From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from fieldses.org ([174.143.236.118]:44755 "EHLO fieldses.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757259Ab1ERQMk (ORCPT ); Wed, 18 May 2011 12:12:40 -0400 Date: Wed, 18 May 2011 12:12:39 -0400 To: Taousif_Ansari@DELLTEAM.com Cc: linux-nfs@vger.kernel.org Subject: Re: Performance Issue with multiple dataserver Message-ID: <20110518161239.GA16835@fieldses.org> References: <4DD2A084.1040905@moving-picture.com> <20110518080106.1159c5b8@notabene.brown> <4DD39D39.7010805@moving-picture.com> Content-Type: text/plain; charset=us-ascii In-Reply-To: From: "J. Bruce Fields" Sender: linux-nfs-owner@vger.kernel.org List-ID: MIME-Version: 1.0 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@DELLTEAM.com 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.... > -- > To unsubscribe from this list: send the line "unsubscribe linux-nfs" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html