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maintenance: add incremental-repack auto condition

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The incremental-repack task updates the multi-pack-index by deleting pack-
files that have been replaced with new packs, then repacking a batch of
small pack-files into a larger pack-file. This incremental repack is faster
than rewriting all object data, but is slower than some other
maintenance activities.

The 'maintenance.incremental-repack.auto' config option specifies how many
pack-files should exist outside of the multi-pack-index before running
the step. These pack-files could be created by 'git fetch' commands or
by the loose-objects task. The default value is 10.

Setting the option to zero disables the task with the '--auto' option,
and a negative value makes the task run every time.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Derrick Stolee
2020-09-25 12:33:38 +00:00
committed by Junio C Hamano
parent a13e3d0ec8
commit e841a79a13
3 changed files with 68 additions and 0 deletions
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31
builtin/gc.c
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@ -30,6 +30,7 @@
#include "promisor-remote.h"
#include "refs.h"
#include "remote.h"
#include "object-store.h"
#define FAILED_RUN "failed to run %s"
@ -1001,6 +1002,35 @@ static int maintenance_task_loose_objects(struct maintenance_run_opts *opts)
return prune_packed(opts) || pack_loose(opts);
}
static int incremental_repack_auto_condition(void)
{
struct packed_git *p;
int enabled;
int incremental_repack_auto_limit = 10;
int count = 0;
if (git_config_get_bool("core.multiPackIndex", &enabled) ||
!enabled)
return 0;
git_config_get_int("maintenance.incremental-repack.auto",
&incremental_repack_auto_limit);
if (!incremental_repack_auto_limit)
return 0;
if (incremental_repack_auto_limit < 0)
return 1;
for (p = get_packed_git(the_repository);
count < incremental_repack_auto_limit && p;
p = p->next) {
if (!p->multi_pack_index)
count++;
}
return count >= incremental_repack_auto_limit;
}
static int multi_pack_index_write(struct maintenance_run_opts *opts)
{
struct child_process child = CHILD_PROCESS_INIT;
@ -1156,6 +1186,7 @@ static struct maintenance_task tasks[] = {
[TASK_INCREMENTAL_REPACK] = {
"incremental-repack",
maintenance_task_incremental_repack,
incremental_repack_auto_condition,
},
[TASK_GC] = {
"gc",