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Re: Slowness of svn and http

From: Russell Glaue <rglaue_at_cait.org>
Date: 2003-07-21 16:05:49 CEST

I am the one who has been reporting the HTTP timeout issue.
Our repositories are 200 to 300 megabytes. It takes a very long time to
perform an svn checkout.
It takes even longer when we get an HTTP timeout error. We then have to
delete everything and check out again.

The slow down seems to be happening to us due to the number of files,
and not necessarily the size.
I want to guess that checking out 100 8K files is faster that 600 1K
files. Has anyone benchmarked this?
I have never benchmarked this, only sat in front of it almost falling
asleep while waiting.


On Friday, Jul 18, 2003, at 16:28 America/Chicago, Yanghui Bian wrote:

> You are not alone. :-)
> In my local computer, I have the apache server running and
> it takes quite long time to checkout my code from SVN while from CVS it
> takes only one fifth of the time.
> There might be something to tune SVN up.
> ybi
> -----Original Message-----
> From: plasma [mailto:plasmaball@pchome.com.tw]
> Sent: Friday, July 18, 2003 9:24 AM
> To: dev@subversion.tigris.org
> Subject: Re: Slowness of svn and http
> On Thu, Jul 17, 2003 at 10:48:21AM -0500, Ben Collins-Sussman wrote:
>> plasma <plasmaball@pchome.com.tw> writes:
>>> Today, I set up a svn network server, import source of mozilla 1.0,
>>> then check out.
>>> After one hour, I was still waiting checkout to finish. Isn't that
>>> too slow to be useful?
>> What metric are you using to measure speed? What is the definition of
>> "too slow"? The mozilla source is a *huge* dataset. How do you know
>> one hour is "too slow"?
>> Repeat the experiment with a cvs repository, compare the results, and
>> I'll listen to you. I want science here, not fuzzy feelings. :-)
> Sussman said I need to be scientific, so here comes the result.
> The server is FreeBSD 4.7. The client is my IBM X23, FreeBSD 4.8.
> I import mozilla 1.0's source, which is extracted from
> mozilla-source-1.0.tar.bz2, into a repository, then check out the
> source over LAN.
> 1. svn co http://$SVN_ROOT/mozilla-1.0 mozilla
> 172.907u 129.123s 1:54:06.76 4.4% 104+26171k 24311+933io 13pf+0w
> 2. svn co http://$SVN_ROOT/mozilla-1.0 mozilla
> 174.115u 130.746s 1:57:59.33 4.3% 104+26385k 23718+933io 5pf+0w
> 3. svn co svn+ssh://$SVN_ROOT/mozilla-1.0 mozilla
> 166.331u 109.494s 50:13.02 9.1% 104+24533k 23261+926io 0pf+0w
> 4. cvs -d :ext:$CVS_ROOT checkout mozilla
> 57.354u 48.390s 3:07.65 56.3% 204+1037k 269+430io 1pf+0w
> The difference between 1 and 2 is that 2 is invoked with
> "http-compression = no" at client side.
> As you can see, svn+http takes almost 2 hours to finish. svn+ssh is
> much better, 50 minutes. cvs+ssh just takes 3 minutes.
> I think I can say "It's slow" aloud now. :)
> plasma
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Received on Mon Jul 21 16:06:44 2003

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