You've already forked mariadb-columnstore-engine
mirror of
https://github.com/mariadb-corporation/mariadb-columnstore-engine.git
synced 2025-10-30 07:25:34 +03:00
523 lines
20 KiB
C++
523 lines
20 KiB
C++
/* 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_dbrootextenttracker.cpp 4631 2013-05-02 15:21:09Z dcathey $
|
|
*/
|
|
#include "we_dbrootextenttracker.h"
|
|
|
|
#include <algorithm>
|
|
#include <sstream>
|
|
|
|
#include "we_brm.h"
|
|
#include "we_config.h"
|
|
#include "we_log.h"
|
|
|
|
namespace
|
|
{
|
|
const char* stateStrings[] = {"initState", "PartialExtent", "EmptyDbRoot", "ExtentBoundary", "OutOfService"};
|
|
}
|
|
|
|
namespace WriteEngine
|
|
{
|
|
//------------------------------------------------------------------------------
|
|
// DBRootExtentInfo constructor
|
|
//------------------------------------------------------------------------------
|
|
DBRootExtentInfo::DBRootExtentInfo(uint16_t dbRoot, uint32_t partition, uint16_t segment,
|
|
BRM::LBID_t startLbid, HWM localHwm, uint64_t dbrootTotalBlocks,
|
|
DBRootExtentInfoState state)
|
|
: fPartition(partition)
|
|
, fDbRoot(dbRoot)
|
|
, fSegment(segment)
|
|
, fStartLbid(startLbid)
|
|
, fLocalHwm(localHwm)
|
|
, fDBRootTotalBlocks(dbrootTotalBlocks)
|
|
, fState(state)
|
|
{
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
// LessThan operator used to sort DBRootExtentInfo objects by DBRoot.
|
|
//------------------------------------------------------------------------------
|
|
bool DBRootExtentInfo::operator<(const DBRootExtentInfo& entry) const
|
|
{
|
|
if (fDbRoot < entry.fDbRoot)
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
// DBRootExtentTracker constructor
|
|
//
|
|
// Mutex lock not needed in this function as it is only called from main thread
|
|
// before processing threads are spawned.
|
|
//------------------------------------------------------------------------------
|
|
DBRootExtentTracker::DBRootExtentTracker(OID oid, const std::vector<int>& colWidths,
|
|
const std::vector<BRM::EmDbRootHWMInfo_v>& dbRootHWMInfoColVec,
|
|
unsigned int columnIdx, Log* logger)
|
|
: fOID(oid)
|
|
, fLog(logger)
|
|
, fCurrentDBRootIdx(-1)
|
|
, fEmptyOrDisabledPM(false)
|
|
, fEmptyPM(true)
|
|
, fDisabledHWM(false)
|
|
{
|
|
const BRM::EmDbRootHWMInfo_v& emDbRootHWMInfo = dbRootHWMInfoColVec[columnIdx];
|
|
int colWidth = colWidths[columnIdx];
|
|
|
|
fBlksPerExtent =
|
|
(long long)BRMWrapper::getInstance()->getExtentRows() * (long long)colWidth / (long long)BYTE_PER_BLOCK;
|
|
|
|
std::vector<bool> resetState;
|
|
|
|
for (unsigned int i = 0; i < emDbRootHWMInfo.size(); i++)
|
|
{
|
|
resetState.push_back(false);
|
|
DBRootExtentInfoState state = determineState(colWidths[columnIdx], emDbRootHWMInfo[i].localHWM,
|
|
emDbRootHWMInfo[i].totalBlocks, emDbRootHWMInfo[i].status);
|
|
|
|
// For a full extent...
|
|
// check to see if any of the column HWMs are partially full, in which
|
|
// case we consider all the columns for that DBRoot to be partially
|
|
// full. (This can happen if a table has columns with varying widths,
|
|
// as the HWM may be at the last extent block for a shorter column, and
|
|
// still have free blocks for wider columns.)
