File_Namespace::GlobalFileMgr Class Reference

#include <GlobalFileMgr.h>

Inheritance diagram for File_Namespace::GlobalFileMgr:

Collaboration diagram for File_Namespace::GlobalFileMgr:

Public Member Functions
	GlobalFileMgr (const int32_t deviceId, std::string basePath=".", const size_t num_reader_threads=0, const size_t defaultPageSize=DEFAULT_PAGE_SIZE)
	Constructor. More...
AbstractBuffer *	createBuffer (const ChunkKey &key, size_t pageSize=0, const size_t numBytes=0) override
	Creates a chunk with the specified key and page size. More...
bool	isBufferOnDevice (const ChunkKey &key) override
void	deleteBuffer (const ChunkKey &key, const bool purge=true) override
	Deletes the chunk with the specified key. More...
void	deleteBuffersWithPrefix (const ChunkKey &keyPrefix, const bool purge=true) override
AbstractBuffer *	getBuffer (const ChunkKey &key, const size_t numBytes=0) override
	Returns the a pointer to the chunk with the specified key. More...
void	fetchBuffer (const ChunkKey &key, AbstractBuffer *destBuffer, const size_t numBytes) override
AbstractBuffer *	putBuffer (const ChunkKey &key, AbstractBuffer *d, const size_t numBytes=0) override
	Puts the contents of d into the Chunk with the given key. More...
AbstractBuffer *	alloc (const size_t numBytes) override
void	free (AbstractBuffer *buffer) override
MgrType	getMgrType () override
std::string	getStringMgrType () override
std::string	printSlabs () override
void	clearSlabs () override
size_t	getMaxSize () override
size_t	getInUseSize () override
size_t	getAllocated () override
bool	isAllocationCapped () override
void	init ()
void	getChunkMetadataVecForKeyPrefix (ChunkMetadataVector &chunkMetadataVec, const ChunkKey &keyPrefix) override
void	checkpoint () override
	Fsyncs data files, writes out epoch and fsyncs that. More...
void	checkpoint (const int32_t db_id, const int32_t tb_id) override
size_t	getNumReaderThreads ()
	Returns number of threads defined by parameter num-reader-threads which should be used during initial load and consequent read of data. More...
size_t	getNumChunks () override
AbstractBufferMgr *	findFileMgr (const int32_t db_id, const int32_t tb_id)
void	setFileMgrParams (const int32_t db_id, const int32_t tb_id, const FileMgrParams &file_mgr_params)
AbstractBufferMgr *	getFileMgr (const int32_t db_id, const int32_t tb_id)
AbstractBufferMgr *	getFileMgr (const ChunkKey &key)
std::string	getBasePath () const
size_t	getDefaultPageSize () const
void	writeFileMgrData (FileMgr *fileMgr=0)
int32_t	getDBVersion () const
bool	getDBConvert () const
void	setDBConvert (bool val)
void	removeTableRelatedDS (const int32_t db_id, const int32_t tb_id) override
void	setTableEpoch (const int32_t db_id, const int32_t tb_id, const int32_t start_epoch)
size_t	getTableEpoch (const int32_t db_id, const int32_t tb_id)
StorageStats	getStorageStats (const int32_t db_id, const int32_t tb_id)
std::shared_ptr< FileMgr >	getSharedFileMgr (const int db_id, const int table_id)
void	setFileMgr (const int db_id, const int table_id, std::shared_ptr< FileMgr > file_mgr)
void	closeFileMgr (const int32_t db_id, const int32_t tb_id)

Private Member Functions
AbstractBufferMgr *	findFileMgrUnlocked (const int32_t db_id, const int32_t tb_id)
void	deleteFileMgr (const int32_t db_id, const int32_t tb_id)
bool	existsDiffBetweenFileMgrParamsAndFileMgr (FileMgr *file_mgr, const FileMgrParams &file_mgr_params) const

