[OpenAFS] OpenAFS with RAID
Wed, 28 Dec 2005 10:56:11 -0500
Quoting Paul Robins <firstname.lastname@example.org>:
> Derek, if you're reading this, i've tried yanking a drive before and
> the system doesn't crash, but any disk access hangs. I wish i could
> spec a higher quality controller but i have a feeling it will be
> rejected outright.
This test was done on a system that used software raid? I'll admit that
my test was on a PATA system, not SATA system. It was also a while ago,
on a 2.4 linux kernel (not 2.6). You seriously can't add $20 to each
machine to get better controllers?
> If either of you could weigh in on AFS on top of DRBD i'd appreciate
> it, I'm not fully up on whether a second server with an identical
> filesystem could be made to take over a crashed AFS machine. I
> appreciate all the help so far and wish there was a way i could
> donate back.
I've never used DRBD in any form, so I don't have any experience. All I CAN
say is repeat what has already been said: The namei fileserver (which is all
you get on Linux) doesn't care what the underlying block device or filesystem
you use for /vicepx -- so if DRBD looks like any other disk/filesystem then
yes, AFS can be built on top of it. Just make sure you never have the
same backend data served by two fileservers at the same time!
Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
Member, MIT Student Information Processing Board (SIPB)
URL: http://web.mit.edu/warlord/ PP-ASEL-IA N1NWH
warlord@MIT.EDU PGP key available