gvinum raid5 performance seems slow
killing at multiplay.co.uk
Sun Oct 29 17:59:36 UTC 2006
Steve Peterson wrote:
> I guess the fundamental question is this -- if I have a 4 disk
> subsystem that supports an aggregate ~100MB/sec transfer raw to the
> underlying disks, is it reasonable to expect a ~5MB/sec transfer rate
> for a RAID5 hosted on that subsystem -- a 95% overhead.
Absolutely not, when I was investigating RAID5 performance the quickest
option I found was linux's software RAID which gave performance of
270MB/s iirc across 5 * 400Gb Disks on a Highpoint 1820a.
While doing this I gave givnum a quick test and saw similar results
as you so gave up with it as I didnt have time to investigate further.
This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it.
In the event of misdirection, illegible or incomplete transmission please telephone +44 845 868 1337
or return the E.mail to postmaster at multiplay.co.uk.
More information about the freebsd-performance