|
|
if (state == DBROOT_EXTENT_EXTENT_BOUNDARY)
|
|
{
|
|
for (unsigned int kCol = 0; kCol < dbRootHWMInfoColVec.size(); kCol++)
|
|
{
|
|
const BRM::EmDbRootHWMInfo_v& emDbRootHWMInfo2 = dbRootHWMInfoColVec[kCol];
|
|
DBRootExtentInfoState state2 =
|
|
determineState(colWidths[kCol], emDbRootHWMInfo2[i].localHWM, emDbRootHWMInfo2[i].totalBlocks,
|
|
emDbRootHWMInfo2[i].status);
|
|
|
|
if (state2 == DBROOT_EXTENT_PARTIAL_EXTENT)
|
|
{
|
|
state = DBROOT_EXTENT_PARTIAL_EXTENT;
|
|
resetState[resetState.size() - 1] = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
DBRootExtentInfo dbRootExtent(emDbRootHWMInfo[i].dbRoot, emDbRootHWMInfo[i].partitionNum,
|
|
emDbRootHWMInfo[i].segmentNum, emDbRootHWMInfo[i].startLbid,
|
|
emDbRootHWMInfo[i].localHWM, emDbRootHWMInfo[i].totalBlocks, state);
|
|
|
|
fDBRootExtentList.push_back(dbRootExtent);
|
|
}
|
|
|
|
std::sort(fDBRootExtentList.begin(), fDBRootExtentList.end());
|
|
|
|
if (fLog)
|
|
{
|
|
// Always log this info for now; may control with debug later
|
|
// if (fLog->isDebug(DEBUG_1))
|
|
{
|
|
std::ostringstream oss;
|
|
oss << "Starting DBRoot info for OID " << fOID;
|
|
|
|
for (unsigned int k = 0; k < fDBRootExtentList.size(); k++)
|
|
{
|
|
oss << std::endl;
|
|
oss << " DBRoot-" << fDBRootExtentList[k].fDbRoot
|
|
<< ", part/seg/hwm/LBID/totBlks/state: " << fDBRootExtentList[k].fPartition << "/"
|
|
<< fDBRootExtentList[k].fSegment << "/" << fDBRootExtentList[k].fLocalHwm << "/"
|
|
<< fDBRootExtentList[k].fStartLbid << "/" << fDBRootExtentList[k].fDBRootTotalBlocks << "/"
|
|
<< stateStrings[fDBRootExtentList[k].fState];
|
|
|
|
if (resetState[k])
|
|
oss << ".";
|
|
}
|
|
|
|
fLog->logMsg(oss.str(), MSGLVL_INFO2);
|
|
}
|
|
}
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Determines the state of the HWM extent (for a DBRoot); considering the
|
|
// current BRM status, HWM, and total block count for the DBRoot.
|
|
//------------------------------------------------------------------------------
|
|
DBRootExtentInfoState DBRootExtentTracker::determineState(int colWidth, HWM localHwm,
|
|
uint64_t dbRootTotalBlocks, int16_t status)
|
|
{
|
|
DBRootExtentInfoState extentState;
|
|
|
|
if (status == BRM::EXTENTOUTOFSERVICE)
|
|
{
|
|
extentState = DBROOT_EXTENT_OUT_OF_SERVICE;
|
|
}
|
|
else
|
|
{
|
|
if (dbRootTotalBlocks == 0)
|
|
{
|
|
extentState = DBROOT_EXTENT_EMPTY_DBROOT;
|
|
}
|
|
else
|
|
{
|
|
extentState = DBROOT_EXTENT_PARTIAL_EXTENT;
|
|
|
|
// See if local hwm is on an extent bndry,in which case the extent
|
|
// is full and we won't be adding rows to the current HWM extent;
|
|
// we will instead need to allocate a new extent in order to begin
|
|
// adding any rows.
|
|
long long nRows = ((long long)(localHwm + 1) * (long long)BYTE_PER_BLOCK) / (long long)colWidth;
|
|
long long nRem = nRows % BRMWrapper::getInstance()->getExtentRows();
|
|
|
|
if (nRem == 0)
|
|
{
|
|
extentState = DBROOT_EXTENT_EXTENT_BOUNDARY;
|
|
}
|
|
}
|
|
}
|
|
|
|
return extentState;
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Select the first segment file to add rows to for the local PM.
|
|
// Function will first try to find the HWM extent with the fewest blocks.
|
|
// If all the HWM extents are full, then we select the DBRoot/segment file
|
|
// with the fewest total overall blocks for that DBRoot.
