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Re: nfs/local performance with software raid5 and xfs and SMP

To: Tru Huynh <tru@xxxxxxxxxx>, "linux-xfs@xxxxxxxxxxx" <linux-xfs@xxxxxxxxxxx>
Subject: Re: nfs/local performance with software raid5 and xfs and SMP
From: Seth Mos <knuffie@xxxxxxxxx>
Date: Thu, 19 Jul 2001 11:21:08 +0200
In-reply-to: <3B56A07D.FDA92943@xxxxxxxxxx>
References: <3B55E49E.5B4B6CEF@xxxxxxxxxx>
Sender: owner-linux-xfs@xxxxxxxxxxx
At 10:55 19-7-2001 +0200, Tru Huynh wrote:
1) 3ware driver 3w-xxxx is not(?) SMP aware?
- current firmware
- current 3w-xxxx drivers:
  2.4.3-xfs-1.0.1
  2.4.5-xfs-1.0.1
  I guess the SMP kernel come with SMP aware driver :)

Maybe the people over at linux-ide.org have a newer 3ware driver.

2) 3com cards not working properly (3c59x driver)
  packet losts, bonnie on nfs (too many interrupts?)

- not errors reported on either cards and switch
(no collisions, dropped. overruns/carriers on

That's good.

- ok for bonnie, will post the results ASAP.
  Do I need to run all 4 combinations UP/SMP 2.4.3/2.4.5?

Mainly the SMP ones. and one UP. Performance between UP kernels will probably be similar.

3) testing kernel >= 2.4.7pre5
- will do after getting today's cvs update

It's 2.4.7-pre8 at the moment.

4) try SMP+raid5 on local IDE HD to rule out 3ware issue
- I just have a single HD on the primary IDE controller
  I can only repartion it by destroying the scratch partition.
  Will 3 logical partitions be ok for a minimal raid5 device?

Yes that will do

5) change the chunk-size from 64 to 256/512.
- I guess that is fine tuning :)

Should be faster with large files.

Cheers

--
Seth
Every program has two purposes one for which
it was written and another for which it wasn't
I use the last kind.


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