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Re: Recomendations on raid controllers raid 1+0
- From: "Scott Marlowe" <scott(dot)marlowe(at)gmail(dot)com>
- To: "Leigh Dyer" <leigh(at)eclinic(dot)com(dot)au>
- Cc: "Glyn Astill" <glynastill(at)yahoo(dot)co(dot)uk>, "Guillaume Smet" <guillaume(dot)smet(at)gmail(dot)com>, pgsql-performance(at)postgresql(dot)org
- Subject: Re: Recomendations on raid controllers raid 1+0
- Date: Thu, 13 Mar 2008 23:53:41 -0600
On Thu, Mar 13, 2008 at 5:14 PM, Leigh Dyer <leigh(at)eclinic(dot)com(dot)au> wrote: > Glyn Astill wrote: > > Bonie++ benchmarks below. > > > > I believe the the Perc 5/i Raid 10 mode is actually a span of mirrors, rather than the expected stripe of mirrors we should expect from 1+0, and that this is the reason for the shitty performance. > > > > Could you build three RAID-1 mirrors on the device, and then stripe that > using software RAID-0? That can be a useful option. You'd have to test it on your setup, but RAID-0 is dead simple, so letting the kernel handle the RAID-0 part is pretty low cost. Especially if you've got lots of CPU power, like many of today's servers.
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- Re: Recomendations on raid controllers raid 1+0
- From: Glyn Astill
- Re: Recomendations on raid controllers raid 1+0
- From: Leigh Dyer
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