IDBCompressInterface::HDR_BUF_LEN)
{
return ERR_FILE_WRITE;
}
// Write the pointer header
if (pFile->write( pointerHdr, ptrHdrSize ) != (ssize_t) ptrHdrSize)
{
return ERR_FILE_WRITE;
}
return NO_ERROR;
}
/***********************************************************
* DESCRIPTION:
* Write out (initialize) an extent in a dictionary store file.
* A mutex is used for each DBRoot, to prevent contention between
* threads, because if multiple threads are creating extents on
* the same DBRoot at the same time, the extents can become
* fragmented. It is best to only create one extent at a time
* on each DBRoot.
* This function can be used to initialize an entirely new extent, or
* to finish initializing an extent that has already been started.
* nBlocks controls how many 8192-byte blocks are to be written out.
* If bOptExtension is set then method first checks config for
* DBRootX.Prealloc. If it is disabled then it skips disk space
* preallocation.
* PARAMETERS:
* pFile (in) - IDBDataFile* of column segment file to be written to
* dbRoot (in) - DBRoot of pFile
* nBlocks (in) - number of blocks to be written for an extent
* blockHdrInit(in) - data used to initialize each block
* blockHdrInitSize(in) - number of bytes in blockHdrInit
* bExpandExtent (in) - Expand existing extent, or initialize a new one
* bOptExtension(in) - skip full extent preallocation.
* RETURN:
* returns ERR_FILE_WRITE if an error occurs,
* else returns NO_ERROR.
***********************************************************/
int FileOp::initDctnryExtent(
IDBDataFile* pFile,
uint16_t dbRoot,
int nBlocks,
unsigned char* blockHdrInit,
int blockHdrInitSize,
bool bExpandExtent,
bool bOptExtension )
{
// @bug5769 Don't initialize extents or truncate db files on HDFS
if (idbdatafile::IDBPolicy::useHdfs())
{
if (m_compressionType)
updateDctnryExtent(pFile, nBlocks);
// Synchronize to avoid write buffer pile up too much, which could cause
// controllernode to timeout later when it needs to save a snapshot.
pFile->flush();
}
else
{
// Create vector of mutexes used to serialize extent access per DBRoot
initDbRootExtentMutexes( );
// MCOL-498 Skip the huge preallocations if the option is set
// for the dbroot. This check is skiped for abbreviated extent.
// IMO it is better to check bool then to call a function.
// CS uses non-compressed dict files for its system catalog so
// CS doesn't optimize non-compressed dict creation.
if ( bOptExtension )
{
bOptExtension = (idbdatafile::IDBPolicy::PreallocSpace(dbRoot)
&& m_compressionType) ? bOptExtension : false;
}
// Reduce number of blocks allocated for abbreviated extents thus
// CS writes less when creates a new table. This couldn't be zero
// b/c Snappy compressed file format doesn't tolerate empty files.
int realNBlocks = ( bOptExtension && nBlocks <= MAX_INITIAL_EXTENT_BLOCKS_TO_DISK ) ? 1 : nBlocks;
// Determine the number of blocks in each call to fwrite(), and the
// number of fwrite() calls to make, based on this. In other words,
// we put a cap on the "writeSize" so that we don't allocate and write
// an entire extent at once for the 64M row extents. If we are
// expanding an abbreviated 64M extent, we may not have an even
// multiple of MAX_NBLOCKS to write; remWriteSize is the number of
// blocks above and beyond loopCount*MAX_NBLOCKS.
int writeSize = realNBlocks * BYTE_PER_BLOCK; // 1M and 8M row extent size
int loopCount = 1;
int remWriteSize = 0;
if (realNBlocks > MAX_NBLOCKS) // 64M row extent size
{
writeSize = MAX_NBLOCKS * BYTE_PER_BLOCK;
loopCount = realNBlocks / MAX_NBLOCKS;
remWriteSize = realNBlocks - (loopCount * MAX_NBLOCKS);
}
// Allocate a buffer, initialize it, and use it to create the extent
idbassert(dbRoot > 0);
#ifdef PROFILE
if (bExpandExtent)
Stats::startParseEvent(WE_STATS_WAIT_TO_EXPAND_DCT_EXTENT);
else
Stats::startParseEvent(WE_STATS_WAIT_TO_CREATE_DCT_EXTENT);
#endif
boost::mutex::scoped_lock lk(*m_DbRootAddExtentMutexes[dbRoot]);
#ifdef PROFILE
if (bExpandExtent)
Stats::stopParseEvent(WE_STATS_WAIT_TO_EXPAND_DCT_EXTENT);
else
Stats::stopParseEvent(WE_STATS_WAIT_TO_CREATE_DCT_EXTENT);
#endif
// Skip space preallocation if configured so
// fallback to sequential write otherwise.
