clone0snapshot.h File Reference

Database Physical Snapshot. More...

#include "univ.i"
#include "arch0log.h"
#include "arch0page.h"
#include "clone0api.h"
#include "clone0desc.h"
#include "clone0monitor.h"
#include "fil0fil.h"
#include "sql/handler.h"
#include <map>
#include <vector>

Go to the source code of this file.

Classes
struct	Clone_file_ctx
struct	Clone_Page
	Page identified by space and page number. More...
struct	Less_Clone_Page
	Comparator for storing sorted page ID. More...
class	Clone_Snapshot
	Dynamic database snapshot: Holds metadata and handle to data. More...
class	Clone_Snapshot::State_transit
	RAII style guard for begin & end of snapshot state transition. More...

Typedefs
using	Clone_File_Vec = std::vector< Clone_file_ctx * >
	Vector type for storing clone files. More...
using	Clone_File_Map = std::map< space_id_t, uint >
	Map type for mapping space ID to clone file index. More...
using	Clone_Page_Vec = std::vector< Clone_Page >
	Vector type for storing clone page IDs. More...
using	Clone_Page_Set = std::set< Clone_Page, Less_Clone_Page >
	Set for storing unique page IDs. More...

Enumerations
enum	Clone_Handle_Type { CLONE_HDL_COPY = 1 , CLONE_HDL_APPLY }
	Clone handle type. More...

Variables
const uint	SNAPSHOT_DEF_CHUNK_SIZE_POW2 = 12
	Default chunk size in power of 2 in unit of pages. More...
const uint	SNAPSHOT_DEF_BLOCK_SIZE_POW2 = 6
	Default block size in power of 2 in unit of pages. More...
const uint	SNAPSHOT_MAX_BLOCK_SIZE_POW2 = 12
	Maximum block size in power of 2 in unit of pages. More...

Detailed Description

Database Physical Snapshot.

Typedef Documentation

Clone_File_Map

using Clone_File_Map = std::map<space_id_t, uint>

Map type for mapping space ID to clone file index.

Clone_File_Vec

using Clone_File_Vec = std::vector<Clone_file_ctx *>

Vector type for storing clone files.

Clone_Page_Set

using Clone_Page_Set = std::set<Clone_Page, Less_Clone_Page>

Set for storing unique page IDs.

Clone_Page_Vec

using Clone_Page_Vec = std::vector<Clone_Page>

Vector type for storing clone page IDs.

Enumeration Type Documentation

Clone_Handle_Type

enum Clone_Handle_Type

Clone handle type.

Enumerator
CLONE_HDL_COPY	Clone Handle for COPY.
CLONE_HDL_APPLY	Clone Handle for APPLY.

Variable Documentation

SNAPSHOT_DEF_BLOCK_SIZE_POW2

const uint SNAPSHOT_DEF_BLOCK_SIZE_POW2 = 6

Default block size in power of 2 in unit of pages.

Data transfer callback is invoked once for each block. This is also the maximum size of data that would be re-send if clone is stopped and resumed. For 16k page size, block size is 1M.

SNAPSHOT_DEF_CHUNK_SIZE_POW2

const uint SNAPSHOT_DEF_CHUNK_SIZE_POW2 = 12

Default chunk size in power of 2 in unit of pages.

Chunks are reserved by each thread for multi-threaded clone. For 16k page size, chunk size is 64M.

SNAPSHOT_MAX_BLOCK_SIZE_POW2

const uint SNAPSHOT_MAX_BLOCK_SIZE_POW2 = 12

Maximum block size in power of 2 in unit of pages.

For 16k page size, maximum block size is 64M.