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Re: Slow checkout speeds over a local network and transfer hangs

From: Ian M. <ian_at_auricom.com>
Date: Fri, 10 Oct 2008 13:34:18 -0700 (PDT)

I just did a hotcopy to the local drive and I'll be switching the repo
path and testing some big transfers this weekend to see if performance

The issue with leaving the repo on the local drive is that the NAS is
a RAID and already backups to an attached usb disk that runs nightly.
The repository itself is 10GB at this point and represents about 6
months of work so the redundancy/backup is pretty important. There is
probably some combination of internal mirrored drives and backup
software that could be put in place to fix this IF this that turns out
to be the issue but ideally I'd like to continue using the NAS for

On Oct 10, 3:55 pm, Stefan Küng <tortoise..._at_gmail.com> wrote:
> Ian M. wrote:
> > Thanks for the response Andy.
> > As for the hangups:
> > I just checked the performance (its a Win 2003 server box) and it
> > pages/sec shoots to over a thousand when doing an update/commit, but
> > it still maintains a great deal of free ram (of an available 4GB). I'm
> > not really sure how to gauge the pages/sec in terms of what is good
> > and bad (especially after reading thishttp://support.microsoft.com/kb/139609
> > ), but it does seem to max out the performance graph.
> > One thing I should mention is that the Subversion runs on our server
> > here but the repository location is actually a network path to a
> > folder on the NAS. Would this potentially cause an issue? Its
> > difficult for me to test against this as we only have a single
> > mirrored drive in the server for the OS to run on and not enough space
> > to hotcopy a repository there for testing.
> Can't you put the repository on the local harddrive of the server?
> > As for the poor speeds:
> > I get about 60Mbps transferring files directly to the NAS that stores
> > the repositories (Gigabit network, but my laptop has 100Mb onboard),
> > so I'm lead to believe that I should be getting better speeds than 3Mb
> > when using local hostnames with checkouts. Of course this may relate
> > back to the performance issue.
> When accessing the repository, Subversion requires a *lot* of file
> accesses (the repository is basically a database, consisting of hundreds
> of files). That's why you will never get the full speed (except when
> transferring a very big file): for every file that svn accesses, there's
> a big overhead and delay because of the whole authentication/access
> control over the network (your NAS has to check whether the server
> process is even allowed to access those files).
> Stefan
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Received on 2008-10-10 22:34:50 CEST

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