// Couldn't avoid preallocation for full extents,
// e.g. ADD COLUMN DDL b/c CS has to fill the file
// with empty magics.
if ( !bOptExtension )
{
// Allocate buffer, and store in scoped_array to insure it's deletion.
// Create scope {...} to manage deletion of writeBuf.
{
#ifdef PROFILE
Stats::startParseEvent(WE_STATS_INIT_DCT_EXTENT);
#endif
unsigned char* writeBuf = new unsigned char[writeSize];
boost::scoped_array<unsigned char> writeBufPtr( writeBuf );
memset(writeBuf, 0, writeSize);
for (int i = 0; i < realNBlocks; i++)
{
memcpy( writeBuf + (i * BYTE_PER_BLOCK),
blockHdrInit,
blockHdrInitSize );
}
#ifdef PROFILE
Stats::stopParseEvent(WE_STATS_INIT_DCT_EXTENT);
if (bExpandExtent)
Stats::startParseEvent(WE_STATS_EXPAND_DCT_EXTENT);
else
Stats::startParseEvent(WE_STATS_CREATE_DCT_EXTENT);
#endif
if (remWriteSize > 0)
{
if (pFile->write( writeBuf, remWriteSize ) != remWriteSize)
{
return ERR_FILE_WRITE;
}
}
for (int j = 0; j < loopCount; j++)
{
if (pFile->write( writeBuf, writeSize ) != writeSize)
{
return ERR_FILE_WRITE;
}
}
// CS doesn't account flush timings.
#ifdef PROFILE
if (bExpandExtent)
Stats::stopParseEvent(WE_STATS_EXPAND_DCT_EXTENT);
else
Stats::stopParseEvent(WE_STATS_CREATE_DCT_EXTENT);
#endif
}
} // preallocation fallback end
// MCOL-498 CS has to set a number of blocs in the chunk header
if ( m_compressionType )
{
updateDctnryExtent(pFile, nBlocks);
}
pFile->flush();
}
return NO_ERROR;
}
/***********************************************************
* DESCRIPTION:
* Create a vector containing the mutexes used to serialize
* extent creation per DBRoot. Serializing extent creation
* helps to prevent disk fragmentation.
***********************************************************/
/* static */
void FileOp::initDbRootExtentMutexes( )
{
boost::mutex::scoped_lock lk(m_createDbRootMutexes);
if ( m_DbRootAddExtentMutexes.size() == 0 )
{
std::vector<uint16_t> rootIds;
Config::getRootIdList( rootIds );
for (size_t i = 0; i < rootIds.size(); i++)
{
boost::mutex* pM = new boost::mutex;
m_DbRootAddExtentMutexes[ rootIds[i] ] = pM;
}
}
}
/***********************************************************
* DESCRIPTION:
* Cleans up memory allocated to the DBRoot extent mutexes. Calling
* this function is not necessary, but it is provided for completeness,
* to complement initDbRootExtentMutexes(), and to provide a way to
* free up memory at the end of program execution.
***********************************************************/
/* static */
void FileOp::removeDbRootExtentMutexes( )
{
boost::mutex::scoped_lock lk(m_createDbRootMutexes);
std::map<int, boost::mutex*>::iterator k = m_DbRootAddExtentMutexes.begin();
while (k != m_DbRootAddExtentMutexes.end() )
{
delete k->second;
++k;
}
}
/***********************************************************
* DESCRIPTION:
* Write out (reinitialize) a partial extent in a column file.
* A mutex is not used to prevent contention between threads,
* because the extent should already be in place on disk; so
* disk fragmentation is not an issue.
* PARAMETERS:
* pFile (in) - IDBDataFile* of column segment file to be written to
* startOffset(in)-file offset where we are to begin writing blocks
* nBlocks (in) - number of blocks to be written to the extent
* emptyVal(in) - empty value to be used for column data values
* width (in) - width of the applicable column
* RETURN:
* returns ERR_FILE_WRITE if an error occurs,
* else returns NO_ERROR.
