From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marek Fstump Subject: Re: very poor read / write performance compared to other FS's? Date: Fri, 13 May 2011 00:15:07 +0100 Message-ID: References: <20110512153901.GA19041@dhcp231-156.rdu.redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Cc: linux-btrfs@vger.kernel.org To: Josef Bacik Return-path: In-Reply-To: <20110512153901.GA19041@dhcp231-156.rdu.redhat.com> List-ID: On Thu, May 12, 2011 at 4:39 PM, Josef Bacik wrote: > On Wed, May 11, 2011 at 11:33:35PM +0100, Marek Fstump wrote: >> Hi >> >> I am very interested in using BTRFS for my solution but in basic tes= ts >> it seems to be very poor on read and write performance. =A0I am >> surprised by this so suspect that maybe I am doing something >> incorrectly or that there are updates I should be using, but I am no= t >> sure how I update BTRFS on SLES11 >> >> Summary: >> RESULTS on link below >> SLES11 SP1 >> Compared Sequential read/write performance against XFS and OCFS2 >> Backend storage =96 FusionIO SLC SSD =3D circa 750MBsec >> >> Tests =A0set as follows: >> Filesystem contains 30 x 4GB files (made of random data) >> Read tests will read from 1 to 30 files concurrently >> Write tests will write 1 to 30 concurrent NEW files (simple 000=92s) >> dd -direct flag used on writes >> >> All defaults used for mounting etc. >> >> Results shown in attachment. >> >> BTRFS looks an excellent FS and perfect for my application and I am >> hoping that there are some factors that I am missing >> and would appreciate any advice / help >> > > Yeah our O_DIRECT performance is less than stellar, I just did a bunc= h of work > to try and help us get a little better performance. =A0Would you mind= pulling > down linus's git tree and testing on that and seeing if you get bette= r > performance? =A0Thanks, > > Josef > Hi Josef =46orgive me as i am a 'storage guy' - so when you say pull down linus'= s git tree and test.... do you mean grab the latest kernel? i know very stupid question, but just want to make sure i get it right... if so, then yes i will and i will add some more storage power also to see if it scales. THank you -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" = in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html