[cvsnt] sspi auth issues

Gabriel Genellina gagsl-cvsnt at yahoo.com.ar
Tue Aug 29 16:04:37 BST 2006

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At Tuesday 29/8/2006 10:45, bwhicks at aep.com wrote:

>We have cvsnt running on redhat ES3.7. Almost all of our
>clients are running windows and we use the sspi protocol with winbind.
>One of our groups uses Cruise Control for automatic building. The userid
>used for this process is local to the linux box and uses sserver for
>connecting. When a build kicks off, the load on the linux box goes up to
>around 1.6 and other users' sspi authentication requests fail.
>Does anybody have any ideas about the cause or a possible workaround? A
>single user shouldn't be able to lock everyone else out like that...

This old message may be of interest:

>Subject: RE: [cvsnt] Strange CVS performance fluctuation
>Date: Wed, 21 Jun 2006 08:58:57 +1200
>Message-ID: <FB1D5769F12AF54EB58B29B12517B2650193AA9E at svmxc301.ap.aderant.com>
>Thread-Topic: [cvsnt] Strange CVS performance fluctuation
>From: "Trevor Leybourne" <trevor.leybourne at aderant.com>
>To: "Tobias Rodenbach" <tr.mailinglists at gmail.com>, <cvsnt at cvsnt.org cvsnt downloads at march-hare.com @CVSNT on Twitter CVSNT on Facebook>
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>Just some ideas and feedback if it will help,
>We've been having similar and significant problems here as well. Our CPU
>rarely goes above about 5-10% usage (even with 10-20 cvs.exe processes
>---- it's a fairly grunty Windows 2003 Server) and yet a checkout that
>would normally take less than 15 minutes will take more than a hour when
>multiple people are accessing it.
>Our IT guys have spent a lot of time evaluating the issue and the issues
>has been resolved as being disk contention (see timer results below).
>We found that running on a server with Raid 1 was costly and have moved
>the disk array to Raid 5 instead (no significant difference between SAN
>and LOCAL disk).
>Also, if you are using something like CruiseControl for your build
>process, look at the URL Build Trigger rather than the standared build
>trigger. The standard build trigger uses a CVS LOG command to look for
>changes and this is a significant process to run against a large
>We ran a test of having 3 PCs each running 3 concurrent checkouts
>against CVS. Here are the results against different disk configurations
>and are in Minutes. The repository size is around 850Mb and a checked
>out Sandbox is 540Mb (6,000 files in 250 folders)
>         (RAID5 Local) (RAID1 Local) (RAID5 SAN)
>Test1   14      77      15
>Test2   15      77      15
>Test3   14      76      15
>Test4   16      78      16
>Test5   16      77      16
>Test6   16      77      16
>Test7   16      72      17
>Test8   16      78      17
>Test9   16      79      16
>The CVS Server is and the client was
>-----Original Message-----
>From: cvsnt-bounces at cvsnt.org [mailto:cvsnt-bounces at cvsnt.org] On Behalf
>Of Tobias Rodenbach
>Sent: Wednesday, 21 June 2006 1:41 a.m.
>To: cvsnt at cvsnt.org cvsnt downloads at march-hare.com @CVSNT on Twitter CVSNT on Facebook
>Subject: [cvsnt] Strange CVS performance fluctuation
>I observed the following strange behaviour, when "many" people tried to
>access our cvs server (I counted about 35 instances of cvs.exe).
>Then, the CPU usage history of the Windows Task Manager shows that CPU
>Usage goes to about 50% for about 10 seconds, then drops to below 3% for
>about 10 seconds, rises to about 50% for 10 seconds and so on...
>Sometimes CPU usage stays high or low for more than 10 sec but most of
>the time it alternates in the 10 second scheme.
>In general, the performance is very low. Checking out using a tag (which
>is the most common case here) can take up to one hour for around 6 MB in
>the local LAN. ("Normally" that takes significantly less than one
>The host is a Win2003 server with 2 hyperthreading CPUs, the cvsnt
>server is version 2.5.02 build 2115.
>Does anyone have any idea what could be the reason for this behaviour?
>Best regards
>  Tobias

Gabriel Genellina
Softlab SRL 

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