***********************************************************/
int FileOp::reInitPartialColumnExtent(
IDBDataFile* pFile,
long long startOffset,
int nBlocks,
uint64_t emptyVal,
int width )
{
int rc = setFileOffset( pFile, startOffset, SEEK_SET );
if (rc != NO_ERROR)
return rc;
if (nBlocks == 0)
return NO_ERROR;
// Determine the number of blocks in each call to fwrite(), and the
// number of fwrite() calls to make, based on this. In other words,
// we put a cap on the "writeSize" so that we don't allocate and write
// an entire extent at once for the 64M row extents.
int writeSize = nBlocks * BYTE_PER_BLOCK; // 1M and 8M row extent size
int loopCount = 0;
int remainderSize = writeSize;
if (nBlocks > MAX_NBLOCKS) // 64M row extent size
{
writeSize = MAX_NBLOCKS * BYTE_PER_BLOCK;
loopCount = nBlocks / MAX_NBLOCKS;
remainderSize = nBlocks - (loopCount * MAX_NBLOCKS);
}
// Allocate a buffer, initialize it, and use it to initialize the extent
// Store in scoped_array to insure it's deletion.
// Create scope {...} to manage deletion of writeBuf.
{
unsigned char* writeBuf = new unsigned char[writeSize];
boost::scoped_array<unsigned char> writeBufPtr( writeBuf );
setEmptyBuf( writeBuf, writeSize, emptyVal, width );
for (int j = 0; j < loopCount; j++)
{
if (pFile->write( writeBuf, writeSize ) != writeSize)
{
return ERR_FILE_WRITE;
}
}
if (remainderSize > 0)
{
if (pFile->write( writeBuf, remainderSize ) != remainderSize)
{
return ERR_FILE_WRITE;
}
}
}
// Synchronize here to avoid write buffer pile up too much, which could
// cause controllernode to timeout later when it needs to save a snapshot.
pFile->flush();
return NO_ERROR;
}
/***********************************************************
* DESCRIPTION:
* Write out (reinitialize) a partial extent in a dictionary store file.
* A mutex is not used to prevent contention between threads,
* because the extent should already be in place on disk; so
* disk fragmentation is not an issue.
* PARAMETERS:
* pFile (in) - IDBDataFile* of column segment file to be written to
* startOffset(in)-file offset where we are to begin writing blocks
* nBlocks (in) - number of blocks to be written to the extent
* blockHdrInit(in) - data used to initialize each block
* blockHdrInitSize(in) - number of bytes in blockHdrInit
* RETURN:
* returns ERR_FILE_WRITE if an error occurs,
* else returns NO_ERROR.
***********************************************************/
int FileOp::reInitPartialDctnryExtent(
IDBDataFile* pFile,
long long startOffset,
int nBlocks,
unsigned char* blockHdrInit,
int blockHdrInitSize )
{
int rc = setFileOffset( pFile, startOffset, SEEK_SET );
if (rc != NO_ERROR)
return rc;
if (nBlocks == 0)
return NO_ERROR;
// Determine the number of blocks in each call to fwrite(), and the
// number of fwrite() calls to make, based on this. In other words,
// we put a cap on the "writeSize" so that we don't allocate and write
// an entire extent at once for the 64M row extents.
int writeSize = nBlocks * BYTE_PER_BLOCK; // 1M and 8M row extent size
int loopCount = 0;
int remainderSize = writeSize;
if (nBlocks > MAX_NBLOCKS) // 64M row extent size
{
writeSize = MAX_NBLOCKS * BYTE_PER_BLOCK;
loopCount = nBlocks / MAX_NBLOCKS;
remainderSize = nBlocks - (loopCount * MAX_NBLOCKS);
nBlocks = MAX_NBLOCKS;
}
// Allocate a buffer, initialize it, and use it to initialize the extent
// Store in scoped_array to insure it's deletion.
// Create scope {...} to manage deletion of writeBuf.
{
unsigned char* writeBuf = new unsigned char[writeSize];
boost::scoped_array<unsigned char> writeBufPtr( writeBuf );
memset(writeBuf, 0, writeSize);
for (int i = 0; i < nBlocks; i++)
{
memcpy( writeBuf + (i * BYTE_PER_BLOCK),
blockHdrInit,
blockHdrInitSize );
}
for (int j = 0; j < loopCount; j++)
{
if (pFile->write( writeBuf, writeSize ) != writeSize)
{
return ERR_FILE_WRITE;
}
}
if (remainderSize > 0)
{
if (pFile->write( writeBuf, remainderSize ) != remainderSize)
{
return ERR_FILE_WRITE;
}
}
}
// Synchronize here to avoid write buffer pile up too much, which could
// cause controllernode to timeout later when it needs to save a snapshot.