Private Attributes
std::string	basePath_
size_t	num_reader_threads_
	The OS file system path containing the files. More...
int32_t	epoch_
	number of threads used when loading data More...
size_t	defaultPageSize_
int32_t	omnisci_db_version_
	default page size, used to set FileMgr defaultPageSize_ More...
bool	dbConvert_
std::map< std::pair< int32_t, int32_t >, std::shared_ptr < FileMgr > >	ownedFileMgrs_
std::map< std::pair< int32_t, int32_t >, AbstractBufferMgr * >	allFileMgrs_
mapd_shared_mutex	fileMgrs_mutex_

Detailed Description

Definition at line 53 of file GlobalFileMgr.h.

Constructor & Destructor Documentation

File_Namespace::GlobalFileMgr::GlobalFileMgr	(	const int32_t	deviceId,
		std::string	basePath = ".",
		const size_t	num_reader_threads = 0,
		const size_t	defaultPageSize = DEFAULT_PAGE_SIZE
	)

Constructor.

Definition at line 41 of file GlobalFileMgr.cpp.

References dbConvert_, init(), and omnisci_db_version_.

    : AbstractBufferMgr(deviceId)
    , basePath_(basePath)
    , num_reader_threads_(num_reader_threads)
    , epoch_(-1)
    ,  // set the default epoch for all tables corresponding to the time of
       // last checkpoint
    defaultPageSize_(defaultPageSize) {
  omnisci_db_version_ = 2;
  // DS changes also triggered by individual FileMgr per table project (release 2.1.0)
  dbConvert_ = false;
  init();
}

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Member Function Documentation

AbstractBuffer* File_Namespace::GlobalFileMgr::alloc ( const size_t  numBytes )

inlineoverride

Definition at line 108 of file GlobalFileMgr.h.

References logger::FATAL, and LOG.

                                                        {
    LOG(FATAL) << "Operation not supported";
    return nullptr;  // satisfy return-type warning
  }

void File_Namespace::GlobalFileMgr::checkpoint ( )

override

Fsyncs data files, writes out epoch and fsyncs that.

Definition at line 75 of file GlobalFileMgr.cpp.

References allFileMgrs_, and fileMgrs_mutex_.

                               {
  mapd_unique_lock<mapd_shared_mutex> write_lock(fileMgrs_mutex_);
  for (auto fileMgrsIt = allFileMgrs_.begin(); fileMgrsIt != allFileMgrs_.end();
       ++fileMgrsIt) {
    fileMgrsIt->second->checkpoint();
  }
}

void File_Namespace::GlobalFileMgr::checkpoint ( const int32_t  db_id, const int32_t  tb_id  )

override

Definition at line 83 of file GlobalFileMgr.cpp.

References getFileMgr().

                                                                       {
  getFileMgr(db_id, tb_id)->checkpoint();
}

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void File_Namespace::GlobalFileMgr::clearSlabs ( )

inlineoverride

Definition at line 118 of file GlobalFileMgr.h.

                                    { /* noop */
  }

void File_Namespace::GlobalFileMgr::closeFileMgr	(	const int32_t	db_id,
		const int32_t	tb_id
	)

Definition at line 131 of file GlobalFileMgr.cpp.

References deleteFileMgr(), and fileMgrs_mutex_.

                                                                         {
  mapd_unique_lock<mapd_shared_mutex> write_lock(fileMgrs_mutex_);
  deleteFileMgr(db_id, tb_id);
}

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AbstractBuffer* File_Namespace::GlobalFileMgr::createBuffer ( const ChunkKey &  key, size_t  pageSize = 0, const size_t  numBytes = 0  )

inlineoverride

Creates a chunk with the specified key and page size.

Definition at line 63 of file GlobalFileMgr.h.

Referenced by foreign_storage::ForeignStorageCache::getChunkBufferForPrecaching().

                                                                   {
    return getFileMgr(key)->createBuffer(key, pageSize, numBytes);
  }

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void File_Namespace::GlobalFileMgr::deleteBuffer ( const ChunkKey &  key, const bool  purge = true  )

inlineoverride

Deletes the chunk with the specified key.

