Hi all,
We have a setup which is using thinly provisioned Logical volume. When we try to create or delete the snapshot
we are experiencing I/O hang to this logical volume, which has XFS filesystem on it. Also system got stuck at
VG deactivation during reboot.
Following is the setup details:
* The thin pool size is 3.09TB, and the problematic thinlv(rian21_projects_media2) size is 2.57TB.
* This issue started appearing after the snapshot number reached 8 , data% of the thinlv became 90%
* The PV is made from a LUN of size 3.66TB which is coming from "IBM XIV Storage System"
* We observed that it is taking around 10 mins to de-activate the LV while shutting down the node and around 10 mins to activate this LV when the machine is booting up. Is this a normal behavior?
* The lvm & dmsetup command outputs are attached .
we are experiencing I/O hang to this logical volume, which has XFS filesystem on it. Also system got stuck at
VG deactivation during reboot.
Following is the setup details:
* The thin pool size is 3.09TB, and the problematic thinlv(rian21_projects_media2) size is 2.57TB.
* This issue started appearing after the snapshot number reached 8 , data% of the thinlv became 90%
* The PV is made from a LUN of size 3.66TB which is coming from "IBM XIV Storage System"
* We observed that it is taking around 10 mins to de-activate the LV while shutting down the node and around 10 mins to activate this LV when the machine is booting up. Is this a normal behavior?
* The lvm & dmsetup command outputs are attached .
* No storage related errors seen in /var/log/messages.
Is there any known issues with the LVM , that can lead to i/o hang during creation or deletion of snapshot. ?
LVM package version and kernel version are below.
lvm2-2.02.118-3.el6_7.4.x86_64
2.6.32-573.12.1.el6.x86_64
xfsprogs-3.1.1-16.el6.x86_64
lvm2-2.02.118-3.el6_7.4.x86_64
2.6.32-573.12.1.el6.x86_64
xfsprogs-3.1.1-16.el6.x86_64
It would be really helpful if you can give pointers to diagnose this issue.
Thanks & Regards,
Rajesh
Attachment:
lvminfo.tar
Description: Unix tar archive
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