dblwr::recv Namespace Reference

Classes
class	DBLWR
	Redo recovery configuration. More...
struct	Page
	Page recovered from the doublewrite buffer. More...
struct	Page_entry
	A record from reduced doublewrite buffer. More...
class	Pages
	Pages recovered from the doublewrite buffer. More...

Functions
void	create (Pages *&pages) noexcept
	Create the recovery dblwr data structures. More...
dberr_t	load (Pages *pages) noexcept
	Load the doublewrite buffer pages. More...
dberr_t	reduced_load (Pages *pages) noexcept
	Load the doublewrite buffer pages. More...
void	recover (Pages *pages, fil_space_t *space) noexcept
	Restore pages from the double write buffer to the tablespace. More...
const byte *	find (const Pages *pages, const page_id_t &page_id) noexcept
	Find a doublewrite copy of a page. More...
std::tuple< bool, lsn_t >	find_entry (const Pages *pages, const page_id_t &page_id) noexcept
	Find the LSN of the given page id in the dblwr. More...
void	check_missing_tablespaces (const Pages *pages) noexcept
	Check if some pages from the double write buffer could not be restored because of the missing tablespace IDs. More...
void	destroy (Pages *&pages) noexcept
	Free the recovery dblwr data structures. More...

Function Documentation

check_missing_tablespaces()

void dblwr::recv::check_missing_tablespaces ( const Pages *  pages )

noexcept

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

Parameters

[in]

pages

Pages to check

create()

void dblwr::recv::create ( recv::Pages *&  pages )

noexcept

Create the recovery dblwr data structures.

Parameters

[out]

pages

Pointer to newly created instance

destroy()

void dblwr::recv::destroy ( recv::Pages *&  pages )

noexcept

Free the recovery dblwr data structures.

Parameters

[out]

pages

Free the instance

find()

const byte * dblwr::recv::find ( const Pages *  pages, const page_id_t &  page_id  )

noexcept

Find a doublewrite copy of a page.

Parameters

[in]	pages	Pages read from the doublewrite buffer
[in]	page_id	Page number to lookup

Returns

page frame

Return values

NULL	if no page was found

find_entry()

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

noexcept

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

Parameters

[in]	pages	Pages read from the doublewrite buffer
[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::load ( recv::Pages *  pages )

noexcept

Load the doublewrite buffer pages.

Parameters

[in,out]

pages

For storing the doublewrite pages read from the double write buffer

Returns

DB_SUCCESS or error code

6 == strlen(".dblwr").

recover()

void dblwr::recv::recover ( recv::Pages *  pages, fil_space_t *  space  )

noexcept

Restore pages from the double write buffer to the tablespace.

Parameters

[in,out]	pages	Pages from the doublewrite buffer
[in]	space	Tablespace pages to restore, if set to nullptr then try and restore all.

reduced_load()

dberr_t dblwr::recv::reduced_load ( recv::Pages *  pages )

noexcept

Load the doublewrite buffer pages.

Parameters

[in,out]

pages

For storing the doublewrite pages read from the double write buffer

Returns

DB_SUCCESS or error code