Definition at line 77 of file GlobalFileMgr.h.

                                                                           {
    return getFileMgr(key)->deleteBuffer(key, purge);
  }

void File_Namespace::GlobalFileMgr::deleteBuffersWithPrefix ( const ChunkKey &  keyPrefix, const bool  purge = true  )

override

Definition at line 98 of file GlobalFileMgr.cpp.

References getFileMgr().

                                                                                       {
  /* keyPrefix[0] can be -1 only for gpu or cpu buffers but not for FileMgr.
   * There is no assert here, as GlobalFileMgr is being called with -1 value as well in
   * the same loop with other buffers. So the case of -1 will just be ignored, as nothing
   * needs to be done.
   */
  if (keyPrefix[0] != -1) {
    return getFileMgr(keyPrefix)->deleteBuffersWithPrefix(keyPrefix, purge);
  }
}

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void File_Namespace::GlobalFileMgr::deleteFileMgr ( const int32_t  db_id, const int32_t  tb_id  )

private

Definition at line 120 of file GlobalFileMgr.cpp.

References allFileMgrs_, and ownedFileMgrs_.

Referenced by closeFileMgr(), removeTableRelatedDS(), setFileMgrParams(), and setTableEpoch().

                                                                          {
  // NOTE: only call this private function after locking is already in place
  const auto file_mgr_key = std::make_pair(db_id, tb_id);
  if (auto it = ownedFileMgrs_.find(file_mgr_key); it != ownedFileMgrs_.end()) {
    ownedFileMgrs_.erase(it);
  }
  if (auto it = allFileMgrs_.find(file_mgr_key); it != allFileMgrs_.end()) {
    allFileMgrs_.erase(it);
  }
}

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bool File_Namespace::GlobalFileMgr::existsDiffBetweenFileMgrParamsAndFileMgr ( FileMgr *  file_mgr, const FileMgrParams &  file_mgr_params  ) const

private

Definition at line 136 of file GlobalFileMgr.cpp.

References File_Namespace::FileMgrParams::epoch, File_Namespace::FileMgr::lastCheckpointedEpoch(), File_Namespace::FileMgrParams::max_rollback_epochs, and File_Namespace::FileMgr::maxRollbackEpochs().

                                                {
  if (file_mgr_params.epoch != -1 &&
      file_mgr_params.epoch != file_mgr->lastCheckpointedEpoch()) {
    return true;
  }
  if (file_mgr_params.max_rollback_epochs != -1 &&
      file_mgr_params.max_rollback_epochs != file_mgr->maxRollbackEpochs()) {
    return true;
  }
  return false;
}

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void File_Namespace::GlobalFileMgr::fetchBuffer ( const ChunkKey &  key, AbstractBuffer *  destBuffer, const size_t  numBytes  )

inlineoverride

Definition at line 89 of file GlobalFileMgr.h.

                                                   {
    return getFileMgr(key)->fetchBuffer(key, destBuffer, numBytes);
  }

AbstractBufferMgr* File_Namespace::GlobalFileMgr::findFileMgr ( const int32_t  db_id, const int32_t  tb_id  )

inline

Definition at line 153 of file GlobalFileMgr.h.

Referenced by getStorageStats(), getTableEpoch(), setFileMgrParams(), and setTableEpoch().

                                                                           {
    mapd_shared_lock<mapd_shared_mutex> read_lock(fileMgrs_mutex_);
    return findFileMgrUnlocked(db_id, tb_id);
  }

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AbstractBufferMgr * File_Namespace::GlobalFileMgr::findFileMgrUnlocked ( const int32_t  db_id, const int32_t  tb_id  )

private

Definition at line 109 of file GlobalFileMgr.cpp.

References allFileMgrs_.

Referenced by getFileMgr(), and removeTableRelatedDS().

