From: Michael Blancas (mblancas@gmail.com)
Date: Tue Oct 19 2004 - 06:13:42 EDT
Hi,
I'm running a mail server and web server for 30k users on a E450 using
an A1000 (single) as storage. I just bought refurbed A3000 and D1000
and I'm planning to migrate the home directories to this new storage
device. I need more IO throughput.
My A1000 is configured using a 12 volume raid5. Problem is when one
disk dies, even at the slowest rebuilding, IO is severely affected,
mails get stuck on queue and is not committed to disk, mail download
via pop3/imap extremely/horribly slow.
I have 2 A3000, 4 D1000 and 12 36GB drives in my inventory. I'm
planning to use 2 drives as hot spares. I don't have Veritas file
system and Veritas volume manager. I will only be using UFS on solaris
8. What would be the best configuration for the new storage. I'm
looking at the following options:
1 A3000 + 2 D1000, 5 way raid5 on each D1000 and use disksuite to
stripe the two raid5 volumes.
1 A3000 + 2 D1000, 10 way raid5, 5 disks on each D1000.
1 A3000 + 4 D1000, 12 way raid5 disks distributed across the 4 D1000's
no hot spare.
2 A3000 + 4 D1000's 2 each, 3 disks per D1000, 2 raid5 volumes striped
using disksuite
As much as possible, I don't want to encounter the IO bottlenect
during rebuilds that I encounter with the A1000. Any suggestions would
be appreciated.
Another thing, I have temporarily disabled user quotas as boot up is
slow when using quotad. I'm already using LDAP with PAM. Any
suggestions on how to implement user quotas?
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