#include <log0handler_interface.h>

Public Attributes
bool	atomic_write
	If true, then the implementation supports "atomic writes", which means that if any of the bytes passed to write_mtr(...) becomes available to read() then all of the bytes passed in this call are also available. More...

bool	supports_clone
	CLONE assumes direct access to files in specific location and format. More...

bool	supports_meb
	MEB assumes direct access to files in specific location and format. More...

bool	supports_disabling
	Is ALTER INSTANCE DISABLE INNODB REDO_LOG supported? More...

bool	supports_encryption
	True if REDO log encryption is supported. More...

Member Data Documentation

◆ atomic_write

bool ib::redo::Handler_interface::Capabilities::atomic_write

If true, then the implementation supports "atomic writes", which means that if any of the bytes passed to write_mtr(...) becomes available to read() then all of the bytes passed in this call are also available.

In other words it's impossible for the Log to appear to end abruptly in between of boundaries of chunks passed to write_mtr(...). Note that it doesn't mean that write_mtr(...) call itself must succeed, or persist the data immediately - it only means that IF and WHEN the data becomes available to read() it must do so in an atomic way. Contrast this with implementation which has atomic_write=false, which may cause a prefix of a buffer passed to write_mtr(...) to become available to the read() - say, due to OS deciding to flush part of the cache to disk and to crash immediately afterwards - forcing the client to carefully analyze data returned by read(..) to detect such unfinished writes.

◆ supports_clone

bool ib::redo::Handler_interface::Capabilities::supports_clone

CLONE assumes direct access to files in specific location and format.

◆ supports_disabling

bool ib::redo::Handler_interface::Capabilities::supports_disabling

Is ALTER INSTANCE DISABLE INNODB REDO_LOG supported?

◆ supports_encryption

bool ib::redo::Handler_interface::Capabilities::supports_encryption

True if REDO log encryption is supported.

◆ supports_meb

bool ib::redo::Handler_interface::Capabilities::supports_meb

MEB assumes direct access to files in specific location and format.

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