Hi,
Op 3-4-2012 10:02, Andrey Korolyov schreef:
Hi,
# virsh blkdeviotune Test vdb --write_iops_sec 50 //file block device
# virsh blkdeviotune Test vda --write_iops_sec 50 //rbd block device
error: Unable to change block I/O throttle
error: invalid argument: No device found for specified path
That is correct. As far as I know iotune uses the underlying cgroups
from the OS.
RBD devices (when using Qemu) are not block devices which can be managed
by cgroups. That's why it's not working and you get the error that the
device can't be found.
There is however somebody working on DiskIoThrottling inside Qemu:
http://wiki.qemu.org/Features/DiskIOLimits
That would work with RBD (he even names Ceph :) )
Wido
2012-04-03 07:38:49.170+0000: 30171: debug :
virDomainSetBlockIoTune:18317 : dom=0x1114590, (VM: name=Test,
uuid=8c27bf32-82dc-315a-d0ba-4653b1b3d595), disk=vda,
params=0x1114600, nparams=1, flags=0
2012-04-03 07:38:49.170+0000: 30169: debug :
virEventPollMakePollFDs:383 : Prepare n=8 w=11, f=16 e=1 d=0
2012-04-03 07:38:49.170+0000: 30169: debug :
virEventPollCalculateTimeout:325 : Calculate expiry of 4 timers
2012-04-03 07:38:49.170+0000: 30169: debug :
virEventPollCalculateTimeout:331 : Got a timeout scheduled for
1333438734170
2012-04-03 07:38:49.170+0000: 30171: error : qemuDiskPathToAlias:11338
: invalid argument: No device found for specified path
2012-04-03 07:38:49.170+0000: 30171: debug : virDomainFree:2313 :
dom=0x1114590, (VM: name=Test,
uuid=8c27bf32-82dc-315a-d0ba-4653b1b3d595)
2012-04-03 07:38:49.170+0000: 30171: debug : virUnrefDomain:276 :
unref domain 0x1114590 Test 1
2012-04-03 07:38:49.170+0000: 30171: debug : virReleaseDomain:238 :
release domain 0x1114590 Test 8c27bf32-82dc-315a-d0ba-4653b1b3d595
2012-04-03 07:38:49.170+0000: 30169: debug :
virEventPollCalculateTimeout:351 : Timeout at 1333438734170 due in
5000 ms
2012-04-03 07:38:49.170+0000: 30169: debug : virEventPollRunOnce:619 :
EVENT_POLL_RUN: nhandles=9 imeout=5000
2012-04-03 07:38:49.170+0000: 30171: debug : virReleaseDomain:246 :
unref connection 0x1177b10 2
libvir 0.9.10, json-escape patch applied, but seems that this problem
related to another incorrect path handle.
I`m in doubt if it belongs to libvirt ml or here.
--
To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
--
To unsubscribe from this list: send the line "unsubscribe ceph-devel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
