[522] in Info-AFS_Redistribution
Re: rs_aix31 server hints?
daemon@ATHENA.MIT.EDU (Steve_Lammert@transarc.com)
Wed Jan 15 13:53:36 1992
Date: Wed, 15 Jan 1992 11:53:08 -0500 (EST)
From: Steve_Lammert@transarc.com
To: paw@rigel.dartmouth.edu
Cc: Info-AFS@transarc.com
In-Reply-To: <9201151410.AA13915@northstar.dartmouth.edu>
Bob Oesterlin <oester+@rchland.ibm.com> writes:
> Excerpts from ext.misc.info-afs: 15-Jan-92 rs_aix31 server hints?
> paw%rigel.dartmouth.@RCH (532)
>
> > So - do you (who are running RS/6000 AFS file servers) do
> > anything funky with pv's, lv's, and partitions, or do you just
> > play it "straight" and have one (or more) partitions/disk?
>
> I *never* have my lv's span pv's. If one of the pv's goes belly up, then
> all of the other pv's are toast too! Just that much more data to restore.
In general, I agree with Bob. However, there are performance and
fragmentation tradeoffs for combining multiple disks into a single LV.
On our development file servers, which generally contain volumes whose
contents can be reconstructed fairly easily, we combine two WREN VIIs
in each LV and write a single 2 GB /vicepx file system. This lets us
pool our free space in fewer server partitions.
It also lets us have more disks than SCOUT could report on if each
disk were a separate partition! One server has six WREN VIIs attached
to each of two SCSI controllers, for 12 GB of available space. The
system disks are on a third controller.
Bob's right, though. If you're going to put five zillion home
directories on these disks, and you care about all of them, then
follow his advice.
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