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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Raid5 Vs Raid0+1 -- Raw Vs Solaris 9 Concurrent Direct IO UFS
> But it also have to compute checksums and wait for
> all
> disks to complete I/O before returning the result.
> In
> my experience, RAID-5 (EMC-Clariion) was not faster
> then
> Symmetrix configured for RAID 1+0. There are great
> adds
> for RAID-5 at http://www.baarf.com written by Art
> Kagel and
> James Morle, and a great add for RAID-5 on
> http://www.hotsos.com
> called "Configuring Oracle for VLDB" by Cary
> Millsap. Also worth
> reading is an article by Hank Tulis called "Aligning
> Oracle Blocks
> with Hardware Stripe Boundaries" which can also be
> found on Hotsos
> and which gives fairly good understanding of the
> issues with Oracle
> and Raid. You should read those articles and show
> them to your SUN
> representative. If he persists, then take the latest
> edition of Tom
> Kyte's expert 1-on-1 and shove it up
> his...intestines. Tom's book
> was selected for size, not for any other reason. You
> can use
> Encyclopedia Britannica or Yellow Pages for NYC
> instead.
>
> --
> Mladen Gogala
> A & E TV Network
> Ext. 1216
Mladen,
no one _has_ to configure an EMC Clarion (e.g. CX200) as RAID 5. a client is running one with 30 drives (28 hot) as 2 x 8 drives as RAID 10, 1 x 4 drives RAID 10 and 4 x 2 RAID 1 just fine (balance as hot spares).
I got to use 3 redo log members per group. sometimes dreams do come true. :)
an entire external unit, with no RAID 5 whatsoever. If the drivers for the FCHBAs would just be stable, you could not shut me up about performance.
If.
It did take quite a bit of asserting, though, to not end up with RAID 5 under the hood. After all, if had 1 GB of cache. baarf.
Pd
-- Archives are at http://www.freelists.org/archives/oracle-l/ FAQ is at http://www.freelists.org/help/fom-serve/cache/1.html -----------------------------------------------------------------Received on Thu Aug 26 2004 - 01:53:52 CDT
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