|
|
// Return value is 0 upon success, else non zero if no eligible entries found.
|
|
//
|
|
// Mutex lock not needed in this function as it is only called from main thread
|
|
// before processing threads are spawned.
|
|
//------------------------------------------------------------------------------
|
|
int DBRootExtentTracker::selectFirstSegFile(DBRootExtentInfo& dbRootExtent, bool& bNoStartExtentOnThisPM,
|
|
bool& bEmptyPM, std::string& errMsg)
|
|
{
|
|
int startExtentIdx = -1;
|
|
int fewestLocalBlocksIdx = -1; // track HWM extent with fewest blocks
|
|
int fewestTotalBlocksIdx = -1; // track DBRoot with fewest total blocks
|
|
bNoStartExtentOnThisPM = false;
|
|
|
|
unsigned int fewestTotalBlks = UINT_MAX;
|
|
unsigned int fewestLocalBlks = UINT_MAX;
|
|
uint16_t fewestTotalBlkSegNum = USHRT_MAX;
|
|
uint16_t fewestLocalBlkSegNum = USHRT_MAX;
|
|
|
|
// Find DBRoot having HWM extent with fewest blocks. If all HWM extents
|
|
// are full (remblks=0), then fall-back on selecting the DBRoot with fewest
|
|
// total blks.
|
|
//
|
|
// Selecting HWM extent with fewest blocks should be straight forward, be-
|
|
// cause all the DBRoots on a PM should end on an extent boundary except
|
|
// for the current last extent. But if the user has moved a DBRoot, then
|
|
// we can end up with 2 partially filled HWM extents on 2 DBRoots, on the
|
|
// same PM. That's why we loop through the DBRoots to see if we have more
|
|
// than 1 partially filled HWM extent.
|
|
for (unsigned int iroot = 0; iroot < fDBRootExtentList.size(); iroot++)
|
|
{
|
|
// Skip over DBRoots which have no extents
|
|
if (fDBRootExtentList[iroot].fState == DBROOT_EXTENT_EMPTY_DBROOT)
|
|
continue;
|
|
|
|
fEmptyPM = false;
|
|
|
|
// Find DBRoot and segment file with most incomplete extent.
|
|
// Break a tie by selecting the lowest segment number.
|
|
long long remBlks = (long long)(fDBRootExtentList[iroot].fLocalHwm + 1) % fBlksPerExtent;
|
|
|
|
if (remBlks > 0)
|
|
{
|
|
if ((remBlks < fewestLocalBlks) ||
|
|
((remBlks == fewestLocalBlks) && (fDBRootExtentList[iroot].fSegment < fewestLocalBlkSegNum)))
|
|
{
|
|
fewestLocalBlocksIdx = iroot;
|
|
fewestLocalBlks = remBlks;
|
|
fewestLocalBlkSegNum = fDBRootExtentList[iroot].fSegment;
|
|
}
|
|
}
|
|
|
|
// Find DBRoot with fewest total of blocks.
|
|
// Break a tie by selecting the highest segment number.
|
|
if ((fDBRootExtentList[iroot].fDBRootTotalBlocks < fewestTotalBlks) ||
|
|
((fDBRootExtentList[iroot].fDBRootTotalBlocks == fewestTotalBlks) &&
|
|
(fDBRootExtentList[iroot].fSegment > fewestTotalBlkSegNum)))
|
|
{
|
|
fewestTotalBlocksIdx = iroot;
|
|
fewestTotalBlks = fDBRootExtentList[iroot].fDBRootTotalBlocks;
|
|
fewestTotalBlkSegNum = fDBRootExtentList[iroot].fSegment;
|
|
}
|
|
}
|
|
|
|
// Select HWM extent with fewest number of blocks;
|
|
// If chosen extent is disabled, then treat like an empty PM,
|
|
// meaning we have to allocate a new extent before adding any rows
|
|
if (fewestLocalBlocksIdx != -1)
|
|
{
|
|
startExtentIdx = fewestLocalBlocksIdx;
|
|
|
|
if (fDBRootExtentList[startExtentIdx].fState == DBROOT_EXTENT_OUT_OF_SERVICE)
|
|
{
|
|
fDisabledHWM = true;
|
|
}
|
|
}
|
|
|
|
// If the HWM on each DBRoot ends on an extent boundary, then
|
|
// select the DBRoot with the fewest total number of blocks;
|
|
// If chosen extent is disabled, then treat like an empty PM,
|
|
// meaning we have to allocate a new extent before adding any rows
|
|
else if (fewestTotalBlocksIdx != -1)
|
|
{
|
|
startExtentIdx = fewestTotalBlocksIdx;
|
|
|
|
if (fDBRootExtentList[startExtentIdx].fState == DBROOT_EXTENT_OUT_OF_SERVICE)
|
|
{
|
|
fDisabledHWM = true;
|
|
}
|
|
}
|
|
|
|
// PM with no extents (or all extents disabled), so select DBRoot/segment
|
|
// file from DBRoot list, where we will start inserting rows.