pFile->flush();
return NO_ERROR;
}
/***********************************************************
* DESCRIPTION:
* PARAMETERS:
* pFile - file handle
* fileSize (out) - file size in bytes
* RETURN:
* error code
***********************************************************/
int FileOp::getFileSize( IDBDataFile* pFile, long long& fileSize ) const
{
fileSize = 0;
if ( pFile == NULL )
return ERR_FILE_NULL;
fileSize = pFile->size();
if ( fileSize < 0 )
{
fileSize = 0;
return ERR_FILE_STAT;
}
return NO_ERROR;
}
/***********************************************************
* DESCRIPTION:
* Get file size using file id
* PARAMETERS:
* fid - column OID
* dbroot - DBRoot of applicable segment file
* partition - partition of applicable segment file
* segment - segment of applicable segment file
* fileSize (out) - current file size for requested segment file
* RETURN:
* NO_ERROR if okay, else an error return code.
***********************************************************/
int FileOp::getFileSize( FID fid, uint16_t dbRoot,
uint32_t partition, uint16_t segment,
long long& fileSize ) const
{
fileSize = 0;
char fileName[FILE_NAME_SIZE];
RETURN_ON_ERROR( getFileName(fid, fileName,
dbRoot, partition, segment) );
fileSize = IDBPolicy::size( fileName );
if ( fileSize < 0 )
{
fileSize = 0;
return ERR_FILE_STAT;
}
return NO_ERROR;
}
/***********************************************************
* DESCRIPTION:
* Check whether it is a directory
* PARAMETERS:
* dirName - directory name
* RETURN:
* true if it is, false otherwise
***********************************************************/
bool FileOp::isDir( const char* dirName ) const
{
return IDBPolicy::isDir( dirName );
}
/***********************************************************
* DESCRIPTION:
* Convert an oid to a filename
* PARAMETERS:
* fid - fid
* fullFileName - file name
* bCreateDir - whether need to create a directory
* dbRoot - DBRoot where file is to be located; 1->DBRoot1,
* 2->DBRoot2, etc. If bCreateDir is false, meaning we
* are not creating the file but only searching for an
* existing file, then dbRoot can be 0, and oid2FileName
* will search all the DBRoots for the applicable filename.
* partition - Partition number to be used in filepath subdirectory
* segment - Segment number to be used in filename
* RETURN:
* NO_ERROR if success, other if fail
***********************************************************/
int FileOp::oid2FileName( FID fid,
char* fullFileName,
bool bCreateDir,
uint16_t dbRoot,
uint32_t partition,
uint16_t segment) const
{
#ifdef SHARED_NOTHING_DEMO_2
if (fid >= 10000)
{
char root[FILE_NAME_SIZE];
Config::getSharedNothingRoot(root);
sprintf(fullFileName, "%s/FILE%d", root, fid);
return NO_ERROR;
}
#endif
// Need this stub to use ColumnOp::writeRow in the unit tests
#ifdef WITH_UNIT_TESTS
if (fid == 42)
{
sprintf(fullFileName, "./versionbuffer");
return NO_ERROR;
}
#endif
/* If is a version buffer file, the format is different. */
if (fid < 1000)
{
/* Get the dbroot #
* Get the root of that dbroot
* Add "/versionbuffer.cdf"
*/
BRM::DBRM dbrm;
int _dbroot = dbrm.getDBRootOfVBOID(fid);
if (_dbroot < 0)
return ERR_INVALID_VBOID;
snprintf(fullFileName, FILE_NAME_SIZE,
"%s/versionbuffer.cdf", Config::getDBRootByNum(_dbroot).c_str());
return NO_ERROR;
}
//Get hashed part of the filename. This is the tail-end of the filename path,
// excluding the DBRoot.
char tempFileName[FILE_NAME_SIZE];
char dbDir[MAX_DB_DIR_LEVEL][MAX_DB_DIR_NAME_SIZE];
RETURN_ON_ERROR((Convertor::oid2FileName(
fid, tempFileName, dbDir, partition, segment)));
// see if file exists in specified DBRoot; return if found
if (dbRoot > 0)
{
sprintf(fullFileName, "%s/%s", Config::getDBRootByNum(dbRoot).c_str(),
tempFileName);
//std::cout << "oid2FileName() OID: " << fid <<
// " searching for file: " << fullFileName <<std::endl;
// if (access(fullFileName, R_OK) == 0) return NO_ERROR;
//@Bug 5397
if (IDBPolicy::exists( fullFileName ))
return NO_ERROR;
//file wasn't found, user doesn't want dirs to be created, we're done
if (!bCreateDir)
return NO_ERROR;
//std::cout << "oid2FileName() OID: " << fid <<
// " creating file: " << fullFileName <<std::endl;
}
else
{
//Now try to find the file in each of the DBRoots.
