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SubjectRe: Major XFS problems...
On Wed, Sep 08, 2004 at 02:35:24PM +0200, Jakob Oestergaard wrote:
>
> First XFS bug:
> ---------------
> http://oss.sgi.com/bugzilla/show_bug.cgi?id=309

I've shared your frustration this summer:

http://bugzilla.kernel.org/show_bug.cgi?id=2840
http://bugzilla.kernel.org/show_bug.cgi?id=2841
http://bugzilla.kernel.org/show_bug.cgi?id=2929
http://bugzilla.kernel.org/show_bug.cgi?id=3118


but after 2.6.8.1 and going back to 8K stacks, my fileserver has been
stable.

> XFS causes lowmem oom, triggering the OOM killer. Reported by
> as@cohaesio.com on the 18th of august.

Have you tried if this helps:

sysctl -w vm.vfs_cache_pressure=10000
Fixed oom-killer problems for me on 2.6.8-rc2. It was very eager to
kill the backup (tivoli storage manager) client. Haven't needed it so
far on 2.6.8.1.

> A little info on the hardware:
> Big server Small server
> ---------------------- -----------------------
> Intel Xeon Dual Athlon MP
> 7 external SCSI disks 4 internal IDE disks
> IBM hardware RAID Software RAID-1 + LVM
> 600+ GB XFS ~150 GB XFS
> 17+ M files ~1 M files


Dual pentium-III (IBM x330)
2 TB Infortren Eonstore, fibre channel
500 GB in use
~5 M files


Also have another dual Xeon (Dell PowerEdge 2650) with ~1 TB on XFS,
but that's running 2.4.20-30.8.XFS1.3.1smp, and has never had any
problems.

>
> Does anyone actually use XFS for serious file-serving?

Yes,

>
> If XFS is a no-go because of lack of support, is there any realistic
> alternatives under Linux (taking our need for quota into account) ?
>
> And finally, if Linux is simply a no-go for high performance file
> serving, what other suggestions might people have? NetApp?

My impression so far has been more that the 2.6-series might not yet
have been stable enough. Have had to be chasing the leading/bleeding
edge to get away from the known problems. Was looking forward to a
real "maintainer" taking over this series, but that doesn't seem to be
happening..


-jf
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