log Directory Reference

Directory dependency graph for log:

Files
file	log0buf.cc
	Redo log buffer implementation, including functions to:
file	log0chkp.cc
	Redo log checkpointing.
file	log0consumer.cc
file	log0ddl.cc
	DDL log.
file	log0encryption.cc
file	log0files_capacity.cc
	physical_capacity (total size on disk except tmp files) | +- *2/LOG_N_FILES | ("snake's head&tail cages") | +- *FREE_RATIO ("the snake's body") | +- OVERHEAD | (space which shouldn't be used for deltas) | | | +- (LOG_N_FILES - 1) * LOG_FILE_HDR_SIZE | | (file headers in cages with snake's body) | | | +- LOG_EXTRA_SAFETY_MARGIN | (just in case) | +- lsn_capacity (space to use for deltas) | +- next_file_earlier_margin | ("snake's tongue" - we want to never need more than LOG_N_FILES-1) | +- hard_logical_capacity (this is how log writer sees the capacity) | +- *LOG_EXTRA_WRITER_MARGIN_PCT/100 | (log writer's private workspace to pull of "desperate rescue") | +- soft_logical_capacity (this is how threads other than log writer see the capacity) | +- free_check_margin | (it's "reserved" - you may write to it, if you did reservation) | | | +- concurrency_margin
file	log0files_dict.cc
	Redo log - in-memory dictionary of log files (their meta data).
file	log0files_finder.cc
	Redo log - finding log files and inspecting their meta data.
file	log0files_governor.cc
	Redo log files - governor.
file	log0files_io.cc
file	log0log.cc
	Redo log system - provides durability for unflushed modifications to contents of data pages.
file	log0meb.cc
file	log0pfs.cc
file	log0pre_8_0_30.cc
	Redo log - functions related to redo formats before 8.0.30.
file	log0recv.cc
	Recovery.
file	log0test.cc
	Tools used to test redo log in gtests (log0log-t.cc).
file	log0write.cc
	Redo log writing and flushing, including functions for: