summaryrefslogtreecommitdiff
path: root/unpack-trees.c
diff options
context:
space:
mode:
authorNguyễn Thái Ngọc Duy <pclouds@gmail.com>2014-06-13 19:19:36 +0700
committerJunio C Hamano <gitster@pobox.com>2014-06-13 11:49:39 -0700
commit5fc2fc8fa22312efca46ed5321fa1d3b4d537a72 (patch)
tree14ddb4fa9d4967a96f27ea621b1cedb083f5d727 /unpack-trees.c
parente93021b20a73af8ff51f9ddd8c98f44fd103f360 (diff)
downloadgit-5fc2fc8fa22312efca46ed5321fa1d3b4d537a72.tar.gz
read-cache: split-index mode
This split-index mode is designed to keep write cost proportional to the number of changes the user has made, not the size of the work tree. (Read cost is another matter, to be dealt separately.) This mode stores index info in a pair of $GIT_DIR/index and $GIT_DIR/sharedindex.<SHA-1>. sharedindex is large and unchanged over time while "index" is smaller and updated often. Format details are in index-format.txt, although not everything is implemented in this patch. Shared indexes are not automatically removed, because it's unclear if the shared index is needed by any (even temporary) indexes by just looking at it. After a while you'll collect stale shared indexes. The good news is one shared index is useable for long, until $GIT_DIR/index becomes too big and sluggish that the new shared index must be created. The safest way to clean shared indexes is to turn off split index mode, so shared files are all garbage, delete them all, then turn on split index mode again. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'unpack-trees.c')
-rw-r--r--unpack-trees.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/unpack-trees.c b/unpack-trees.c
index f594932080..a941f7c33e 100644
--- a/unpack-trees.c
+++ b/unpack-trees.c
@@ -8,6 +8,7 @@
#include "progress.h"
#include "refs.h"
#include "attr.h"
+#include "split-index.h"
/*
* Error messages expected by scripts out of plumbing commands such as
@@ -1046,6 +1047,9 @@ int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options
o->result.timestamp.sec = o->src_index->timestamp.sec;
o->result.timestamp.nsec = o->src_index->timestamp.nsec;
o->result.version = o->src_index->version;
+ o->result.split_index = o->src_index->split_index;
+ if (o->result.split_index)
+ o->result.split_index->refcount++;
hashcpy(o->result.sha1, o->src_index->sha1);
o->merge_size = len;
mark_all_ce_unused(o->src_index);