                                                                           {
  // NOTE: only call this private function after locking is already in place
  AbstractBufferMgr* fm = nullptr;
  const auto file_mgr_key = std::make_pair(db_id, tb_id);
  if (auto it = allFileMgrs_.find(file_mgr_key); it != allFileMgrs_.end()) {
    fm = it->second;
  }
  return fm;
}

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void File_Namespace::GlobalFileMgr::free ( AbstractBuffer *  buffer )

inlineoverride

Definition at line 113 of file GlobalFileMgr.h.

References logger::FATAL, and LOG.

{ LOG(FATAL) << "Operation not supported"; }

size_t File_Namespace::GlobalFileMgr::getAllocated ( )

inlineoverride

Definition at line 122 of file GlobalFileMgr.h.

{ return 0; }

std::string File_Namespace::GlobalFileMgr::getBasePath ( ) const

inline

Definition at line 165 of file GlobalFileMgr.h.

Referenced by anonymous_namespace{TableArchiver.cpp}::abs_path(), File_Namespace::FileMgr::coreInit(), and File_Namespace::FileMgr::FileMgr().

{ return basePath_; }

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AbstractBuffer* File_Namespace::GlobalFileMgr::getBuffer ( const ChunkKey &  key, const size_t  numBytes = 0  )

inlineoverride

Returns the a pointer to the chunk with the specified key.

Definition at line 85 of file GlobalFileMgr.h.

Referenced by foreign_storage::ForeignStorageCache::getChunkBufferForPrecaching().

                                                                                     {
    return getFileMgr(key)->getBuffer(key, numBytes);
  }

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void File_Namespace::GlobalFileMgr::getChunkMetadataVecForKeyPrefix ( ChunkMetadataVector &  chunkMetadataVec, const ChunkKey &  keyPrefix  )

inlineoverride

Definition at line 127 of file GlobalFileMgr.h.

                                                                           {
    return getFileMgr(keyPrefix)->getChunkMetadataVecForKeyPrefix(chunkMetadataVec,
                                                                  keyPrefix);
  }

bool File_Namespace::GlobalFileMgr::getDBConvert ( ) const

inline

Definition at line 171 of file GlobalFileMgr.h.

Referenced by File_Namespace::FileMgr::getDBConvert().

{ return dbConvert_; }

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int32_t File_Namespace::GlobalFileMgr::getDBVersion ( ) const

inline

Definition at line 170 of file GlobalFileMgr.h.

Referenced by File_Namespace::FileMgr::getDBVersion().

{ return omnisci_db_version_; }

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size_t File_Namespace::GlobalFileMgr::getDefaultPageSize ( ) const

inline

Definition at line 166 of file GlobalFileMgr.h.

{ return defaultPageSize_; }

AbstractBufferMgr * File_Namespace::GlobalFileMgr::getFileMgr	(	const int32_t	db_id,
		const int32_t	tb_id
	)

Definition at line 172 of file GlobalFileMgr.cpp.

References allFileMgrs_, CHECK, defaultPageSize_, epoch_, fileMgrs_mutex_, findFileMgrUnlocked(), ForeignStorageInterface::lookupBufferManager(), num_reader_threads_, and ownedFileMgrs_.

Referenced by checkpoint(), deleteBuffersWithPrefix(), foreign_storage::ForeignStorageCache::getCacheDirectoryForTablePrefix(), and File_Namespace::FileMgr::init().

                                                                                     {
  {  // check if FileMgr already exists for (db_id, tb_id)
    mapd_shared_lock<mapd_shared_mutex> read_lock(fileMgrs_mutex_);
    AbstractBufferMgr* fm = findFileMgrUnlocked(db_id, tb_id);
    if (fm) {
      return fm;
    }
  }

