mongo::dur::Journal Class Reference

#include <dur_journalimpl.h>

Classes
struct	JFile
Public Member Functions
void	assureLogFileOpen ()
void	cleanup ()
unsigned long long	curFileId () const
boost::filesystem::path	getFilePathFor (int filenumber) const
void	init ()
void	journal (const AlignedBuilder &b)
	Journal ()
unsigned long long	lastFlushTime () const
void	open ()
void	rotate ()
Public Attributes
string	dir
Static Public Attributes
static const unsigned long long	DataLimit = (sizeof(void)==4) ? 256 1024 * 1024 : 1 * 1024 * 1024 * 1024
Private Member Functions
void	_open ()
void	closeCurrentJournalFile ()
void	removeUnneededJournalFiles ()
void	updateLSNFile ()
Static Private Member Functions
static void	postFlush ()
static void	preFlush ()
Private Attributes
unsigned long long	_curFileId
LogFile *	_curLogFile
mutex	_curLogFileMutex
unsigned long long	_lastFlushTime
unsigned	_nextFileNumber
list< JFile >	_oldJournalFiles
unsigned long long	_preFlushTime
bool	_writeToLSNNeeded
unsigned long long	_written

Detailed Description

the writeahead journal for durability

Definition at line 25 of file dur_journalimpl.h.

Constructor & Destructor Documentation

mongo::dur::Journal::Journal ( )

Member Function Documentation

void mongo::dur::Journal::_open ( ) [private]

void mongo::dur::Journal::assureLogFileOpen ( ) [inline]

Definition at line 55 of file dur_journalimpl.h.

void mongo::dur::Journal::cleanup ( )

void mongo::dur::Journal::closeCurrentJournalFile ( ) [private]

unsigned long long mongo::dur::Journal::curFileId ( ) const [inline]

Definition at line 53 of file dur_journalimpl.h.

boost::filesystem::path mongo::dur::Journal::getFilePathFor ( int filenumber ) const

void mongo::dur::Journal::init ( )

call during startup by journalMakeDir()

void mongo::dur::Journal::journal ( const AlignedBuilder & b )

write to journal

unsigned long long mongo::dur::Journal::lastFlushTime ( ) const [inline]

Definition at line 44 of file dur_journalimpl.h.

void mongo::dur::Journal::open ( )

open a journal file to journal operations to.

static void mongo::dur::Journal::postFlush ( ) [static, private]

static void mongo::dur::Journal::preFlush ( ) [static, private]

void mongo::dur::Journal::removeUnneededJournalFiles ( ) [private]

void mongo::dur::Journal::rotate ( )

check if time to rotate files. assure a file is open. done separately from the journal() call as we can do this part outside of lock. thread: durThread()

void mongo::dur::Journal::updateLSNFile ( ) [private]