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117 lines
4.8 KiB
C++
117 lines
4.8 KiB
C++
/* Copyright (C) 2014 InfiniDB, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; version 2 of
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the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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/** @file
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* Class to restore compressed hdfs db files on behalf of BulkRollBackMgr.
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*/
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#pragma once
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#include <cstdio>
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#include <cstring>
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#include "we_define.h"
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#include "we_type.h"
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#include "we_bulkrollbackfile.h"
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namespace WriteEngine
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{
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class BulkRollbackMgr;
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//------------------------------------------------------------------------------
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/** @brief Class used by BulkRollbackMgr to restore compressed hdfs db files.
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*
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* BulkRollbackFileCompressed is used by non-hdfs system to restore a backup
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* of the hwm compressed chunk.
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* BulkRollbackFileCompressedHdfs is used by hdfs system to restore a backup
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* of the entire hwm compressed db file.
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*/
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//------------------------------------------------------------------------------
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class BulkRollbackFileCompressedHdfs : public BulkRollbackFile
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{
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public:
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/** @brief BulkRollbackFile constructor
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* @param mgr The controlling BulkRollbackMgr object.
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*/
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BulkRollbackFileCompressedHdfs(BulkRollbackMgr* mgr);
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/** @brief BulkRollbackFile destructor
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*/
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~BulkRollbackFileCompressedHdfs() override;
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/** @brief Do we reinit trailing blocks in the HWM extent for the specified
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* segment file
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*
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* @param columnOID OID of the segment file in question
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* @param dbRoot DBRoot for the segment file in question
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* @param partNum Partition number for the segment file in question
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* @param segNum Segment number for the segment file in question
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*/
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bool doWeReInitExtent(OID columnOID, uint32_t dbRoot, uint32_t partNum, uint32_t segNum) const override;
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/** @brief Reinitialize the specified column segment file starting at
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* startOffsetBlk, and truncate trailing extents.
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* @param columnOID OID of the relevant segment file
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* @param dbRoot DBRoot of the relevant segment file
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* @param partNum Partition number of the relevant segment file
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* @param segNum Segment number of the relevant segment file
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* @param startOffsetBlk Starting block offset where file is to be
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* reinitialized
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* @param nBlocks Number of blocks to be reinitialized
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* @param colType Column type of the relevant segment file
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* @param colWidth Width in bytes of column.
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* @param restoreHwmChk Restore HWM chunk
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*/
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void reInitTruncColumnExtent(OID columnOID, uint32_t dbRoot, uint32_t partNum, uint32_t segNum,
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long long startOffsetBlk, int nBlocks,
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execplan::CalpontSystemCatalog::ColDataType colType, uint32_t colWidth,
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bool restoreHwmChk) override;
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/** @brief Reinitialize the specified dictionary store segment file starting
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* at startOffsetBlk, and truncate trailing extents.
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* @param columnOID OID of the relevant segment file
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* @param dbRoot DBRoot of the relevant segment file
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* @param partNum Partition number of the relevant segment file
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* @param segNum Segment number of the relevant segment file
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* @param startOffsetBlk Starting block offset where file is to be
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* reinitialized
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* @param nBlocks Number of blocks to be reinitialized
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*/
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void reInitTruncDctnryExtent(OID columnOID, uint32_t dbRoot, uint32_t partNum, uint32_t segNum,
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long long startOffsetBlk, int nBlocks) override;
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/** @brief Truncate the specified segment file to a specified num of bytes
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* @param columnOID OID of the relevant segment file
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* @param dbRoot DBRoot of the relevant segment file
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* @param partNum Partition number of the relevant segment file
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* @param segNum Segment number of the relevant segment file
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* @param fileSizeBlocks Number of blocks to retain in the file
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*/
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void truncateSegmentFile(OID columnOID, uint32_t dbRoot, uint32_t partNum, uint32_t segNum,
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long long filesSizeBlocks) override;
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private:
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// Disable unnecessary copy constructor and assignment operator
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BulkRollbackFileCompressedHdfs(const BulkRollbackFileCompressedHdfs& rhs);
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BulkRollbackFileCompressedHdfs& operator=(const BulkRollbackFileCompressedHdfs& rhs);
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void restoreFromBackup(const char* colType, OID columnOID, uint32_t dbRoot, uint32_t partNum,
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uint32_t segNum);
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};
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} // namespace WriteEngine
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