  {  // create new FileMgr for (db_id, tb_id)
    mapd_unique_lock<mapd_shared_mutex> write_lock(fileMgrs_mutex_);
    AbstractBufferMgr* fm = findFileMgrUnlocked(db_id, tb_id);
    if (fm) {
      return fm;  // mgr was added between the read lock and the write lock
    }
    const auto file_mgr_key = std::make_pair(db_id, tb_id);
    const auto foreign_buffer_manager =
        ForeignStorageInterface::lookupBufferManager(db_id, tb_id);
    if (foreign_buffer_manager) {
      CHECK(allFileMgrs_.insert(std::make_pair(file_mgr_key, foreign_buffer_manager))
                .second);
      return foreign_buffer_manager;
    } else {
      auto s = std::make_shared<FileMgr>(0,
                                         this,
                                         file_mgr_key,
                                         -1 /*DEFAULT_MAX_ROLLBACK_EPOCHS*/,
                                         num_reader_threads_,
                                         epoch_,
                                         defaultPageSize_);
      CHECK(ownedFileMgrs_.insert(std::make_pair(file_mgr_key, s)).second);
      CHECK(allFileMgrs_.insert(std::make_pair(file_mgr_key, s.get())).second);
      return s.get();
    }
  }
}

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AbstractBufferMgr* File_Namespace::GlobalFileMgr::getFileMgr ( const ChunkKey &  key )

inline

Definition at line 161 of file GlobalFileMgr.h.

                                                     {
    return getFileMgr(key[0], key[1]);
  }

size_t File_Namespace::GlobalFileMgr::getInUseSize ( )

inlineoverride

Definition at line 121 of file GlobalFileMgr.h.

{ return 0; }

size_t File_Namespace::GlobalFileMgr::getMaxSize ( )

inlineoverride

Definition at line 120 of file GlobalFileMgr.h.

{ return 0; }

MgrType File_Namespace::GlobalFileMgr::getMgrType ( )

inlineoverride

Definition at line 115 of file GlobalFileMgr.h.

{ return GLOBAL_FILE_MGR; };

size_t File_Namespace::GlobalFileMgr::getNumChunks ( )

override

Definition at line 87 of file GlobalFileMgr.cpp.

References allFileMgrs_, and fileMgrs_mutex_.

                                   {
  mapd_shared_lock<mapd_shared_mutex> read_lock(fileMgrs_mutex_);
  size_t num_chunks = 0;
  for (auto fileMgrsIt = allFileMgrs_.begin(); fileMgrsIt != allFileMgrs_.end();
       ++fileMgrsIt) {
    num_chunks += fileMgrsIt->second->getNumChunks();
  }

  return num_chunks;
}

size_t File_Namespace::GlobalFileMgr::getNumReaderThreads ( )

inline

Returns number of threads defined by parameter num-reader-threads which should be used during initial load and consequent read of data.

Definition at line 144 of file GlobalFileMgr.h.

{ return num_reader_threads_; }

std::shared_ptr< FileMgr > File_Namespace::GlobalFileMgr::getSharedFileMgr	(	const int	db_id,
		const int	table_id
	)

Definition at line 210 of file GlobalFileMgr.cpp.

References ownedFileMgrs_.

                                                                             {
  const auto table_key = std::make_pair(db_id, table_id);
  if (ownedFileMgrs_.find(table_key) == ownedFileMgrs_.end()) {
    return nullptr;
  }
  return ownedFileMgrs_[table_key];
}

StorageStats File_Namespace::GlobalFileMgr::getStorageStats	(	const int32_t	db_id,
		const int32_t	tb_id
	)

Definition at line 297 of file GlobalFileMgr.cpp.

References defaultPageSize_, fileMgrs_mutex_, and findFileMgr().

                                                                                    {
  mapd_shared_lock<mapd_shared_mutex> read_lock(fileMgrs_mutex_);
  AbstractBufferMgr* opened_fm = findFileMgr(db_id, tb_id);
  if (opened_fm) {
    return dynamic_cast<FileMgr*>(opened_fm)->getStorageStats();
  }
  // Do not do full init of table just to get storage stats, just check file instead
  const auto file_mgr_key = std::make_pair(db_id, tb_id);
  auto u = std::make_unique<FileMgr>(0, this, file_mgr_key, defaultPageSize_, true);
  const auto basic_storage_stats = u->getStorageStats();
  u.reset();
  return basic_storage_stats;
}

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std::string File_Namespace::GlobalFileMgr::getStringMgrType ( )

inlineoverride

Definition at line 116 of file GlobalFileMgr.h.

