Re: Raid5 Vs Raid0+1 -- Raw Vs Solaris 9 Concurrent Direct IO UFS

As the Japanese car maker said: I hate to see 'dat Sun go down.

Gogala, Mladen wrote:

> 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.


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