dblwr::recv::DBLWR Class Reference

Redo recovery configuration. More...

#include <buf0dblwr.h>

Public Member Functions
	DBLWR () noexcept
	Constructor. More...
	~DBLWR () noexcept
	Destructor. More...
bool	empty () const noexcept
dberr_t	load () noexcept
	Load the doublewrite buffer pages. More...
dberr_t	reduced_load () noexcept
	Load the doublewrite buffer pages. More...
void	recover (fil_space_t *space=nullptr) noexcept
	Restore pages from the double write buffer to the tablespace. More...
const byte *	find (const page_id_t &page_id) noexcept
	Find a doublewrite copy of a page. More...
std::tuple< bool, lsn_t >	find_entry (const page_id_t &page_id) noexcept
	Find the LSN of the given page id in the dblwr. More...
void	check_missing_tablespaces () noexcept
	Check if some pages from the double write buffer could not be restored because of the missing tablespace IDs. More...
void	recovered () noexcept
	Note that recovery is complete. More...
	DBLWR (const DBLWR &)=delete
	Disably copying. More...
	DBLWR (const DBLWR &&)=delete
DBLWR &	operator= (DBLWR &&)=delete
DBLWR &	operator= (const DBLWR &)=delete

Private Attributes
Pages *	m_pages {}
	Pages read from the double write file. More...

Detailed Description

Redo recovery configuration.

Constructor & Destructor Documentation

DBLWR() [1/3]

dblwr::recv::DBLWR::DBLWR ( )

inlineexplicitnoexcept

Constructor.

~DBLWR()

dblwr::recv::DBLWR::~DBLWR ( )

inlinenoexcept

Destructor.

DBLWR() [2/3]

dblwr::recv::DBLWR::DBLWR ( const DBLWR &  )

delete

Disably copying.

DBLWR() [3/3]

dblwr::recv::DBLWR::DBLWR ( const DBLWR &&  )

delete

Member Function Documentation

check_missing_tablespaces()

void dblwr::recv::DBLWR::check_missing_tablespaces ( )

inlinenoexcept

Check if some pages from the double write buffer could not be restored because of the missing tablespace IDs.

empty()

bool dblwr::recv::DBLWR::empty ( ) const

inlinenoexcept

Returns

true if empty.

find()

const byte * dblwr::recv::DBLWR::find ( const page_id_t &  page_id )

inlinenoexcept

Find a doublewrite copy of a page.

Parameters

[in]

page_id

Page number to lookup

Returns

page frame

Return values

nullptr

if no page was found

find_entry()

std::tuple< bool, lsn_t > dblwr::recv::DBLWR::find_entry ( const page_id_t &  page_id )

inlinenoexcept

Find the LSN of the given page id in the dblwr.

Parameters

[in]

page_id

Page number to lookup

Returns

0th element is true if page_id found in double write buffer.

1st element is valid only if 0th element is true.

1st element contains the LSN of the page in dblwr.

load()

dberr_t dblwr::recv::DBLWR::load ( )

inlinenoexcept

Load the doublewrite buffer pages.

Doesn't create the doublewrite

Returns

DB_SUCCESS or error code

operator=() [1/2]

DBLWR & dblwr::recv::DBLWR::operator= ( const DBLWR &  )

delete

operator=() [2/2]

DBLWR & dblwr::recv::DBLWR::operator= ( DBLWR &&  )

delete

recover()

void dblwr::recv::DBLWR::recover ( fil_space_t *  space = nullptr )

inlinenoexcept

Restore pages from the double write buffer to the tablespace.

Parameters

[in]

space

Tablespace pages to restore, if set to nullptr then try and restore all.

recovered()

void dblwr::recv::DBLWR::recovered ( )

inlinenoexcept

Note that recovery is complete.

Adjust the file sizes if necessary.

reduced_load()

dberr_t dblwr::recv::DBLWR::reduced_load ( )

inlinenoexcept

Load the doublewrite buffer pages.

Doesn't create the doublewrite

Returns

DB_SUCCESS or error code

Member Data Documentation

m_pages

Pages* dblwr::recv::DBLWR::m_pages {}

private

Pages read from the double write file.

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

• storage/innobase/include/buf0dblwr.h