- 1. raid 10 su, sw settings (score: 1)
- Author: Brad Langhorst <brad@xxxxxxxxxxxxx>
- Date: Sun, 30 Dec 2007 19:00:39 -0500
- I have this system - 3ware 9650 controller - 4 disk raid 10 - 64k stripe size - this is a vmware host, so lots of r/w on a few big files. I'm not entirely satisfied with its performance. Typical bloc
- /archives/xfs/2007-12/msg00221.html (8,675 bytes)
- 2. Re: raid 10 su, sw settings (score: 1)
- Author: Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx>
- Date: Mon, 31 Dec 2007 12:04:17 -0500 (EST)
- On Sun, 30 Dec 2007, Brad Langhorst wrote: I have this system - 3ware 9650 controller - 4 disk raid 10 - 64k stripe size - this is a vmware host, so lots of r/w on a few big files. I'm not entirely s
- /archives/xfs/2007-12/msg00222.html (10,248 bytes)
- 3. Re: raid 10 su, sw settings (score: 1)
- Author: Brad Langhorst <brad@xxxxxxxxxxxxx>
- Date: Mon, 31 Dec 2007 13:43:06 -0500
- Are you saying that i should not expect more? I expect about 70% better performance, since I think a single disk should be able to do 100M/s. Maybe this is unreasonable? I am able to do the remount,
- /archives/xfs/2007-12/msg00224.html (8,768 bytes)
- 4. Re: raid 10 su, sw settings (score: 1)
- Author: Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx>
- Date: Mon, 31 Dec 2007 14:07:27 -0500 (EST)
- Are you saying that i should not expect more? I expect about 70% better performance, since I think a single disk should be able to do 100M/s. Maybe this is unreasonable? A single disk may do 90MiB/s
- /archives/xfs/2007-12/msg00225.html (10,210 bytes)
- 5. Re: raid 10 su, sw settings (score: 1)
- Author: Iustin Pop <iusty@xxxxxxxxx>
- Date: Mon, 31 Dec 2007 21:17:12 +0100
- I agree about the disk speed - 100MiB/s for SATA drives is a little bit too much to expect. And certainly, *only* in purely single-reader or single-writer sequential workloads. I have the same config
- /archives/xfs/2007-12/msg00227.html (10,354 bytes)
- 6. Re: raid 10 su, sw settings (score: 1)
- Author: Brad Langhorst <brad@xxxxxxxxxxxxx>
- Date: Mon, 31 Dec 2007 15:55:01 -0500
- I guess I should re-adjust my expectations Any opinions on the partition layout? Did you go to special effort to layout your partitions on the stripe boundaries (actually i don't really understand th
- /archives/xfs/2007-12/msg00228.html (10,208 bytes)
- 7. Re: raid 10 su, sw settings (score: 1)
- Author: Iustin Pop <iusty@xxxxxxxxx>
- Date: Mon, 31 Dec 2007 22:42:23 +0100
- So instead of the usual 255 heads, 63 cylinders fake geometry that is not a multiple of anything, I setup 16h/16c geometry that gives a nice power-of-two multiplier so all partitions *should* be alig
- /archives/xfs/2007-12/msg00229.html (9,485 bytes)
- 8. Re: raid 10 su, sw settings (score: 1)
- Author: Brad Langhorst <brad@xxxxxxxxxxxxx>
- Date: Mon, 31 Dec 2007 17:54:04 -0500
- Sorry to be thick... i don't understand this. Do you configure the raid controller with these settings? or is this an fdisk option? thanks! brad
- /archives/xfs/2007-12/msg00230.html (9,148 bytes)
- 9. Re: raid 10 su, sw settings (score: 1)
- Author: Iustin Pop <iusty@xxxxxxxxx>
- Date: Tue, 1 Jan 2008 01:15:04 +0100
- Note: I'm not even sure it matters, or if I did it right :) It's an fdisk option. For example, "fdisk -H 16 -S 16 /dev/sdX". Also, happy new year! iustin
- /archives/xfs/2007-12/msg00231.html (9,881 bytes)
- 10. raid 10 su, sw settings (score: 1)
