On Tue, Apr 16, 2013 at 11:55 PM, Sander <san...@humilis.net> wrote: > Matt Pursley wrote (ao): >> I have an LSI HBA card (LSI SAS 9207-8i) with 12 7200rpm SAS drives >> attached. When it's formated with mdraid6+ext4 I get about 1200MB/s >> for multiple streaming random reads with iozone. With btrfs in >> 3.9.0-rc4 I can also get about 1200MB/s, but only with one stream at a >> time. > > Just curious, is that btrfs on top of mdraid6, or is this experimental > btrfs raid6 without md?
This is the "experimental btrfs raid6 without md". But, I did do a "mdraid6 with btrfs" test last night... and with that setup I only get the ~750MB/s result.. even with just one thread/stream... I will flip the system back to "btrfsraid6+btrfs" today to verify that I still get the full 1200MB/s with one stream/thread and ~750MB/s with two or more streams/threads with that setup... Thanks, Matt ___ mdraid6+btrfs_64GBRam_80files # sysctl vm.drop_caches=1 ; dd of=/dev/null if=/var/data/persist/testfile bs=640k vm.drop_caches = 1 20000+0 records in 20000+0 records out 13107200000 bytes (13 GB) copied, 18.2109 s, 720 MB/s ___ -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