{ return ToString(GLOBAL_FILE_MGR); }

size_t File_Namespace::GlobalFileMgr::getTableEpoch	(	const int32_t	db_id,
		const int32_t	tb_id
	)

Definition at line 281 of file GlobalFileMgr.cpp.

References defaultPageSize_, fileMgrs_mutex_, and findFileMgr().

                                                                            {
  // UX change was made to this function Oct 2020 to return checkpointed epoch. In turn,
  // setTableEpoch was changed to set the epoch at the user's input, instead of input - 1
  mapd_shared_lock<mapd_shared_mutex> read_lock(fileMgrs_mutex_);
  AbstractBufferMgr* opened_fm = findFileMgr(db_id, tb_id);
  if (opened_fm) {
    return dynamic_cast<FileMgr*>(opened_fm)->lastCheckpointedEpoch();
  }
  // Do not do full init of table just to get table epoch, just check file instead
  const auto file_mgr_key = std::make_pair(db_id, tb_id);
  auto u = std::make_unique<FileMgr>(0, this, file_mgr_key, defaultPageSize_, true);
  const auto epoch = u->lastCheckpointedEpoch();
  u.reset();
  return epoch;
}

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void File_Namespace::GlobalFileMgr::init

(

)

Definition at line 58 of file GlobalFileMgr.cpp.

References basePath_, logger::FATAL, and LOG.

Referenced by GlobalFileMgr().

                         {
  // check if basePath_ already exists, and if not create one
  boost::filesystem::path path(basePath_);
  if (basePath_.size() > 0 && basePath_[basePath_.size() - 1] != '/') {
    basePath_.push_back('/');
  }
  if (boost::filesystem::exists(path)) {
    if (!boost::filesystem::is_directory(path)) {
      LOG(FATAL) << "Specified path is not a directory.";
    }
  } else {  // data directory does not exist
    if (!boost::filesystem::create_directory(path)) {
      LOG(FATAL) << "Could not create data directory";
    }
  }
}

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bool File_Namespace::GlobalFileMgr::isAllocationCapped ( )

inlineoverride

Definition at line 123 of file GlobalFileMgr.h.

{ return false; }

bool File_Namespace::GlobalFileMgr::isBufferOnDevice ( const ChunkKey &  key )

inlineoverride

Definition at line 69 of file GlobalFileMgr.h.

                                                      {
    return getFileMgr(key)->isBufferOnDevice(key);
  }

std::string File_Namespace::GlobalFileMgr::printSlabs ( )

inlineoverride

Definition at line 117 of file GlobalFileMgr.h.

{ return "Not Implemented"; }

AbstractBuffer* File_Namespace::GlobalFileMgr::putBuffer ( const ChunkKey &  key, AbstractBuffer *  d, const size_t  numBytes = 0  )

inlineoverride

Puts the contents of d into the Chunk with the given key.

Parameters

key	- Unique identifier for a Chunk.
d	- An object representing the source data for the Chunk.

Returns

AbstractBuffer*

Definition at line 101 of file GlobalFileMgr.h.

                                                                {
    return getFileMgr(key)->putBuffer(key, d, numBytes);
  }

void File_Namespace::GlobalFileMgr::removeTableRelatedDS ( const int32_t  db_id, const int32_t  tb_id  )

override

Definition at line 244 of file GlobalFileMgr.cpp.

References File_Namespace::FileMgr::closeRemovePhysical(), defaultPageSize_, deleteFileMgr(), fileMgrs_mutex_, and findFileMgrUnlocked().