|
|
// Select lowest segment file number.
|
|
else
|
|
{
|
|
RETURN_ON_ERROR(selectFirstSegFileForEmptyPM(errMsg));
|
|
|
|
startExtentIdx = fCurrentDBRootIdx;
|
|
}
|
|
|
|
if ((fEmptyOrDisabledPM) || (fDisabledHWM))
|
|
bNoStartExtentOnThisPM = true;
|
|
|
|
bEmptyPM = fEmptyPM;
|
|
fCurrentDBRootIdx = startExtentIdx;
|
|
|
|
// Finish Initializing DBRootExtentList for empty DBRoots w/o any extents
|
|
initEmptyDBRoots();
|
|
|
|
logFirstDBRootSelection();
|
|
|
|
dbRootExtent = fDBRootExtentList[startExtentIdx];
|
|
fDBRootExtentList[startExtentIdx].fState = DBROOT_EXTENT_EXTENT_BOUNDARY;
|
|
|
|
return NO_ERROR;
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
// If we have encountered a PM with no extents (or all extent disabled), then
|
|
// this function can be called to determine the DBRoot to be used for the 1st
|
|
// extent for the applicable PM. First DBRoot for relevant PM is selected.
|
|
// At extent creation time, BRM will assign the segment number.
|
|
//
|
|
// Mutex lock not needed in this function as it is only called from main thread
|
|
// before processing threads are spawned.
|
|
//------------------------------------------------------------------------------
|
|
int DBRootExtentTracker::selectFirstSegFileForEmptyPM(std::string& /*errMsg*/)
|
|
{
|
|
fEmptyOrDisabledPM = true;
|
|
|
|
fCurrentDBRootIdx = 0; // Start with first DBRoot for this PM
|
|
|
|
// Always start empty PM with partition number 0. If the DBRoot has a HWM
|
|
// extent that is disabled, then BRM will override this partition number.
|
|
fDBRootExtentList[fCurrentDBRootIdx].fPartition = 0;
|
|
|
|
return NO_ERROR;
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Finish Initializing fDBRootExtentList for any empty DBRoots w/o any extents.
|
|
//------------------------------------------------------------------------------
|
|
void DBRootExtentTracker::initEmptyDBRoots()
|
|
{
|
|
int startExtentIdx = fCurrentDBRootIdx;
|
|
bool bAnyChanges = false; // If fDBRootExtentList changes, log the contents
|
|
|
|
// Fill in starting partition for any DBRoots having no extents
|
|
for (unsigned int iroot = 0; iroot < fDBRootExtentList.size(); iroot++)
|
|
{
|
|
if ((fDBRootExtentList[iroot].fState == DBROOT_EXTENT_EMPTY_DBROOT) &&
|
|
((int)iroot != startExtentIdx)) // skip over selected dbroot
|
|
{
|
|
if (fDBRootExtentList[iroot].fPartition != fDBRootExtentList[startExtentIdx].fPartition)
|
|
{
|
|
bAnyChanges = true;
|
|
|
|
fDBRootExtentList[iroot].fPartition = fDBRootExtentList[startExtentIdx].fPartition;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Log fDBRootExtentList if modifications were made
|
|
if ((bAnyChanges) && (fLog))
|
|
{
|
|
// Always log this info for now; may control with debug later
|
|
// if (fLog->isDebug(DEBUG_1))
|
|
{
|
|
std::ostringstream oss;
|
|
oss << "Updated starting (empty) DBRoot info for OID " << fOID;
|
|
|
|
for (unsigned int k = 0; k < fDBRootExtentList.size(); k++)
|
|
{
|
|
oss << std::endl;
|
|
oss << " DBRoot-" << fDBRootExtentList[k].fDbRoot
|
|
<< ", part/seg/hwm/LBID/totBlks/state: " << fDBRootExtentList[k].fPartition << "/"
|
|
<< fDBRootExtentList[k].fSegment << "/" << fDBRootExtentList[k].fLocalHwm << "/"
|
|
<< fDBRootExtentList[k].fStartLbid << "/" << fDBRootExtentList[k].fDBRootTotalBlocks << "/"
|
|
<< stateStrings[fDBRootExtentList[k].fState];
|
|
}
|
|
|
|
fLog->logMsg(oss.str(), MSGLVL_INFO2);
|
|
}
|
|
}
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Assign the DBRoot/segment file to be used for extent loading based on the
|
|
// setting in the specified reference tracker (set for a reference column).
