Red Hat Bugzilla – Bug 1523562
[RFE] Change xfs settings when vdo volume is used
Last modified: 2018-06-20 23:34:49 EDT
Description of problem: According to Dennis Keefe, Use these xfs settings for XFS in RHHI, so that XFS handle conditions when VDO runs out of physical space. echo 4 | tee /sys/fs/xfs/dm-13/error/metadata/ENOSPC/max_retries echo 4 | tee /sys/fs/xfs/dm-13/error/metadata/EIO/max_retries Version-Release number of selected component (if applicable):
gdeploy should first find which are all the brick devices in terms of 'dm' id, then comment0 should help
Deployment using vdo option fails in RHHI. [vdo] action=create devices=sdd names=vdo_sdd logicalsize=10000G blockmapcachesize=128M readcache=enabled readcachesize=20M emulate512=enabled writepolicy=sync ignore_vdo_errors=no slabsize=32G TASK [set xfs ENOSPC metadata settings during vdo creation] ******************** fatal: [10.70.37.28]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'item' is undefined\n\nThe error appears to have been in '/tmp/tmpwzRfaZ/vdo-create.yml': line 31, column 9, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n - name: set xfs ENOSPC metadata settings during vdo creation\n ^ here\n\nexception type: <class 'ansible.errors.AnsibleUndefinedVariable'>\nexception: 'item' is undefined"} to retry, use: --limit @/tmp/tmpwzRfaZ/vdo-create.retry
Hi Dennis, Setting this option via "echo 4 | tee /sys/fs/xfs/dm-13/error/metadata/ENOSPC/max_retries" does not persist on remounting the device. Is there a way to persist this across node reboot?
Hi Sahina, Unfortunately, the "max_retries" setting resets to the default value of "-1" after unmounting and remounting the filesystem. One potential solution would be a script to set the "max_retries" of the XFS filesystem on the VDO volume after it is successfully mounted.
This PR[1] fixes the issue. [1] https://github.com/gluster/gdeploy/pull/505 Thanks.
Tested with gdeploy-2.0.2-26.el7rhgs The max_retries of the XFS were set to 4 [root@localhost]# cat /sys/fs/xfs/dm-13/error/metadata/ENOSPC/max_retries 4 [root@localhost]# cat /sys/fs/xfs/dm-13/error/metadata/ENOSPC/max_retries 4
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHEA-2018:1958