std::vector<std::string> dbRootPathList;
Config::getDBRootPathList( dbRootPathList );
for (unsigned i = 0; i < dbRootPathList.size(); i++)
{
sprintf(fullFileName, "%s/%s", dbRootPathList[i].c_str(),
tempFileName);
//found it, nothing more to do, return
//if (access(fullFileName, R_OK) == 0) return NO_ERROR;
//@Bug 5397
if (IDBPolicy::exists( fullFileName ))
return NO_ERROR;
}
//file wasn't found, user didn't specify DBRoot so we can't create
return ERR_FILE_NOT_EXIST;
}
/*
char dirName[FILE_NAME_SIZE];
sprintf( dirName, "%s/%s", Config::getDBRootByNum(dbRoot).c_str(),
dbDir[0] );
if( !isDir( dirName ) )
RETURN_ON_ERROR( createDir( dirName ));
sprintf( dirName, "%s/%s", dirName, dbDir[1] );
if( !isDir( dirName ) )
RETURN_ON_ERROR( createDir( dirName ));
sprintf( dirName, "%s/%s", dirName, dbDir[2] );
if( !isDir( dirName ) )
RETURN_ON_ERROR( createDir( dirName ));
sprintf( dirName, "%s/%s", dirName, dbDir[3] );
if( !isDir( dirName ) )
RETURN_ON_ERROR( createDir( dirName ));
sprintf( dirName, "%s/%s", dirName, dbDir[4] );
if( !isDir( dirName ) )
RETURN_ON_ERROR( createDir( dirName ));
*/
std::stringstream aDirName;
aDirName << Config::getDBRootByNum(dbRoot).c_str() << "/" << dbDir[0];
if (!isDir((aDirName.str()).c_str()))
RETURN_ON_ERROR( createDir((aDirName.str()).c_str()) );
aDirName << "/" << dbDir[1];
if (!isDir(aDirName.str().c_str()))
RETURN_ON_ERROR( createDir(aDirName.str().c_str()) );
aDirName << "/" << dbDir[2];
if (!isDir(aDirName.str().c_str()))
RETURN_ON_ERROR( createDir(aDirName.str().c_str()) );
aDirName << "/" << dbDir[3];
if (!isDir(aDirName.str().c_str()))
RETURN_ON_ERROR( createDir(aDirName.str().c_str()) );
aDirName << "/" << dbDir[4];
if (!isDir(aDirName.str().c_str()))
RETURN_ON_ERROR( createDir(aDirName.str().c_str()) );
return NO_ERROR;
}
/***********************************************************
* DESCRIPTION:
* Search for directory path associated with specified OID.
* If the OID is a version buffer file, it returns the whole
* filename.
* PARAMETERS:
* fid - (in) OID to search for
* pFile - (out) OID directory path (including DBRoot) that is found
* RETURN:
* NO_ERROR if OID dir path found, else returns ERR_FILE_NOT_EXIST
***********************************************************/
int FileOp::oid2DirName( FID fid, char* oidDirName ) const
{
char tempFileName[FILE_NAME_SIZE];
char dbDir[MAX_DB_DIR_LEVEL][MAX_DB_DIR_NAME_SIZE];
/* If is a version buffer file, the format is different. */
if (fid < 1000)
{
/* Get the dbroot #
* Get the root of that dbroot
*/
BRM::DBRM dbrm;
int _dbroot = dbrm.getDBRootOfVBOID(fid);
if (_dbroot < 0)
return ERR_INVALID_VBOID;
snprintf(oidDirName, FILE_NAME_SIZE, "%s",
Config::getDBRootByNum(_dbroot).c_str());
return NO_ERROR;
}
RETURN_ON_ERROR((Convertor::oid2FileName(
fid, tempFileName, dbDir, 0, 0)));
//Now try to find the directory in each of the DBRoots.
std::vector<std::string> dbRootPathList;
Config::getDBRootPathList( dbRootPathList );
for (unsigned i = 0; i < dbRootPathList.size(); i++)
{
sprintf(oidDirName, "%s/%s/%s/%s/%s",
dbRootPathList[i].c_str(),
dbDir[0], dbDir[1], dbDir[2], dbDir[3]);
//found it, nothing more to do, return
//@Bug 5397. use the new way to check
if (IDBPolicy::exists( oidDirName ))
return NO_ERROR;
}
return ERR_FILE_NOT_EXIST;
}
/***********************************************************
* DESCRIPTION:
* Construct directory path for the specified fid (OID), DBRoot, and
* partition number. Directory path need not exist, nor is it created.
