bf_tree_cleaner Class Reference

#include <bf_tree_cleaner.h>

Inheritance diagram for bf_tree_cleaner:

Public Member Functions
	bf_tree_cleaner (const sm_options &_options)
	Constructor for bf_tree_cleaner. More...
	~bf_tree_cleaner ()
Public Member Functions inherited from page_cleaner_base
	page_cleaner_base (const sm_options &_options)
virtual	~page_cleaner_base ()
virtual void	notify_archived_lsn (lsn_t)
Public Member Functions inherited from worker_thread_t
	worker_thread_t (int inverval_ms=-1)
virtual	~worker_thread_t ()
void	wakeup (bool wait=false, int rounds_to_wait=-1)
void	stop ()
void	wait_for_round (long round=0)
long	get_rounds_completed () const
bool	is_busy () const
Public Member Functions inherited from thread_wrapper_t
	thread_wrapper_t ()
virtual	~thread_wrapper_t ()
virtual void	before_run ()
virtual void	after_run ()
void	spawn ()
void	fork ()
void	join ()

Protected Member Functions
virtual void	do_work ()
policy_predicate_t	get_policy_predicate (cleaner_policy p)
bool	ignore_min_write_now () const
Protected Member Functions inherited from page_cleaner_base
void	write_pages (size_t from, size_t to)
void	mark_pages_clean (size_t from, size_t to)
Protected Member Functions inherited from worker_thread_t
bool	should_exit () const
void	notify_one ()
void	notify_all ()
void	quit ()

Private Member Functions
void	collect_candidates ()
void	clean_candidates ()
void	flush_clusters (const vector< size_t > &clusters)
bool	latch_and_copy (PageID, bf_idx, size_t wpos)
void	clean_no_policy ()
void	flush_workspace_no_clusters (size_t count)

Private Attributes
vector< cleaner_cb_info >	candidates
size_t	num_candidates
	Cleaner policy options. More...
cleaner_policy	policy
size_t	min_write_size
	Only write out clusters of pages with this minimum size. More...
size_t	min_write_ignore_freq

Additional Inherited Members
Protected Attributes inherited from page_cleaner_base
zero::buffer_pool::BufferPool *	_bufferpool
vector< generic_page, memalign_allocator< generic_page > >	_workspace
size_t	_workspace_size
vector< bf_idx >	_workspace_cb_indexes
lsn_t	_clean_lsn
bool	_write_elision

Constructor & Destructor Documentation

bf_tree_cleaner()

bf_tree_cleaner::bf_tree_cleaner

(

const sm_options &

_options

)

Constructor for bf_tree_cleaner.

This merely allocates arrays and objects. The real start-up is done in do_work() because a constructor can't return error codes.

Parameters

_options

Contains the set cleaner policy and options with regard to the selection of pages to clean.

~bf_tree_cleaner()

bf_tree_cleaner::~bf_tree_cleaner

(

)

Destructs this object. This merely de-allocates arrays and objects. Use request_stop_cleaners() or kill_cleaners() to stop cleaner threads.

Member Function Documentation

clean_candidates()

void bf_tree_cleaner::clean_candidates ( )

private

clean_no_policy()

void bf_tree_cleaner::clean_no_policy ( )

private

collect_candidates()

void bf_tree_cleaner::collect_candidates ( )

private

do_work()

void bf_tree_cleaner::do_work ( )

protectedvirtual

Actual working method to be implemented by derived classes.

Implements worker_thread_t.

flush_clusters()

void bf_tree_cleaner::flush_clusters ( const vector< size_t > &  clusters )

private

flush_workspace_no_clusters()

void bf_tree_cleaner::flush_workspace_no_clusters ( size_t  count )

private

get_policy_predicate()

policy_predicate_t bf_tree_cleaner::get_policy_predicate ( cleaner_policy  p )

protected

Return predicate function object that implements given policy

ignore_min_write_now()

bool bf_tree_cleaner::ignore_min_write_now ( ) const

inlineprotected

latch_and_copy()

bool bf_tree_cleaner::latch_and_copy ( PageID  pid, bf_idx  idx, size_t  wpos  )

private

Member Data Documentation

candidates

vector<cleaner_cb_info> bf_tree_cleaner::candidates

private

List of candidate dirty frames to be considered for cleaning.

min_write_ignore_freq

size_t bf_tree_cleaner::min_write_ignore_freq

private

min_write_size

size_t bf_tree_cleaner::min_write_size

private

Only write out clusters of pages with this minimum size.

num_candidates

size_t bf_tree_cleaner::num_candidates

private

Cleaner policy options.

policy

cleaner_policy bf_tree_cleaner::policy

private

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

• src/sm/bf_tree_cleaner.h
• src/sm/bf_tree_cleaner.cpp