From: Stefan Beller <sbeller@google.com>
To: git@vger.kernel.org
Cc: gitster@pobox.com, peff@peff.net, torvalds@linux-foundation.org,
Stefan Beller <sbeller@google.com>
Subject: [PATCH] Enable core.fsyncObjectFiles by default
Date: Tue, 23 Jun 2015 14:57:23 -0700 [thread overview]
Message-ID: <1435096643-18159-1-git-send-email-sbeller@google.com> (raw)
Linus Torvalds started a discussion[1] if we want to play rather safe
than use defaults which make sense only for the most power users of Git:
> So git is "safe" in the sense that you won't really lose any data,
> but you may well be inconvenienced. The "fsync each object" config
> option is there in case you don't want that inconvenience, but it
> should be noted that it can make for a hell of a performance impact.
> Of course, it might well be the case that the actual default
> might be worth turning around. Most git users probably don't
> care about that kind of "apply two hundred patches from Andrew
> Morton" kind of workload, although "rebase a big patch-series"
> does end up doing basically the same thing, and might be more
> common.
This patch enables fsync_object_files by default.
[1] https://plus.google.com/u/1/+JonathanCorbet/posts/JBxiKPe3VXa
Signed-off-by: Stefan Beller <sbeller@google.com>
---
Documentation/config.txt | 8 ++++----
environment.c | 2 +-
2 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/Documentation/config.txt b/Documentation/config.txt
index 43bb53c..dce2640 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -693,10 +693,10 @@ core.whitespace::
core.fsyncObjectFiles::
This boolean will enable 'fsync()' when writing object files.
+
-This is a total waste of time and effort on a filesystem that orders
-data writes properly, but can be useful for filesystems that do not use
-journalling (traditional UNIX filesystems) or that only journal metadata
-and not file contents (OS X's HFS+, or Linux ext3 with "data=writeback").
+This ensures objects are written to disk instead of relying on the
+operating systems cache and eventual write. Disabling this option will
+yield performance with a trade off in safety for repository corruption
+during power loss.
core.preloadIndex::
Enable parallel index preload for operations like 'git diff'
diff --git a/environment.c b/environment.c
index 61c685b..b406f5e 100644
--- a/environment.c
+++ b/environment.c
@@ -35,7 +35,7 @@ const char *git_attributes_file;
int zlib_compression_level = Z_BEST_SPEED;
int core_compression_level;
int core_compression_seen;
-int fsync_object_files;
+int fsync_object_files = 1;
size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
size_t delta_base_cache_limit = 96 * 1024 * 1024;
--
2.4.1.345.gab207b6.dirty
next reply other threads:[~2015-06-23 21:57 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-23 21:57 Stefan Beller [this message]
2015-06-23 22:21 ` [PATCH] Enable core.fsyncObjectFiles by default Junio C Hamano
2015-06-23 23:29 ` Theodore Ts'o
2015-06-24 5:32 ` Junio C Hamano
2015-06-24 14:30 ` Theodore Ts'o
2015-06-24 1:07 ` Duy Nguyen
2015-06-24 3:37 ` Jeff King
2015-06-24 5:20 ` Junio C Hamano
-- strict thread matches above, loose matches on Subject: below --
2018-01-17 18:48 [PATCH] enable " Christoph Hellwig
2018-01-17 19:04 ` Junio C Hamano
2018-01-17 19:35 ` Christoph Hellwig
2018-01-17 20:05 ` Andreas Schwab
2018-01-17 19:37 ` Matthew Wilcox
2018-01-17 19:42 ` Christoph Hellwig
2018-01-17 21:44 ` Ævar Arnfjörð Bjarmason
2018-01-17 22:07 ` Linus Torvalds
2018-01-17 22:25 ` Linus Torvalds
2018-01-17 23:16 ` Ævar Arnfjörð Bjarmason
2018-01-17 23:42 ` Linus Torvalds
2018-01-17 23:52 ` Theodore Ts'o
2018-01-17 23:57 ` Linus Torvalds
2018-01-18 16:27 ` Christoph Hellwig
2018-01-19 19:08 ` Junio C Hamano
2018-01-20 22:14 ` Theodore Ts'o
2018-01-20 22:27 ` Junio C Hamano
2018-01-22 15:09 ` Ævar Arnfjörð Bjarmason
2018-01-22 18:09 ` Theodore Ts'o
2018-01-23 0:47 ` Jeff King
2018-01-23 5:45 ` Theodore Ts'o
2018-01-23 16:17 ` Jeff King
2018-01-23 0:25 ` Jeff King
2018-01-21 21:32 ` Chris Mason
2020-09-17 11:06 ` Ævar Arnfjörð Bjarmason
2020-09-17 14:14 ` Christoph Hellwig
2020-09-17 15:30 ` Junio C Hamano
2018-01-17 20:55 ` Jeff King
2018-01-17 21:10 ` Christoph Hellwig
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