jpeach at samba.org
Wed Apr 18 15:44:06 GMT 2007
On 18/04/2007, at 5:08 AM, jiri sasek - Sun Microsystems - Prague
Czech Republic wrote:
> Hi all
> We have the following problem:
> - QA team using netbench raised a problem to having a >20%
> performance regression on samba shares between the 3.0.21c and
> 3.0.24 versions of samba.
Try comparing packet traces of 3.0.21c and 3.0.24.
> - we tried to reproduce it by smbtorture using the Tridge's
> client.txt and we obtained the performance diffs between the
> 3.0.0-3.0.9-3.0.10-3.0.21c-3.0.24 "flat" (diffs was no more than 1-2%)
yes, unfortunately this is not always predictive of actual windows
> - we trying to find a root cause of this different results. We found
> the client.txt was obtained snooping the traffic of the NetBench of
> the version ~=3.
> - is there anybody who has the client.txt derived from the NetBench
> v7 traffic or who is experienced with the creating it?
I believe that samba4 has a backend that is capable of creating
workload files, though I've never experimented with it.
> - is anybody know the differences which can cause such performance
IIRC the default for "msdfs root" changed to "yes" around this time.
We found that enabling this causes windows clients to do a lot more
requests, with a corresponding drop in (netbench) performance.
James Peach | jpeach at samba.org
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