How can I prioritize LVM volumes I/O performance using cgroups?
I know I can use ionice to make changes at the process level but I wish to be able to do this per LV and not per process.
Asked
Active
Viewed 1,994 times
1 Answers
3
Lvm volume is a normal block device, so you can configure various process priorities on lvm volume using cgroup, for more information read this doc https://www.kernel.org/doc/Documentation/cgroups/blkio-controller.txt
example:
lvdisplay -v /dev/vg00/rootvol | grep "Block device"
echo "$MAJOR:$MINOR $((1024*250))" > /sys/fs/cgroup/blkio/blkio.throttle.write_bps_device
c4f4t0r
- 5,301
- 3
- 31
- 42
-
Is this device specific ? $major and $minor are for the specific LV I want to tune? – ApriOri Dec 23 '13 at 15:14
-
1yes, that's, you need to use the major and minor of the lvm volume – c4f4t0r Dec 23 '13 at 15:27
-
https://www.kernel.org/doc/Documentation/cgroup-v1/blkio-controller.txt – Aquarius Power Sep 01 '16 at 01:14
-
it did not work to lower the SATA vs SSD copy bottle neck (https://unix.stackexchange.com/q/306827/30352), but may be I should be using SSD vs SSD instead? in a sense that SATA vs SSD will never cope? – Aquarius Power Jul 15 '17 at 02:30
-
@AquariusPower I think that you need to check the ioscheduler, this work with cfq. – c4f4t0r Jul 17 '17 at 11:18
-
Link in answer gives a 404, this is why you should copy parts of it that is relevant. – Zulgrib Sep 03 '17 at 20:23