|
|
//
|
|
// Mutex lock not needed in this function as it is only called from main thread
|
|
// before processing threads are spawned.
|
|
//------------------------------------------------------------------------------
|
|
void DBRootExtentTracker::assignFirstSegFile(const DBRootExtentTracker& refTracker,
|
|
DBRootExtentInfo& dbRootExtent)
|
|
{
|
|
// Start with the same DBRoot index as the reference tracker; assumes that
|
|
// DBRoots for each column are listed in same order in fDBRootExtentList.
|
|
// That should be a safe assumption since DBRootExtentTracker constructor
|
|
// sorts the entries in fDBRootExtentList by fDbRoot.
|
|
int startExtentIdx = refTracker.fCurrentDBRootIdx;
|
|
fEmptyOrDisabledPM = refTracker.fEmptyOrDisabledPM;
|
|
fEmptyPM = refTracker.fEmptyPM;
|
|
fDisabledHWM = refTracker.fDisabledHWM;
|
|
|
|
// Always start empty PM with partition number 0. If the DBRoot has a HWM
|
|
// extent that is disabled, then BRM will override this partition number.
|
|
if (fEmptyOrDisabledPM)
|
|
{
|
|
fDBRootExtentList[startExtentIdx].fPartition = 0;
|
|
}
|
|
|
|
fCurrentDBRootIdx = startExtentIdx;
|
|
|
|
// Finish Initializing DBRootExtentList for empty DBRoots w/o any extents
|
|
initEmptyDBRoots();
|
|
|
|
logFirstDBRootSelection();
|
|
|
|
dbRootExtent = fDBRootExtentList[startExtentIdx];
|
|
fDBRootExtentList[startExtentIdx].fState = DBROOT_EXTENT_EXTENT_BOUNDARY;
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Log information about the first DBRoot/segment file that is selected.
|
|
//------------------------------------------------------------------------------
|
|
void DBRootExtentTracker::logFirstDBRootSelection() const
|
|
{
|
|
if (fLog)
|
|
{
|
|
int extentIdx = fCurrentDBRootIdx;
|
|
|
|
if (fEmptyOrDisabledPM)
|
|
{
|
|
std::ostringstream oss;
|
|
oss << "No active extents; will add partition to start adding "
|
|
"rows for oid-"
|
|
<< fOID << "; DBRoot-" << fDBRootExtentList[extentIdx].fDbRoot;
|
|
fLog->logMsg(oss.str(), MSGLVL_INFO2);
|
|
}
|
|
else if (fDisabledHWM)
|
|
{
|
|
std::ostringstream oss;
|
|
oss << "HWM extent disabled; will add partition to start adding "
|
|
"rows for oid-"
|
|
<< fOID << "; DBRoot-" << fDBRootExtentList[extentIdx].fDbRoot;
|
|
fLog->logMsg(oss.str(), MSGLVL_INFO2);
|
|
}
|
|
else
|
|
{
|
|
std::ostringstream oss;
|
|
oss << "Selecting existing segFile to begin adding rows: oid-" << fOID << "; DBRoot-"
|
|
<< fDBRootExtentList[extentIdx].fDbRoot
|
|
<< ", part/seg/hwm/LBID/totBlks/state: " << fDBRootExtentList[extentIdx].fPartition << "/"
|
|
<< fDBRootExtentList[extentIdx].fSegment << "/" << fDBRootExtentList[extentIdx].fLocalHwm << "/"
|
|
<< fDBRootExtentList[extentIdx].fStartLbid << "/" << fDBRootExtentList[extentIdx].fDBRootTotalBlocks
|
|
<< "/" << stateStrings[fDBRootExtentList[extentIdx].fState];
|
|
fLog->logMsg(oss.str(), MSGLVL_INFO2);
|
|
}
|
|
}
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Iterate/return next DBRoot to be used for the next extent
|
|
//
|
|
// If it is the "very" 1st extent for the specified DBRoot, then the applicable
|
|
// partition to be used for the first extent, is also returned.
