[Gluster-devel] glusterfs speed

[Craig Tierney]

Anand Avati wrote:
>> I realise that the speed of the glusterfs will be lower than NFS, but
>> for my tests, I can get the speed to be similar (linespeed) for large
>> files, but for small files NFS is much faster. I have tried using
>> server-to-server AFR and client-based AFR, with and without unify, with
>> and without the various performance volumes as recommended in the
>> documentation. But I haven't been able to find a setup that is faster
>> than 1/3 the speed of NFS for small files.
>>
>> I'm wondering if anyone could post their config files for the server and
>> client that has reasonable performance for small files (this is going to
>> be for web data so most files are <50kb)
> 
> 
> If you are looking at serving static files via web, you might be interested
> in mod_glusterfs (available in the glusterfs--mainline--3.0 branch).
> mod_glusterfs is currently available for apache-1.3, lighttpd-1.4 and
> lighttpd-1.5 (we are working on apache2 support).
> 
> http benchmarks show mod_glusterfs boosts the performance significantly,
> especially for small files (by avoiding the fuse context switch overhead)
> 

I have found the same performance issues as reported in the initial thread.
The the root cause of the slower performance for small files is mainly
due to the fuse context switch overhead?

If so, are there plans on the roadmap to write a proper kernel implementation
of the client?

Thanks,
Craig



> avati
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> 


-- 
Craig Tierney (craig.tierney at noaa.gov)