maintenance: add incremental-repack auto condition
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>
diff --git a/Documentation/config/maintenance.txt b/Documentation/config/maintenance.txt
index c31613b..a0706d8 100644
--- a/Documentation/config/maintenance.txt
+++ b/Documentation/config/maintenance.txt
@@ -23,3 +23,12 @@
positive value implies the command should run when the number of
loose objects is at least the value of `maintenance.loose-objects.auto`.
The default value is 100.
+
+maintenance.incremental-repack.auto::
+ This integer config option controls how often the `incremental-repack`
+ task should be run as part of `git maintenance run --auto`. If zero,
+ then the `incremental-repack` task will not run with the `--auto`
+ option. A negative value will force the task to run every time.
+ Otherwise, a positive value implies the command should run when the
+ number of pack-files not in the multi-pack-index is at least the value
+ of `maintenance.incremental-repack.auto`. The default value is 10.
diff --git a/builtin/gc.c b/builtin/gc.c
index 8d22361..2b99596 100644
--- a/builtin/gc.c
+++ b/builtin/gc.c
@@ -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 @@
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 @@
[TASK_INCREMENTAL_REPACK] = {
"incremental-repack",
maintenance_task_incremental_repack,
+ incremental_repack_auto_condition,
},
[TASK_GC] = {
"gc",
diff --git a/t/t7900-maintenance.sh b/t/t7900-maintenance.sh
index 9e6ea23..55116c2 100755
--- a/t/t7900-maintenance.sh
+++ b/t/t7900-maintenance.sh
@@ -219,4 +219,32 @@
--no-progress --batch-size=2147483647 <run-2g.txt
'
+test_expect_success 'maintenance.incremental-repack.auto' '
+ git repack -adk &&
+ git config core.multiPackIndex true &&
+ git multi-pack-index write &&
+ GIT_TRACE2_EVENT="$(pwd)/midx-init.txt" git \
+ -c maintenance.incremental-repack.auto=1 \
+ maintenance run --auto --task=incremental-repack 2>/dev/null &&
+ test_subcommand ! git multi-pack-index write --no-progress <midx-init.txt &&
+ test_commit A &&
+ git pack-objects --revs .git/objects/pack/pack <<-\EOF &&
+ HEAD
+ ^HEAD~1
+ EOF
+ GIT_TRACE2_EVENT=$(pwd)/trace-A git \
+ -c maintenance.incremental-repack.auto=2 \
+ maintenance run --auto --task=incremental-repack 2>/dev/null &&
+ test_subcommand ! git multi-pack-index write --no-progress <trace-A &&
+ test_commit B &&
+ git pack-objects --revs .git/objects/pack/pack <<-\EOF &&
+ HEAD
+ ^HEAD~1
+ EOF
+ GIT_TRACE2_EVENT=$(pwd)/trace-B git \
+ -c maintenance.incremental-repack.auto=2 \
+ maintenance run --auto --task=incremental-repack 2>/dev/null &&
+ test_subcommand git multi-pack-index write --no-progress <trace-B
+'
+
test_done