|
|
// If a partial extent is to be filled in, then the current HWM
|
|
// and starting LBID for the relevant extent are returned.
|
|
// If a disabled extent is encountered, the return flag is true, so that
|
|
// we can allocate a new extent at the next physical partition. BRM should
|
|
// take care of figuring out where to allocate this next extent.
|
|
//
|
|
// Returns true if new extent needs to be allocated, else false indicates that
|
|
// the extent is partially full.
|
|
//------------------------------------------------------------------------------
|
|
bool DBRootExtentTracker::nextSegFile(uint16_t& dbRoot, uint32_t& partition, uint16_t& segment, HWM& localHwm,
|
|
BRM::LBID_t& startLbid)
|
|
{
|
|
boost::mutex::scoped_lock lock(fDBRootExtTrkMutex);
|
|
|
|
fCurrentDBRootIdx++;
|
|
|
|
if ((unsigned int)fCurrentDBRootIdx >= fDBRootExtentList.size())
|
|
fCurrentDBRootIdx = 0;
|
|
|
|
dbRoot = fDBRootExtentList[fCurrentDBRootIdx].fDbRoot;
|
|
segment = fDBRootExtentList[fCurrentDBRootIdx].fSegment;
|
|
partition = fDBRootExtentList[fCurrentDBRootIdx].fPartition;
|
|
localHwm = fDBRootExtentList[fCurrentDBRootIdx].fLocalHwm;
|
|
startLbid = fDBRootExtentList[fCurrentDBRootIdx].fStartLbid;
|
|
// std::cout << "NextSegFile: Current idx: " << fCurrentDBRootIdx <<
|
|
//"; new dbroot: " << dbRoot <<
|
|
//"; segment: " << segment <<
|
|
//"; partition: " << partition <<
|
|
//"; localHwm: " << localHwm <<
|
|
//"; startLbid: " << startLbid <<
|
|
//"; state: " << stateStrings[fDBRootExtentList[fCurrentDBRootIdx].fState]
|
|
// << std::endl;
|
|
|
|
bool bAllocExtentFlag = true;
|
|
|
|
if (fDBRootExtentList[fCurrentDBRootIdx].fState == DBROOT_EXTENT_PARTIAL_EXTENT)
|
|
bAllocExtentFlag = false;
|
|
|
|
// After we have taken care of the "first" extent for each DBRoot, we can
|
|
// zero out everything. The only thing we need to continue rotating thru
|
|
// the DBRoots, is the DBRoot number itself.
|
|
fDBRootExtentList[fCurrentDBRootIdx].fSegment = 0;
|
|
fDBRootExtentList[fCurrentDBRootIdx].fPartition = 0;
|
|
fDBRootExtentList[fCurrentDBRootIdx].fLocalHwm = 0;
|
|
fDBRootExtentList[fCurrentDBRootIdx].fStartLbid = 0;
|
|
fDBRootExtentList[fCurrentDBRootIdx].fDBRootTotalBlocks = 0;
|
|
fDBRootExtentList[fCurrentDBRootIdx].fState = DBROOT_EXTENT_EXTENT_BOUNDARY;
|
|
|
|
return bAllocExtentFlag;
|
|
}
|
|
|
|
const std::vector<DBRootExtentInfo>& DBRootExtentTracker::getDBRootExtentList()
|
|
{
|
|
boost::mutex::scoped_lock lock(fDBRootExtTrkMutex);
|
|
return fDBRootExtentList;
|
|
}
|
|
|
|
} // namespace WriteEngine
|