From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marek Fstump Subject: very poor read / write performance compared to other FS's? Date: Wed, 11 May 2011 23:33:35 +0100 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 To: linux-btrfs@vger.kernel.org Return-path: List-ID: 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 =96 FusionIO SLC SSD =3D circa 750MBsec Tests set as follows: =46ilesystem 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 Graph is here (Thank you =91cwillu=92) http://cwillu.com/files/btrfs/read-write_perf.pdf Marek -- 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