* PARAMETERS:
* fid - (in) OID of interest
* dbRoot - (in) DBRoot of interest
* partition - (in) partition of interest
* dirName - (out) constructed directory path
* RETURN:
* NO_ERROR if path is successfully constructed.
***********************************************************/
int FileOp::getDirName( FID fid, uint16_t dbRoot,
uint32_t partition,
std::string& dirName) const
{
char tempFileName[FILE_NAME_SIZE];
char dbDir[MAX_DB_DIR_LEVEL][MAX_DB_DIR_NAME_SIZE];
RETURN_ON_ERROR((Convertor::oid2FileName(
fid, tempFileName, dbDir, partition, 0)));
std::string rootPath = Config::getDBRootByNum( dbRoot );
std::ostringstream oss;
oss << rootPath << '/' <<
dbDir[0] << '/' <<
dbDir[1] << '/' <<
dbDir[2] << '/' <<
dbDir[3] << '/' <<
dbDir[4];
dirName = oss.str();
return NO_ERROR;
}
/***********************************************************
* DESCRIPTION:
* Open a file
* PARAMETERS:
* fileName - file name with complete path
* pFile - file handle
* RETURN:
* true if exists, false otherwise
***********************************************************/
// @bug 5572 - HDFS usage: add *.tmp file backup flag
IDBDataFile* FileOp::openFile( const char* fileName,
const char* mode,
const int ioColSize,
bool useTmpSuffix ) const
{
IDBDataFile* pFile;
errno = 0;
unsigned opts;
if (ioColSize > 0)
opts = IDBDataFile::USE_VBUF;
else
opts = IDBDataFile::USE_NOVBUF;
if ((useTmpSuffix) && idbdatafile::IDBPolicy::useHdfs())
opts |= IDBDataFile::USE_TMPFILE;
pFile = IDBDataFile::open(
IDBPolicy::getType( fileName, IDBPolicy::WRITEENG ),
fileName,
mode,
opts,
ioColSize );
if (pFile == NULL)
{
int errRc = errno;
std::ostringstream oss;
std::string errnoMsg;
Convertor::mapErrnoToString(errRc, errnoMsg);
oss << "FileOp::openFile(): fopen(" << fileName <<
", " << mode << "): errno = " << errRc <<
": " << errnoMsg;
logging::Message::Args args;
args.add(oss.str());
SimpleSysLog::instance()->logMsg(args,
logging::LOG_TYPE_CRITICAL,
logging::M0006);
SimpleSysLog::instance()->logMsg(args,
logging::LOG_TYPE_ERROR,
logging::M0006);
}
return pFile;
}
// @bug 5572 - HDFS usage: add *.tmp file backup flag
IDBDataFile* FileOp::openFile( FID fid,
uint16_t dbRoot,
uint32_t partition,
uint16_t segment,
std::string& segFile,
const char* mode, int ioColSize,
bool useTmpSuffix ) const
{
char fileName[FILE_NAME_SIZE];
int rc;
//fid2FileName( fileName, fid );
RETURN_ON_WE_ERROR( ( rc = getFileName( fid, fileName,
dbRoot, partition, segment ) ), NULL );
// disable buffering for versionbuffer file
if (fid < 1000)
ioColSize = 0;
IDBDataFile* pF = openFile( fileName, mode, ioColSize, useTmpSuffix );
segFile = fileName;
return pF;
}
/***********************************************************
* DESCRIPTION:
* Read a portion of file to a buffer
* PARAMETERS:
* pFile - file handle
* readBuf - read buffer
* readSize - the size to read
* RETURN:
* NO_ERROR if success
* ERR_FILE_NULL if file handle is NULL
* ERR_FILE_READ if something wrong in reading the file
***********************************************************/
int FileOp::readFile( IDBDataFile* pFile, unsigned char* readBuf,
int readSize ) const
{
if ( pFile != NULL )
{
if ( pFile->read( readBuf, readSize ) != readSize )
return ERR_FILE_READ;
}
else
return ERR_FILE_NULL;
return NO_ERROR;
}
/***********************************************************
* Reads contents of headers from "pFile" and stores into "hdrs".
