Re: RAID-5 STRIPING SIZE ON WINDOWS NT SERVER

Jonathan:

Good question. I'll have to check to be sure, but I believe that by using an 8K stripe size (assuming hardware level raid) it will write 8K blocks per device. Actually, this probably varies according to the mfg of the RAID adapter (again assuming hardware RAID). For software RAID, I believe NT does the same thing, although I've never used the software RAID.

Regards,

--
David C. Sisk
Need tech info on Oracle? Visit The Unofficial ORACLE on NT site at http://www.ipass.net/~davesisk/oont.htm Like original music? Listen to song samples and buy a CD at http://www.mp3.com/disparityofcult

Jonathan Lewis wrote in message
<932932523.18216.0.nnrp-13.9e984b29_at_news.demon.co.uk>...
>
>Question:
>
>When asking for a stripe size, does NT mean
>the amount of data to be written to a single
>physical device before moving on to the next
>device - or does it mean the total amount of
>data within a single stripe that covers all the
>relevant devices ?
>
>The terminology I am more used to on Unix
>boxes is:
>
>stripe size -
> amount of data in a single stripe that crosses
> all disks in the stripe set
>
>chunk size -
> amount of data per disk (in a stripe).
>
>So an 8K CHUNK size on a 5-disk raid-5
>set would cater for a 40K stripe size (which
>means an effective 32K of data in a stripe,
>which might be appropriate in some cases)
>whilst an 8K STRIPE size would mean a
>complete disaster if the system got a little
>busy.
>
>
>--
>
>Jonathan Lewis
>Yet another Oracle-related web site: www.jlcomp.demon.co.uk
>
>David Sisk wrote in message ...
>>I'd say, make it the same size as the database block size. For most
>>applications, 8K seems to work well for both.
>>
>>Regards,
>>
>>--
>>David C. Sisk
>>Need tech info on Oracle? Visit The Unofficial ORACLE on NT site at
>>http://www.ipass.net/~davesisk/oont.htm
>>Like original music? Listen to song samples and buy a CD at
>>http://www.mp3.com/disparityofcult
>>
>>
>>Scott wrote in message <379a86cd.351266724_at_news.localnet.com>...
>>>I am installing a Win NT 4.0 Server with a RAID-5 configuration - I am
>>>planning to install Oracle 8x Server on this machine. When
>>>configuring the RAID it asks you to submit a Striping Size (4K, 8K,
>>>16K, etc) Does anyone have any advice on the striping size which would
>>>be most efficient for Oracle.
>>>
>>>Please email at scottrp_at_localnet.com
>>>
>>>Thank You
>>
>>
>
>
Received on Mon Jul 26 1999 - 21:12:38 CDT