[OpenAFS] openafs performance in an internet-scale traffic environment

Richard Human openafs@psychopuppy.net
Wed, 21 Feb 2007 20:41:03 +0200


Yes, although I haven't quite got my head around how I would fit the  
replicated volumes into the architecture. I was thinking of a  
scenario where I would have the r/w volume on one server in the cell  
and would replicate to at least 1 other server in the cell. So  
probably at least 3 servers in the cell. (Can you mix replicated r/o  
volumes and r/w volumes on one server?)

This fits with our application as uploads don't happen nearly as  
often and the source is an application server on the back-end. So we  
can push the files onto the r/w volume and then let them replicate  
out to the r/o volumes. We can even afford a delay of minutes here.

Does this make sense w.r.t. to AFS?

Anyway, I still need to go through a test setup, I'm just looking for  
a sanity check that this type of scale is possible with AFS and that  
I'm not trying something stupid.

Thanks for your reply

On 21 Feb 2007, at 8:21 PM, Christopher D. Clausen wrote:

> Richard Human <openafs@psychopuppy.net> wrote:
>> So we're looking at open-afs. We are thinking of a situation where we
>> have a cell of 2+ servers on the back-end with our data spread over a
>> number of volumes, that we can move around. This takes care of the
>> scalability issue. For redundancy we would investigate the volume
>> replication feature.
> You are aware that AFS replication is for read-only data?  You MUST
> write to the read-write volume and then vos release the data to the RO
> clones.
> <<CDC
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