[OpenAFS] vice partition sizes, and large disks

[dj.byrne@jpl.nasa.gov]

> >Does it make sense to use the entire array as a single partition(~500GB)
> >or should we break it up.
[...]
> btw, i really really really wish ufs logging would work with the fileserver.
> i corrupted a couple src volumes when i tried this one.  saving the fsck
> time on the partitions after a crash would be a big win.

Likewise the salvage times.  Using file servers that are
SUN Ultra-1 with disksuite RAID-5, we have 3 16GB AFS partitions.
After a server crash (rare; usually hardware failure) we look
at 45 minutes of downtime while the OS fscks, and THEN AFS salvages.

Brutal for operations.  I don't have the times it would take if
we configured as a single 48 GB partition, but assume fsck and
salvages run in parallel, so would expect it'd be 3 times longer.

-- 
DJ Byrne       dj.byrne@jpl.nasa.gov
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