***********************************************************/
int FileOp::readHeaders( IDBDataFile* pFile, char* hdrs ) const
{
RETURN_ON_ERROR( setFileOffset(pFile, 0) );
RETURN_ON_ERROR( readFile( pFile, reinterpret_cast<unsigned char*>(hdrs),
(IDBCompressInterface::HDR_BUF_LEN * 2) ) );
IDBCompressInterface compressor;
int rc = compressor.verifyHdr( hdrs );
if (rc != 0)
{
return ERR_COMP_VERIFY_HDRS;
}
return NO_ERROR;
}
/***********************************************************
* Reads contents of headers from "pFile" and stores into "hdr1" and "hdr2".
***********************************************************/
int FileOp::readHeaders( IDBDataFile* pFile, char* hdr1, char* hdr2 ) const
{
unsigned char* hdrPtr = reinterpret_cast<unsigned char*>(hdr1);
RETURN_ON_ERROR( setFileOffset(pFile, 0) );
RETURN_ON_ERROR( readFile( pFile, hdrPtr,
IDBCompressInterface::HDR_BUF_LEN ));
IDBCompressInterface compressor;
int ptrSecSize = compressor.getHdrSize(hdrPtr) -
IDBCompressInterface::HDR_BUF_LEN;
return readFile( pFile, reinterpret_cast<unsigned char*>(hdr2),
ptrSecSize );
}
/***********************************************************
* DESCRIPTION: No change Old signature
* Read a portion of file to a buffer
* PARAMETERS:
* pFile - file handle
* offset - file offset
* origin - can be SEEK_SET, or SEEK_CUR, or SEEK_END
* RETURN:
* NO_ERROR if success
* ERR_FILE_NULL if file handle is NULL
* ERR_FILE_SEEK if something wrong in setting the position
***********************************************************/
int FileOp::setFileOffset( IDBDataFile* pFile, long long offset, int origin ) const
{
int rc;
long long fboOffset = offset; // workaround solution to pass leakcheck error
if ( pFile == NULL )
return ERR_FILE_NULL;
if ( offset < 0 )
return ERR_FILE_FBO_NEG;
rc = pFile->seek( fboOffset, origin );
if (rc)
return ERR_FILE_SEEK;
return NO_ERROR;
}
/***********************************************************
* DESCRIPTION:
* Read a portion of file to a buffer
* PARAMETERS:
* pFile - file handle
* offset - file offset
* origin - can be SEEK_SET, or SEEK_CUR, or SEEK_END
* RETURN:
* NO_ERROR if success
* ERR_FILE_NULL if file handle is NULL
* ERR_FILE_SEEK if something wrong in setting the position
***********************************************************/
int FileOp::setFileOffsetBlock( IDBDataFile* pFile, uint64_t lbid, int origin) const
{
long long fboOffset = 0;
int fbo = 0;
// only when fboFlag is false, we get in here
uint16_t dbRoot;
uint32_t partition;
uint16_t segment;
RETURN_ON_ERROR( BRMWrapper::getInstance()->getFboOffset(
lbid, dbRoot, partition, segment, fbo ) );
fboOffset = ((long long)fbo) * (long)BYTE_PER_BLOCK;
return setFileOffset( pFile, fboOffset, origin );
}
/***********************************************************
* DESCRIPTION:
* Truncate file to the specified size.
* PARAMETERS:
* pFile - file handle
* fileSize - size of file in bytes.
* RETURN:
* NO_ERROR if success
* ERR_FILE_NULL if file handle is NULL
* ERR_FILE_SEEK if something wrong in setting the position
***********************************************************/
int FileOp::truncateFile( IDBDataFile* pFile, long long fileSize ) const
{
if ( pFile == NULL )
return ERR_FILE_NULL;
if ( pFile->truncate( fileSize ) != 0 )
return ERR_FILE_TRUNCATE;
return NO_ERROR;
}
/***********************************************************
* DESCRIPTION:
* Write a buffer to a file at at current location
* PARAMETERS:
* pFile - file handle
* writeBuf - write buffer
* writeSize - the write size
* RETURN:
* NO_ERROR if success
* ERR_FILE_NULL if file handle is NULL
* ERR_FILE_WRITE if something wrong in writing to the file
***********************************************************/
int FileOp::writeFile( IDBDataFile* pFile, const unsigned char* writeBuf,
int writeSize ) const
{
if ( pFile != NULL )
{
if ( pFile->write( writeBuf, writeSize ) != writeSize )
return ERR_FILE_WRITE;
}
else
return ERR_FILE_NULL;
return NO_ERROR;
}
/***********************************************************
* DESCRIPTION:
* Determine whether the applicable filesystem has room to add the
* specified number of blocks (where the blocks contain BYTE_PER_BLOCK
* bytes).
