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core.fsync: documentation and user-friendly aggregate options

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This commit adds aggregate options for the core.fsync setting that are
more user-friendly. These options are specified in terms of 'levels of
safety', indicating which Git operations are considered to be sync
points for durability.

The new documentation is also included here in its entirety for ease of
review.

Signed-off-by: Neeraj Singh <neerajsi@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Neeraj Singh
2022-03-15 12:12:45 -07:00
committed by Junio C Hamano
parent ba95e96d4c
commit b9f5d0358d
3 changed files with 65 additions and 3 deletions
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23
cache.h
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@ -1007,9 +1007,26 @@ enum fsync_component {
FSYNC_COMPONENT_INDEX = 1 << 4,
};
#define FSYNC_COMPONENTS_DEFAULT (FSYNC_COMPONENT_PACK | \
FSYNC_COMPONENT_PACK_METADATA | \
FSYNC_COMPONENT_COMMIT_GRAPH)
#define FSYNC_COMPONENTS_OBJECTS (FSYNC_COMPONENT_LOOSE_OBJECT | \
FSYNC_COMPONENT_PACK)
#define FSYNC_COMPONENTS_DERIVED_METADATA (FSYNC_COMPONENT_PACK_METADATA | \
FSYNC_COMPONENT_COMMIT_GRAPH)
#define FSYNC_COMPONENTS_DEFAULT (FSYNC_COMPONENTS_OBJECTS | \
FSYNC_COMPONENTS_DERIVED_METADATA | \
~FSYNC_COMPONENT_LOOSE_OBJECT)
#define FSYNC_COMPONENTS_COMMITTED (FSYNC_COMPONENTS_OBJECTS)
#define FSYNC_COMPONENTS_ADDED (FSYNC_COMPONENTS_COMMITTED | \
FSYNC_COMPONENT_INDEX)
#define FSYNC_COMPONENTS_ALL (FSYNC_COMPONENT_LOOSE_OBJECT | \
FSYNC_COMPONENT_PACK | \
FSYNC_COMPONENT_PACK_METADATA | \
FSYNC_COMPONENT_COMMIT_GRAPH | \
FSYNC_COMPONENT_INDEX)
/*
* A bitmask indicating which components of the repo should be fsynced.