From: Eric Wong <normalperson@yhbt•net>
To: Jon Nelson <jnelson@jamponi•net>
Cc: git@vger•kernel.org
Subject: Re: git-svn and *lots* of ssh connections
Date: Thu, 25 Jun 2009 02:49:20 -0700 [thread overview]
Message-ID: <20090625094919.GC2901@dcvr.yhbt.net> (raw)
In-Reply-To: <cccedfc60906100709r18364bc2h82d8e1a7ee0b8fd1@mail.gmail.com>
Jon Nelson <jnelson@jamponi•net> wrote:
> The company I work for (but do not speak for) uses svn (via ssh). I
> tried to use it; I really did. But I missed git and found svn quite
> honestly painful to use so I went to git-svn, and other than some
> caveats I'm pretty happy. However, one of the issues I've had with
> git-svn is fairly troublesome.
>
> Basically, during the fetch stage (or clone) git-svn uses a *ton* of
> ssh connections. Many dozens and in even with smaller projects well
> over a hundred. By "small" I mean a .git of less than 6MB and less
> than 60 files in the checkout. I've got 4MBit bandwidth available but
> frequently see only a single digit fraction of that going to the
> fetch/clone process. Is there anything that can be done to reduce the
> number of ssh connections involved? Why can't a single connection
> simple be re-used? I can't use "ssh connection sharing" for a variety
> of reasons that aren't relevant here.
>
> I'm using 1.6.0.2.
Hi Jon,
The actual connection setup/teardown is handled by the SVN Perl bindings
which gives git-svn little control over handling them. We actually try
to force a zero reference count to close a connection to an open SVN
repository.
Which OS/Perl version/SVN bindings version are you using?
Could the ssh processes just be zombies that didn't get reaped?
Does this happen when you clone a single directory with
--no-follow-parent? (no --stdlayout/-s option or --branches/--tags
switches, either). Can you test against an http/https/plain-svn
server and see if it happens there?
I could be talked into putting in a (nasty!) hack to start zapping
integer file descriptors when switching paths/repos and hope SVN closes
those; but that may not work...
--
Eric Wong
prev parent reply other threads:[~2009-06-25 9:49 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-10 14:09 git-svn and *lots* of ssh connections Jon Nelson
2009-06-11 7:52 ` Pascal Obry
2009-06-25 9:49 ` Eric Wong [this message]
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