On Wed, Mar 4, 2009 at 12:18 PM, Richard Elling <richard.ell...@gmail.com>wrote:
> Vahid Moghaddasi wrote: > >> Thank you all for reply. I will do the recommendation and see if there is >> any change in performance. >> I had seen the documents in the link but I needed to make sure that we can >> not do anything to improve the performance before going to storage guys. >> > > You may not have much choice, actually. Recently, I was involved with a > large proof-of-concept where the "requirement" was hardware RAID-5. > After spending months proving it wouldn't scale, we finally convinced > the powers-that-be to make the critical LUNs mirrors. Afterwards, it scaled > rather nicely. Moral: you can spend a lot of efforts trying to put > lipstick on > a pig, and tune databases or ZFS to the max, but in the end, mirrors will > always kick butt over RAID-5. > -- richard > We will try to have the storage guys allocate a mirror to this server instead of a raid5 to see if that help. Thanks,
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