Date: Wed, 18 Jun 2003 12:24:41 -0700 From: "Jin Guojun [DSD]" <j_guojun@lbl.gov> To: Doug Clements <dclements@linkline.com> Cc: agent dero <dero@bluhayz.org> Subject: Re: freebsd-performance Digest, Vol 4, Issue 7 Message-ID: <3EF0BC78.59821B8C@lbl.gov> References: <20030614190033.7F0DE37B407@hub.freebsd.org> <20030615091254.M85497@bluhayz.org> <3EF0B507.2B1B6FDF@lbl.gov> <20030618185739.GE2215@linkline.com>
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Doug Clements wrote:
> On Wed, Jun 18, 2003 at 11:52:55AM -0700, Jin Guojun [DSD] wrote:
> > Recently, we tested software RAID via CCD and VINUM, and compared
> > them to adaptec 2xxx RAID controller. The performance is the same.
> > The CPU are Xeon 2.8 GHz, SuperMicro MB with ServerWork Chipset.
> > Seagate 3147xxxxLC drives.
> >
> > Problem is the write is slow for all of them, especially when multiple writes.
> >
> > Heard from Adaptect that their 5400 RAID has best performance, but
> > never had one for testing.
> >
> > So, soft RAID is ok to save bucks for hardware.
>
> How was CPU usage during the tests?
Very minimum.
It was slow on SCSI bus , but I do not have time to diagnose,
which can be very time consuming.
-Jin
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