- Author: Brad Langhorst <brad@xxxxxxxxxxxxx>
- Date: Sun, 30 Dec 2007 19:00:39 -0500
- I have this system - 3ware 9650 controller - 4 disk raid 10 - 64k stripe size - this is a vmware host, so lots of r/w on a few big files. I'm not entirely satisfied with its performance. Typical bloc
- /archives/xfs/2007-12/msg00453.html (8,675 bytes)
- 11. Re: raid 10 su, sw settings (score: 1)
- Author: Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx>
- Date: Mon, 31 Dec 2007 12:04:17 -0500 (EST)
- On Sun, 30 Dec 2007, Brad Langhorst wrote: I have this system - 3ware 9650 controller - 4 disk raid 10 - 64k stripe size - this is a vmware host, so lots of r/w on a few big files. I'm not entirely s
- /archives/xfs/2007-12/msg00454.html (10,248 bytes)
- 12. Re: raid 10 su, sw settings (score: 1)
- Author: Brad Langhorst <brad@xxxxxxxxxxxxx>
- Date: Mon, 31 Dec 2007 13:43:06 -0500
- Are you saying that i should not expect more? I expect about 70% better performance, since I think a single disk should be able to do 100M/s. Maybe this is unreasonable? I am able to do the remount,
- /archives/xfs/2007-12/msg00456.html (8,768 bytes)
- 13. Re: raid 10 su, sw settings (score: 1)
- Author: Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx>
- Date: Mon, 31 Dec 2007 14:07:27 -0500 (EST)
- Are you saying that i should not expect more? I expect about 70% better performance, since I think a single disk should be able to do 100M/s. Maybe this is unreasonable? A single disk may do 90MiB/s
- /archives/xfs/2007-12/msg00457.html (10,210 bytes)
- 14. Re: raid 10 su, sw settings (score: 1)
- Author: Iustin Pop <iusty@xxxxxxxxx>
- Date: Mon, 31 Dec 2007 21:17:12 +0100
- I agree about the disk speed - 100MiB/s for SATA drives is a little bit too much to expect. And certainly, *only* in purely single-reader or single-writer sequential workloads. I have the same config
- /archives/xfs/2007-12/msg00459.html (10,354 bytes)
- 15. Re: raid 10 su, sw settings (score: 1)
- Author: Brad Langhorst <brad@xxxxxxxxxxxxx>
- Date: Mon, 31 Dec 2007 15:55:01 -0500
- I guess I should re-adjust my expectations Any opinions on the partition layout? Did you go to special effort to layout your partitions on the stripe boundaries (actually i don't really understand th
- /archives/xfs/2007-12/msg00460.html (10,208 bytes)
- 16. Re: raid 10 su, sw settings (score: 1)
- Author: Iustin Pop <iusty@xxxxxxxxx>
- Date: Mon, 31 Dec 2007 22:42:23 +0100
- So instead of the usual 255 heads, 63 cylinders fake geometry that is not a multiple of anything, I setup 16h/16c geometry that gives a nice power-of-two multiplier so all partitions *should* be alig
- /archives/xfs/2007-12/msg00461.html (9,485 bytes)
- 17. Re: raid 10 su, sw settings (score: 1)
- Author: Brad Langhorst <brad@xxxxxxxxxxxxx>
- Date: Mon, 31 Dec 2007 17:54:04 -0500
- Sorry to be thick... i don't understand this. Do you configure the raid controller with these settings? or is this an fdisk option? thanks! brad
- /archives/xfs/2007-12/msg00462.html (9,148 bytes)
- 18. Re: raid 10 su, sw settings (score: 1)
- Author: Iustin Pop <iusty@xxxxxxxxx>
- Date: Tue, 1 Jan 2008 01:15:04 +0100
- Note: I'm not even sure it matters, or if I did it right :) It's an fdisk option. For example, "fdisk -H 16 -S 16 /dev/sdX". Also, happy new year! iustin
- /archives/xfs/2007-12/msg00463.html (9,881 bytes)
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