On 13 May 2011 07:15, Marek Fstump <marekfstump@xxxxxxxxx> wrote: > On Thu, May 12, 2011 at 4:39 PM, Josef Bacik <josef@xxxxxxxxxx> 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 tests >>> it seems to be very poor on read and write performance. I 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 not >>> 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 – FusionIO SLC SSD = circa 750MBsec >>> >>> Tests set 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’s) >>> 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 bunch of work >> to try and help us get a little better performance. Would you mind pulling >> down linus's git tree and testing on that and seeing if you get better >> performance? Thanks, >> >> Josef >> > > Hi Josef > > Forgive 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. For SLES 11, the kernel RPMs here may be your best shot: http://download.opensuse.org/repositories/Kernel:/stable/standard/x86_64/ (eg kernel-default-2.6.38.6-1.1.x86_64.rpm) You'll probably have to download dependent RPMs from there too. Thanks, Daniel -- Daniel J Blueman -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
