[OpenAFS] Performance

[egon@premiernetworks.net]

I am getting ready to do some pretty heavy (several days worth) of benchmarking on some new 1.6TB RAID5 arrays that we are rolling out.  Primarily I am performance testing identical hardware with varying filesystems (RFS, JFS, XFS) but we are going to be using OpenAFS so it will be involved also. I will post my results if it is the sort of information you're looking for.

E. Egon Rinderer
Premier Networks
St. Louis, MO / St. Croix, USVI
314-221-9058
www.premiernetworks.net

>I see pretty bad performance to tell you the
>truth.
>I can read and write ~60mb/s directly to my raid
>array, but when using 
>OpenAFS (locally or remotely) to the same array, I
>get around 6-10MB/s, 
>I have seen up to 25MB/s over a peice of 1000Mbps
>fibre. Client and 
>Server are both dual P3-1ghz with 1024mb ram. I
>notice the context 
>switches on the server at this time jump to
>~10000/s, and on the client 
>~40000/s. I imagine this is the source of my
>slowdown, but I havn't had 
>a chance to look into it.
>
>I'd be interested if anyone else has the same
>level of context switches 
>going on.
>
>This is while doing a large sequential write
>operation (dd if=/dev/zero 
>of=/afs/alb-nz.esphion.com/public/dd.out bs=256k
>count=4096).
>
>Nathan
>
>Michael Robokoff wrote:
>
>> Does anyone have any Open AFS performance
>information they can share 
>> with me. I plan on doing a couple benchmarks and
>I would like to have 
>> some idea of what to expect.
>>
>> Thanks a bunch!
>>
>> --Mike
>>
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