Is running 'git gc' regularly still recommended if 'gerrit gc' is used?

[Jyrki Puttonen]

Hi

Wiki page about scaling [1] says following in section called Git GC:

    Running GC regularly is important, jgit does not have built in gc so unlike a regular git repo it will not auto run every now and then. Setting up a crontab is probably a good idea.

Is this valid when 'gerrit gc' [2] is used?


[1] http://code.google.com/p/gerrit/wiki/Scaling
[2] http://gerrit-documentation.googlecode.com/svn/Documentation/2.6/cmd-gc.html

[Edwin Kempin]

Yes, you should use 'gerrit gc' to do the garbage collection.
Running 'gerrit gc' also creates bitmaps for better clone and fetch performance.
However you still need a cronjob to run 'gerrit gc', AFAIK jgit still doesn't run gc automatically.

2013/6/25 Jyrki Puttonen <jyrk...@gmail.com>

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[Shawn Pearce]

On Mon, Jun 24, 2013 at 9:20 PM, Jyrki Puttonen <jyrk...@gmail.com> wrote:

Hi

Wiki page about scaling [1] says following in section called Git GC:

    Running GC regularly is important, jgit does not have built in gc so unlike a regular git repo it will not auto run every now and then. Setting up a crontab is probably a good idea.

Is this valid when 'gerrit gc' [2] is used?

No. JGit now has gc available, this is what gerrit gc calls. You can use either program to maintain the repositories.

[Martin Fick]

Although if you use gerrit gc, you should still run git pack-refs
regularly, gerrit (jgit) gc does not pack refs,

-Martin

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[Saša Živkov]

On Tue, Jun 25, 2013 at 4:36 PM, Martin Fick <mf...@codeaurora.org> wrote:

On Tuesday, June 25, 2013 07:23:51 am Shawn Pearce wrote:
> On Mon, Jun 24, 2013 at 9:20 PM, Jyrki Puttonen
<jyrk...@gmail.com> wrote:
> > Hi
> >
> > Wiki page about scaling [1] says following in section called
Git GC:
> >     Running GC regularly is important, jgit does not have
built in gc so
> >
> > unlike a regular git repo it will not auto run every now and
then.
> > Setting up a crontab is probably a good idea.
> >
> > Is this valid when 'gerrit gc' [2] is used?
>
> No. JGit now has gc available, this is what gerrit gc calls.
You can use
> either program to maintain the repositories.

Although if you use gerrit gc, you should still run git pack-refs
regularly, gerrit (jgit) gc does not pack refs,

 

Strange. I checked the JGit code and it does call packRefs method from

the gc method.

-Martin

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The Qualcomm Innovation Center, Inc. is a member of Code Aurora
Forum, hosted by The Linux Foundation

[Martin Fick]

My bad, I miss understood something,

[Ishaaq Chandy]

Hmmm. I had previously scheduled cron to run a weekly script that called "git gc" on all the projects on the server's local file system, but if "gerrit gc" is the recommended way to do it now, I need to work out how to call it from cron.

My problem is that cron doesn't have the ssh private key required to be able to call "gerrit gc" over ssh. So, is there any way to call it (or something else that does the equivalent) without using ssh?

Thanks,

Ishaaq

[Dave Borowitz]

As Shawn mentioned, you can use JGit's gc directly. The easiest thing is probably to download the latest version of jgit.sh from Eclipse[1], which is new enough it should have gc. A more correct thing is probably to get the exact version of JGit used by your Gerrit version (check the top-level pom.xml in the source tree for the version). I don't think we build jgit.sh for each of those releases, so you might have to build it yourself in that case.

[1] http://www.eclipse.org/jgit/download/ 

[Shawn Pearce]

On Sun, Jun 30, 2013 at 4:26 PM, Ishaaq Chandy <ish...@gmail.com> wrote:
> My problem is that cron doesn't have the ssh private key required to be able
> to call "gerrit gc" over ssh. So, is there any way to call it (or something
> else that does the equivalent) without using ssh?

Isn't GC a global capability now?

Create a role account for cron, configure an SSH key that cron does
have access to, put the role account into a group, and grant the group
GC capability?