RE: Performance Issue with multiple dataserver

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Hi,

I am using on Server linux-pnfs-2.6.38(linux-pnfs-ae7441f.tar) and on client also linux-pnfs-2.6.38(linux-pnfs-ae7441f.tar) downloaded from http://git.linux-nfs.org/?p=bhalevy/linux-pnfs.git;a=summary on Fedora 14.

Extremely sorry for causing confusing .
-----Original Message-----
From: J. Bruce Fields [mailto:bfields@xxxxxxxxxxxx] 
Sent: Wednesday, May 18, 2011 9:43 PM
To: Ansari, Taousif - Dell Team
Cc: linux-nfs@xxxxxxxxxxxxxxx
Subject: Re: Performance Issue with multiple dataserver

You sent this message as a reply to an unrelated message, which is
confusing to those of us with threaded mail readers.

On Wed, May 18, 2011 at 05:24:45PM +0530, Taousif_Ansari@xxxxxxxxxxxx wrote:
> I have done pNFS setup with single Dataserver and Two Dataserver and ran the IOzone tool on both, I found that the performance with multiple dataservers is less than the performance with single dataservers.

What are you using as the server, and what as the client?

--b.

> 
> Here are some numbers, which were captured by the IOzone tool.
> 
> 
> 							  4	  8	 16	 32	 64	 128	 256	 512	1024	<== Record Length in KB
> With Single Dataserver:
> Read operation for file size 1 MB-		66415	66359	63630	70358	86223	70256	66047	66068	68489	<== IO kB/sec
> Write operation for file size 1 MB-		18827	16920	18846	17039	18896	17009	17173	19206	17947	<== IO kB/sec
> 
> With Two Dataservers :
> Read operation for file size 1 MB-		36882	381198	38150	38084	38749	33663	34398	37313	37847	<== IO kB/sec
> Write operation for file size 1 MB-		5461	4661	5586	4870	5227	4922	4214	5572	4658	<== IO kB/sec
> 
> 
> Can somebody tell me What could be the issue....
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