Hypertable::FileBlockCache Class Reference

#include <FileBlockCache.h>

Classes
class	BlockCacheEntry
struct	DecrementRefCount
struct	HashI64

Public Member Functions
	FileBlockCache (int64_t min_memory, int64_t max_memory, bool compressed)
	~FileBlockCache ()
bool	compressed ()
bool	checkout (int file_id, uint64_t file_offset, uint8_t **blockp, uint32_t *lengthp)
void	checkin (int file_id, uint64_t file_offset)
bool	insert (int file_id, uint64_t file_offset, uint8_t *block, uint32_t length, const EventPtr &event, bool checkout)
bool	contains (int file_id, uint64_t file_offset)
void	increase_limit (int64_t amount)
int64_t	decrease_limit (int64_t amount)
	Lowers the memory limit. More...
int64_t	get_limit ()
void	cap_memory_use ()
	Sets limit to memory currently used, it will not reduce the limit below min_memory. More...
int64_t	memory_used ()
int64_t	available ()
void	get_stats (uint64_t *max_memoryp, uint64_t *available_memoryp, uint64_t *accessesp, uint64_t *hitsp)

Static Public Member Functions
static int	get_next_file_id ()

Private Types
typedef boost::multi_index_container < BlockCacheEntry, indexed_by < sequenced<>, hashed_unique < const_mem_fun < BlockCacheEntry, int64_t,&BlockCacheEntry::key > , HashI64 > > >	BlockCache
typedef BlockCache::nth_index < 0 >::type	Sequence
typedef BlockCache::nth_index < 1 >::type	HashIndex

Private Member Functions
int64_t	make_room (int64_t amount)

Static Private Member Functions
static int64_t	make_key (int file_id, uint64_t file_offset)

Private Attributes
std::mutex	m_mutex
BlockCache	m_cache
int64_t	m_min_memory
int64_t	m_max_memory
int64_t	m_limit
int64_t	m_available
uint64_t	m_accesses
uint64_t	m_hits
bool	m_compressed

Static Private Attributes
static std::atomic< int >	ms_next_file_id {0}

Detailed Description

Definition at line 40 of file FileBlockCache.h.

Member Typedef Documentation

typedef boost::multi_index_container< BlockCacheEntry, indexed_by< sequenced<>, hashed_unique<const_mem_fun<BlockCacheEntry, int64_t, &BlockCacheEntry::key>, HashI64> > > Hypertable::FileBlockCache::BlockCache

private

Definition at line 154 of file FileBlockCache.h.

typedef BlockCache::nth_index<1>::type Hypertable::FileBlockCache::HashIndex

private

Definition at line 157 of file FileBlockCache.h.

typedef BlockCache::nth_index<0>::type Hypertable::FileBlockCache::Sequence

private

Definition at line 156 of file FileBlockCache.h.

Constructor & Destructor Documentation

Hypertable::FileBlockCache::FileBlockCache ( int64_t  min_memory, int64_t  max_memory, bool  compressed  )

inline

Definition at line 45 of file FileBlockCache.h.

FileBlockCache::~FileBlockCache

(

)

Definition at line 35 of file FileBlockCache.cc.

Member Function Documentation

int64_t Hypertable::FileBlockCache::available ( )

inline

Definition at line 100 of file FileBlockCache.h.

void Hypertable::FileBlockCache::cap_memory_use ( )

inline

Sets limit to memory currently used, it will not reduce the limit below min_memory.

Definition at line 82 of file FileBlockCache.h.

void FileBlockCache::checkin	(	int	file_id,
		uint64_t	file_offset
	)

Definition at line 72 of file FileBlockCache.cc.

bool FileBlockCache::checkout	(	int	file_id,
		uint64_t	file_offset,
		uint8_t **	blockp,
		uint32_t *	lengthp
	)

Definition at line 45 of file FileBlockCache.cc.

bool Hypertable::FileBlockCache::compressed ( )

inline

Definition at line 51 of file FileBlockCache.h.

bool FileBlockCache::contains	(	int	file_id,
		uint64_t	file_offset
	)

Definition at line 122 of file FileBlockCache.cc.

int64_t FileBlockCache::decrease_limit

(

int64_t

amount

)

Lowers the memory limit.

This method will free memory if necessary to bring the limit down by 'amount' It will not reduce the limit below min_memory

Parameters

amount

Amount to reduce limit by

Returns

amount of memory deallocated by the method

Definition at line 146 of file FileBlockCache.cc.

int64_t Hypertable::FileBlockCache::get_limit ( )

inline

Definition at line 73 of file FileBlockCache.h.

static int Hypertable::FileBlockCache::get_next_file_id ( )

inlinestatic

Definition at line 105 of file FileBlockCache.h.

void FileBlockCache::get_stats	(	uint64_t *	max_memoryp,
		uint64_t *	available_memoryp,
		uint64_t *	accessesp,
		uint64_t *	hitsp
	)

Definition at line 181 of file FileBlockCache.cc.

void FileBlockCache::increase_limit

(

int64_t

amount

)

Definition at line 136 of file FileBlockCache.cc.

bool FileBlockCache::insert	(	int	file_id,
		uint64_t	file_offset,
		uint8_t *	block,
		uint32_t	length,
		const EventPtr &	event,
		bool	checkout
	)

Definition at line 86 of file FileBlockCache.cc.

static int64_t Hypertable::FileBlockCache::make_key ( int  file_id, uint64_t  file_offset  )

inlinestaticprivate

Definition at line 114 of file FileBlockCache.h.

int64_t FileBlockCache::make_room ( int64_t  amount )

private

Definition at line 162 of file FileBlockCache.cc.

int64_t Hypertable::FileBlockCache::memory_used ( )

inline

Definition at line 95 of file FileBlockCache.h.

Member Data Documentation

uint64_t Hypertable::FileBlockCache::m_accesses

private

Definition at line 165 of file FileBlockCache.h.

int64_t Hypertable::FileBlockCache::m_available

private

Definition at line 164 of file FileBlockCache.h.

BlockCache Hypertable::FileBlockCache::m_cache

private

Definition at line 160 of file FileBlockCache.h.

bool Hypertable::FileBlockCache::m_compressed

private

Definition at line 167 of file FileBlockCache.h.

uint64_t Hypertable::FileBlockCache::m_hits

private

Definition at line 166 of file FileBlockCache.h.

int64_t Hypertable::FileBlockCache::m_limit

private

Definition at line 163 of file FileBlockCache.h.

int64_t Hypertable::FileBlockCache::m_max_memory

private

Definition at line 162 of file FileBlockCache.h.

int64_t Hypertable::FileBlockCache::m_min_memory

private

Definition at line 161 of file FileBlockCache.h.

std::mutex Hypertable::FileBlockCache::m_mutex

private

Definition at line 159 of file FileBlockCache.h.

atomic< int > FileBlockCache::ms_next_file_id {0}

staticprivate

Definition at line 42 of file FileBlockCache.h.

---

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

• /home/doug/src/hypertable/src/cc/Hypertable/RangeServer/FileBlockCache.h
• /home/doug/src/hypertable/src/cc/Hypertable/RangeServer/FileBlockCache.cc