[EMAIL PROTECTED] writes:
}Tim -
}I set up AFS vice partitions on a Digital Alpha 8400 using RAIDs
}sitting behind HSZ hardware controllers. RAID sizes were about 25 and
}50 GB.
Hmm, well not having *that* kind of money, we're using
Alpha 1000's with the 3-channel PCI Raid controller (KZPSC).
We are using RAID-5 (7 4.3GB FW per channel), which works
out to ~25GB logical drive. When we set this up there
was a smallish limit to the number of afs volumes per
vice partitition so I have to partition those into 4
partitions of ~6GB each. Typically we have 12 of
these partitions per server (~75GB/server). When we
raised one server to ~100GB we basically "fell over"
the knee of the performance curve (everything went
to h*ll). This didn't actually seem to be related
to the amount of diskpace (rather more diskspace
meant more clients accessing this server in our case).
Sadly, the AFS fileserver comes no where close to
driving this hardware as fast as it is capable of.
Doing a "dd" to those disks gives ~12-15MB/s, but
I've never gotten more than 3.5MB/s through AFS
(heck, FTP can get twice that).
John
--
John Hascall, Software Engr. Shut up, be happy. The conveniences you
ISU Computation Center demanded are now mandatory. -Jello Biafra
mailto:[EMAIL PROTECTED]
http://www.cc.iastate.edu/staff/systems/john/welcome.html <-- the usual crud
