Re: Poor HP Proliant RAID performance
From: Edmund White (ewwhite_at_mac.com)
Date: 06/27/04
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Date: 27 Jun 2004 00:14:10 -0700
Urban Cowboy <cowboy@therange.com> wrote in message news:<pan.2004.06.25.09.05.21.608450@therange.com>...
> I/O tests of HP Proliant DL and ML 3 series servers RAID performance
> running RH 9 and RHEL 3 has been poor. RAID5 write speeds under 25MBS and
> RAID0/1 speeds < 30MBS with U320 disks is less than expected. Controllers
> tested are Smart Array 5i and 641. Both versions of RH are the latest 2.4
> stock kernel and drivers. Best performance has been using Linux software
> RAID bypassing hardware RAID. Servers have P4 3 GHz processors and lots of
> RAM. HP positions these systems as workgroup servers. Anyone have more
> positive experiences with this hardware?
>
> UC
I've had great experiences with this hardware. My company standardized
on HP/Compaq Proliant hardware quite a bit ago. The real problem here
is the Redhat stock kernel. I still work with Redhat 8 because HP's
monitoring agents and drivers work the best with Redhat 7.2, 7.3 and
8.0. I use a custom kernel from kernel.org (usually 2.4.21 or 2.4.26)
and get acceptable performance (at levels above the numbers you
quoted) on HP ML 3xx hardware and Smart Array 64x and 64xx
controllers. I've resisted the move to RHEL 3.0 because I'd have to be
tied to the Redhat kernel and updates (otherwise, you defeat the
purpose of paying so much for the product). A good example is the
recent errata RHEL kernel. Tons of complaints about poor SCSI
performance.... Either way, the HP hardware is good stuff. I think
that since RHEL became the "supported" choice for Linux, the smaller
user base has caused the hardware vendors/manufactuters a few
problems.
https://rhn.redhat.com/errata/RHSA-2004-188.html
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