                                                                                 {
  mapd_unique_lock<mapd_shared_mutex> write_lock(fileMgrs_mutex_);
  auto fm = dynamic_cast<File_Namespace::FileMgr*>(findFileMgrUnlocked(db_id, tb_id));
  if (fm) {
    fm->closeRemovePhysical();
  } else {
    // fileMgr has not been initialized so there is no need to
    // spend the time initializing
    // initialize just enough to have to rename
    const auto file_mgr_key = std::make_pair(db_id, tb_id);
    auto u = std::make_unique<FileMgr>(0, this, file_mgr_key, defaultPageSize_, true);
    u->closeRemovePhysical();
  }
  // remove table related in-memory DS only if directory was removed successfully

  deleteFileMgr(db_id, tb_id);
}

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void File_Namespace::GlobalFileMgr::setDBConvert ( bool  val )

inline

Definition at line 172 of file GlobalFileMgr.h.

{ dbConvert_ = val; }

void File_Namespace::GlobalFileMgr::setFileMgr	(	const int	db_id,
		const int	table_id,
		std::shared_ptr< FileMgr >	file_mgr
	)

Definition at line 220 of file GlobalFileMgr.cpp.

References allFileMgrs_, and ownedFileMgrs_.

                                                                {
  allFileMgrs_[{db_id, table_id}] = file_mgr.get();
  ownedFileMgrs_[{db_id, table_id}] = file_mgr;
}

void File_Namespace::GlobalFileMgr::setFileMgrParams	(	const int32_t	db_id,
		const int32_t	tb_id,
		const FileMgrParams &	file_mgr_params
	)

Definition at line 150 of file GlobalFileMgr.cpp.

References allFileMgrs_, CHECK, defaultPageSize_, deleteFileMgr(), File_Namespace::FileMgrParams::epoch, epoch_, fileMgrs_mutex_, findFileMgr(), File_Namespace::FileMgrParams::max_rollback_epochs, num_reader_threads_, and ownedFileMgrs_.

                                                                           {
  auto fm = dynamic_cast<File_Namespace::FileMgr*>(findFileMgr(db_id, tb_id));
  mapd_unique_lock<mapd_shared_mutex> write_lock(fileMgrs_mutex_);
  if (fm) {
    deleteFileMgr(db_id, tb_id);
  }
  const auto file_mgr_key = std::make_pair(db_id, tb_id);
  auto s = std::make_shared<FileMgr>(
      0,
      this,
      file_mgr_key,
      file_mgr_params.max_rollback_epochs >= 0 ? file_mgr_params.max_rollback_epochs : -1,
      num_reader_threads_,
      file_mgr_params.epoch != -1 ? file_mgr_params.epoch : epoch_,
      defaultPageSize_);
  CHECK(ownedFileMgrs_.insert(std::make_pair(file_mgr_key, s)).second);
  CHECK(allFileMgrs_.insert(std::make_pair(file_mgr_key, s.get())).second);
  return;
}

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void File_Namespace::GlobalFileMgr::setTableEpoch	(	const int32_t	db_id,
		const int32_t	tb_id,
		const int32_t	start_epoch
	)

Definition at line 262 of file GlobalFileMgr.cpp.

References defaultPageSize_, deleteFileMgr(), findFileMgr(), and num_reader_threads_.

                                                             {
  AbstractBufferMgr* opened_fm = findFileMgr(db_id, tb_id);
  if (opened_fm) {
    // Delete this FileMgr to ensure epoch change occurs in constructor with other
    // reads/writes locked out
    deleteFileMgr(db_id, tb_id);
  }
  const auto file_mgr_key = std::make_pair(db_id, tb_id);
  // this is where the real rollback of any data ahead of the currently set epoch is
  // performed
  // Will call set_epoch with start_epoch internally
  auto u = std::make_unique<FileMgr>(
      0, this, file_mgr_key, -1, num_reader_threads_, start_epoch, defaultPageSize_);
  // remove the dummy one we built
  u.reset();
}

Here is the call graph for this function:

void File_Namespace::GlobalFileMgr::writeFileMgrData

(

FileMgr *

fileMgr = 0

)

Definition at line 227 of file GlobalFileMgr.cpp.

