- Original Message -
From: Raz Ben-Jehuda(caro) [EMAIL PROTECTED]
To: JaniD++ [EMAIL PROTECTED]
Cc: Linux RAID Mailing List linux-raid@vger.kernel.org
Sent: Tuesday, January 10, 2006 12:25 AM
Subject: Re: raid5 read performance
1. it is not good to use so many disks in one raid
- Original Message -
From: Raz Ben-Jehuda(caro) [EMAIL PROTECTED]
To: JaniD++ [EMAIL PROTECTED]
Cc: linux-raid@vger.kernel.org
Sent: Tuesday, January 10, 2006 9:05 PM
Subject: Re: raid5 read performance
NBD for network block device ?
Yes. :-)
why do u use it ?
I need only one big
, JaniD++ [EMAIL PROTECTED] wrote:
- Original Message -
From: Raz Ben-Jehuda(caro) [EMAIL PROTECTED]
To: JaniD++ [EMAIL PROTECTED]
Cc: Linux RAID Mailing List linux-raid@vger.kernel.org
Sent: Wednesday, January 04, 2006 2:49 PM
Subject: Re: raid5 read performance
1. do you want
I guess i was not clear enough.
i am using raid5 over 3 maxtor disks. the chunk size is 1MB.
i mesured the io coming from one disk alone when I READ
from it with 1MB buffers , and i know that it is ~32MB/s.
I created raid0 over two disks and my throughput grown to
64 MB/s.
Doing the same thing
-
From: Raz Ben-Jehuda(caro) [EMAIL PROTECTED]
To: Mark Hahn [EMAIL PROTECTED]
Cc: Linux RAID Mailing List linux-raid@vger.kernel.org
Sent: Wednesday, January 04, 2006 9:14 AM
Subject: Re: raid5 read performance
I guess i was not clear enough.
i am using raid5 over 3 maxtor disks. the chunk
I am checking raid5 performance.
I am using asynchronous ios with buffer size as the stripe size.
In this case i am using a stripe size of 1M with 2+1 disks.
Unlike raid0 , raid5 drops the performance by 50% .
Why ?
Is it because it does parity checkings ?
thank you
--
Raz
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