Date: Wed, 20 Apr 2005 09:13:05 -0500 From: Eric Anderson <anderson@centtech.com> To: Claus Guttesen <kometen@gmail.com> Cc: freebsd-performance@freebsd.org Subject: Re: some simple nfs-benchmarks on 5.4 RC2 Message-ID: <42666371.9080800@centtech.com> In-Reply-To: <b41c7552050420070350db3315@mail.gmail.com> References: <b41c75520504190418308f94cc@mail.gmail.com> <b41c75520504190455542071f7@mail.gmail.com> <4264F8A8.3080405@centtech.com> <b41c755205041906145fc4719c@mail.gmail.com> <426507DC.50409@centtech.com> <b41c7552050419065519057cb2@mail.gmail.com> <42650EB2.4040409@centtech.com> <b41c75520504200117608f8e31@mail.gmail.com> <b41c7552050420014730ae39e1@mail.gmail.com> <426642D4.8000202@centtech.com> <b41c7552050420070350db3315@mail.gmail.com>
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Claus Guttesen wrote: >>That's about what I expected. RAID 5 depends on fast xor, so a slow processor >>in a hardware RAID5 box will slow you down a lot. >> >>You should try taking the two RAID5's (6 disks each) created on your original >>controller and striping those together (RAID 50) - this should get you some >>better performance, probably not as close as the amr device, but I would guess >>somewhere in the 80-90mb/s range. > > > This can't be done in hardware, since atabeast only supports raid 0, > 1, 4 and 5. But I will definitively have this in my mind this when we > get a new storage-system (a different one). > > Thank you for your guidance. You could use the atabeast to do two raid 5's, then use vinum to stripe those two. Eric -- ------------------------------------------------------------------------ Eric Anderson Sr. Systems Administrator Centaur Technology A lost ounce of gold may be found, a lost moment of time never. ------------------------------------------------------------------------
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