Date: Mon, 6 Oct 2008 11:30:42 +0300 From: "Dimitar Vasilev" <dimitar.vassilev@gmail.com> To: "Andrew Snow" <andrew@modulus.org> Cc: freebsd-fs@freebsd.org Subject: Re: zfs as layer distributor Message-ID: <59adc1a0810060130j14a1707ao132e980dc5f17138@mail.gmail.com> In-Reply-To: <48E9C08C.8040108@modulus.org> References: <59adc1a0810051210t4a3503aci2bc06ba0aa5376c3@mail.gmail.com> <48E9556C.9060004@modulus.org> <59adc1a0810052225w6d8c1b78r226ffe8ca4ccf35d@mail.gmail.com> <48E9C08C.8040108@modulus.org>
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2008/10/6 Andrew Snow <andrew@modulus.org> > Dimitar Vasilev wrote: > >> Would love if someone to hear if someone has tested hardware raid6 and zfs >> over it. >> > > Yes, I am using 3ware RAID6 over 16 disks as a single volume, because we > also had UFS partitions that we wanted to keep. > > The performance is more than adequate, but not anywhere near if you used > them as single disks. Personally - based on prior experience with certain > hardware - I'd trust ZFS software raid over Areca hardware :-) > > How many disks do you have? If you can split up your disk pack into a group > of between 5 and 10 smaller RAIDs, that is the optimal range for ZFS > performance. > > > - Andrew I got 8 disks out of 12 possible. As the local reps of Areca told me - RAID6 is good over 12 disks. So next time I think I will go with raidz2 and pass-through. Best regards, Dimitar
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