[OpenAFS] San Storage & AFS servers

[Steve Devine]

Russ Allbery wrote:

>Steve Devine <sdevine@msu.edu> writes:
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>>Looks like we are getting a SAN. Anyone out there using a SAN for your
>>afs file servers?
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>Yup, we're using SAN pretty extensively.
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>>Any gotchas out there? My understanding is that the lun looks like an
>>attached local drive so I can't imagine it won't work.
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>Not really, no.  As soon as you get the storage available as a drive, AFS
>just works fine.
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>>The question is whether its a good use of expensive storage.
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>If you get more reliability out of SAN disk, then it depends on whether
>you put critical data into AFS.  We certainly do, so we've been happy
>with the additional reliability we get from our SAN.
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I question how best to configure our servers. Currently we have Dell 
Poweredges with dual controllers attached to split bus disk shelves 
with  ( 10 )36gig drives mirrored to provide (5 )36Gig volumes that we 
mount as /vicepa  /vicepb ; etc.
Do we set up one lun as /vicepa and make it say 180 Gig as this would 
represent the aggregate size of the old disk shelves?
Or can I go up to 256/ 512 Gig?  I realize this is not something that 
can be objectively answered (My mileage may vary).
I am interested however in how others have configured their file servers 
and what size they are setting their volumes.

Thanks for your help.
/sd

-- 
Steve Devine
Storage Systems
Academic Computing & Network Services
Michigan State University

301 Computer Center
East Lansing, MI 48824-1042
1-517-432-7327

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