* PARAMETERS:
* fileName - file whose file system is to be checked. Does not have to
* be a complete file name. Dir path is sufficient.
* nBlock - number of 8192-byte blocks to be added
* RETURN:
* true if there is room for the blocks or it can not be determined;
* false if file system usage would exceed allowable threshold
***********************************************************/
bool FileOp::isDiskSpaceAvail(const std::string& fileName, int nBlocks) const
{
bool bSpaceAvail = true;
unsigned maxDiskUsage = Config::getMaxFileSystemDiskUsage();
if (maxDiskUsage < 100) // 100% means to disable the check
{
#ifdef _MSC_VER
ULARGE_INTEGER freeBytesAvail;
ULARGE_INTEGER totalBytesAvail;
if (GetDiskFreeSpaceEx(fileName.c_str(), &freeBytesAvail,
&totalBytesAvail, 0) != 0)
{
double avail = (double)freeBytesAvail.QuadPart;
double total = (double)totalBytesAvail.QuadPart;
double wanted = (double)nBlocks * (double)BYTE_PER_BLOCK;
//If we want more than there is, return an error
if (wanted > avail)
bSpaceAvail = false;
//If the remaining bytes would be too few, return an error
else if ((total - (avail - wanted)) / total * 100.0 > maxDiskUsage)
bSpaceAvail = false;
}
#else
struct statfs fStats;
int rc = statfs( fileName.c_str(), &fStats );
if (rc == 0)
{
double totalBlocks = fStats.f_blocks;
double blksToAlloc = (double)(nBlocks * BYTE_PER_BLOCK) /
fStats.f_bsize;
double freeBlocks = fStats.f_bavail - blksToAlloc;
if ((((totalBlocks - freeBlocks) / totalBlocks) * 100.0) > maxDiskUsage)
bSpaceAvail = false;
//std::cout << "isDiskSpaceAvail" <<
//": totalBlocks: " << totalBlocks <<
//"; blkSize: " << fStats.f_bsize <<
//"; nBlocks: " << nBlocks <<
//"; freeBlks: " << freeBlocks <<
//"; pctUsed: " << (((totalBlocks-freeBlocks)/totalBlocks)*100.0) <<
//"; bAvail: " << bSpaceAvail << std::endl;
}
#endif
}
return bSpaceAvail;
}
//------------------------------------------------------------------------------
// Virtual default functions follow; placeholders for derived class if they want
// to override (see ColumnOpCompress1 and DctnryCompress1 in /wrapper).
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
// Expand current abbreviated extent to a full extent for column segment file
// associated with pFile. Function leaves fileposition at end of file after
// extent is expanded.
//------------------------------------------------------------------------------
int FileOp::expandAbbrevColumnExtent(
IDBDataFile* pFile, // FILE ptr to file where abbrev extent is to be expanded
uint16_t dbRoot, // The DBRoot of the file with the abbreviated extent
uint64_t emptyVal,// Empty value to be used in expanding the extent
int width ) // Width of the column (in bytes)
{
// Based on extent size, see how many blocks to add to fill the extent
int blksToAdd = ( ((int)BRMWrapper::getInstance()->getExtentRows() -
INITIAL_EXTENT_ROWS_TO_DISK) / BYTE_PER_BLOCK ) * width;
// Make sure there is enough disk space to expand the extent.
RETURN_ON_ERROR( setFileOffset( pFile, 0, SEEK_END ) );
// TODO-will have to address this DiskSpaceAvail check at some point
if ( !isDiskSpaceAvail(Config::getDBRootByNum(dbRoot), blksToAdd) )
{
return ERR_FILE_DISK_SPACE;
}
// Add blocks to turn the abbreviated extent into a full extent.
int rc = FileOp::initColumnExtent(pFile, dbRoot, blksToAdd, emptyVal, width,
false, // existing file
true, // expand existing extent
false, // n/a since not adding new extent
true); // optimize segment file extension
return rc;
}
void FileOp::setTransId(const TxnID& transId)
{
m_transId = transId;
}
void FileOp::setBulkFlag(bool isBulkLoad)
{
m_isBulk = isBulkLoad;
}
int FileOp::flushFile(int rc, std::map<FID, FID>& oids)
{
return NO_ERROR;
}
int FileOp::updateColumnExtent(IDBDataFile* pFile, int nBlocks)
{
return NO_ERROR;
}
int FileOp::updateDctnryExtent(IDBDataFile* pFile, int nBlocks)
{
return NO_ERROR;
}
void FileOp::setFixFlag(bool isFix)
{
m_isFix = isFix;
}
} //end of namespace
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