References allFileMgrs_, CHECK, File_Namespace::FileMgr::chunkIndex_, and fileMgrs_mutex_.

                      {  // this function is not used, keep it for now for future needs
  mapd_shared_lock<mapd_shared_mutex> read_lock(fileMgrs_mutex_);
  for (auto fileMgrIt = allFileMgrs_.begin(); fileMgrIt != allFileMgrs_.end();
       fileMgrIt++) {
    FileMgr* fm = dynamic_cast<FileMgr*>(fileMgrIt->second);
    CHECK(fm);
    if ((fileMgr != 0) && (fileMgr != fm)) {
      continue;
    }
    for (auto chunkIt = fm->chunkIndex_.begin(); chunkIt != fm->chunkIndex_.end();
         chunkIt++) {
      chunkIt->second->write((int8_t*)chunkIt->second, chunkIt->second->size(), 0);
    }
  }
}

Member Data Documentation

std::map<std::pair<int32_t, int32_t>, AbstractBufferMgr*> File_Namespace::GlobalFileMgr::allFileMgrs_

private

Definition at line 212 of file GlobalFileMgr.h.

Referenced by checkpoint(), deleteFileMgr(), findFileMgrUnlocked(), getFileMgr(), getNumChunks(), setFileMgr(), setFileMgrParams(), and writeFileMgrData().

std::string File_Namespace::GlobalFileMgr::basePath_

private

Definition at line 192 of file GlobalFileMgr.h.

Referenced by init().

bool File_Namespace::GlobalFileMgr::dbConvert_

private

DB version for DataMgr DS and corresponding file buffer read/write code

Definition at line 208 of file GlobalFileMgr.h.

Referenced by GlobalFileMgr().

size_t File_Namespace::GlobalFileMgr::defaultPageSize_

private

Definition at line 199 of file GlobalFileMgr.h.

Referenced by getFileMgr(), getStorageStats(), getTableEpoch(), removeTableRelatedDS(), setFileMgrParams(), and setTableEpoch().

int32_t File_Namespace::GlobalFileMgr::epoch_

private

number of threads used when loading data

Definition at line 195 of file GlobalFileMgr.h.

Referenced by getFileMgr(), and setFileMgrParams().

mapd_shared_mutex File_Namespace::GlobalFileMgr::fileMgrs_mutex_

private

Definition at line 214 of file GlobalFileMgr.h.

Referenced by checkpoint(), closeFileMgr(), getFileMgr(), getNumChunks(), getStorageStats(), getTableEpoch(), removeTableRelatedDS(), setFileMgrParams(), and writeFileMgrData().

size_t File_Namespace::GlobalFileMgr::num_reader_threads_

private

The OS file system path containing the files.

Definition at line 193 of file GlobalFileMgr.h.

Referenced by getFileMgr(), setFileMgrParams(), and setTableEpoch().

int32_t File_Namespace::GlobalFileMgr::omnisci_db_version_

private

default page size, used to set FileMgr defaultPageSize_

Definition at line 202 of file GlobalFileMgr.h.

Referenced by GlobalFileMgr().

std::map<std::pair<int32_t, int32_t>, std::shared_ptr<FileMgr> > File_Namespace::GlobalFileMgr::ownedFileMgrs_

private

true if conversion should be done between different "omnisci_db_version_"

Definition at line 211 of file GlobalFileMgr.h.

Referenced by deleteFileMgr(), getFileMgr(), getSharedFileMgr(), setFileMgr(), and setFileMgrParams().

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The documentation for this class was generated from the following files:

• /home/jenkins-slave/workspace/core-os-doxygen/DataMgr/FileMgr/GlobalFileMgr.h
• /home/jenkins-slave/workspace/core-os-doxygen/DataMgr/FileMgr/GlobalFileMgr.cpp