did u increase the stripe cache size ? On 1/18/07, Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx> wrote:
Sevrin Robstad wrote: > I'm suffering from bad performance on my RAID5. > > a "echo check >/sys/block/md0/md/sync_action" > > gives a speed at only about 5000K/sec , and HIGH load average : > > # uptime > 20:03:55 up 8 days, 19:55, 1 user, load average: 11.70, 4.04, 1.52 > > kernel is 2.6.18.1.2257.fc5 > mdadm is v2.5.5 > > the system consist of an athlon XP1,2GHz and two Sil3114 4port S-ATA > PCI cards with a total of 6 250gb S-ATA drives connected. > > [root@compaq ~]# mdadm --detail /dev/md0 > /dev/md0: > Version : 00.90.03 > Creation Time : Tue Dec 5 00:33:01 2006 > Raid Level : raid5 > Array Size : 1218931200 (1162.46 GiB 1248.19 GB) > Device Size : 243786240 (232.49 GiB 249.64 GB) > Raid Devices : 6 > Total Devices : 6 > Preferred Minor : 0 > Persistence : Superblock is persistent > > Update Time : Wed Jan 17 23:14:39 2007 > State : clean > Active Devices : 6 > Working Devices : 6 > Failed Devices : 0 > Spare Devices : 0 > > Layout : left-symmetric > Chunk Size : 256K > > UUID : 27dce477:6f45d11b:77377d08:732fa0e6 > Events : 0.58 > > Number Major Minor RaidDevice State > 0 8 1 0 active sync /dev/sda1 > 1 8 17 1 active sync /dev/sdb1 > 2 8 33 2 active sync /dev/sdc1 > 3 8 49 3 active sync /dev/sdd1 > 4 8 65 4 active sync /dev/sde1 > 5 8 81 5 active sync /dev/sdf1 > [root@compaq ~]# > > > Sevrin > - > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html If they are on the PCI bus, that is about right, you probably should be getting 10-15MB/s, but it is about right. If you had each drive on its own PCI-e controller, then you would get much faster speeds. - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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