Bug 1759702
| Summary: | [RFE] MDS Ephemeral Pinning | ||
|---|---|---|---|
| Product: | [Red Hat Storage] Red Hat Ceph Storage | Reporter: | Patrick Donnelly <pdonnell> |
| Component: | CephFS | Assignee: | Patrick Donnelly <pdonnell> |
| Status: | CLOSED ERRATA | QA Contact: | Amarnath <amk> |
| Severity: | low | Docs Contact: | Ranjini M N <rmandyam> |
| Priority: | high | ||
| Version: | 5.0 | CC: | ceph-eng-bugs, ceph-qe-bugs, hyelloji, rmandyam, sweil, tchandra, tserlin |
| Target Milestone: | --- | Keywords: | FutureFeature, Performance |
| Target Release: | 5.0 | ||
| Hardware: | All | ||
| OS: | All | ||
| Whiteboard: | |||
| Fixed In Version: | ceph-15.2.4-2.el8cp | Doc Type: | Enhancement |
| Doc Text: |
.Users can now use the ephemeral pinning policies for automated distribution of subtrees among MDS
With this release, the export pins are improved by introducing efficient strategies to pin subtrees, thereby enabling automated distribution of subtrees among Metadata Servers (MDS) and eliminating user intervention for manual pinning.
See the link:{cephfs-guide}#ephemeral-pinning-policies_fs[_Ephemeral pinning policies_] section in the _{storage-product} File System Guide_ for more information.
|
Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2021-08-30 08:22:57 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | |||
| Bug Blocks: | 1929729, 1959686, 2022467 | ||
|
Description
Patrick Donnelly
2019-10-08 21:09:55 UTC
In 2.8. EPHEMERAL PINNING POLICIES, Random pinning is failing when we give PERCENTAGE. setfattr -n ceph.dir.pin.random -v PERCENTAGE DIRECTORY_PATH I tried different ways [root@ceph-amar-adm-8-1619169765647-node7-client _nogroup]# setfattr -n ceph.dir.pin.distributed -v 1 /mnt/fuse_mount/volumes/_nogroup/ [root@ceph-amar-adm-8-1619169765647-node7-client _nogroup]# setfattr -n ceph.dir.pin.random -v 10 /mnt/fuse_mount/volumes/_nogroup/sub_vol_1 setfattr: /mnt/fuse_mount/volumes/_nogroup/sub_vol_1: Numerical argument out of domain [root@ceph-amar-adm-8-1619169765647-node7-client _nogroup]# setfattr -n ceph.dir.pin.random -v 0.1 /mnt/fuse_mount/volumes/_nogroup/sub_vol_1 setfattr: /mnt/fuse_mount/volumes/_nogroup/sub_vol_1: Invalid argument [root@ceph-amar-adm-8-1619169765647-node7-client _nogroup]# setfattr -n ceph.dir.pin.random -v 5 /mnt/fuse_mount/volumes/_nogroup/sub_vol_1 setfattr: /mnt/fuse_mount/volumes/_nogroup/sub_vol_1: Numerical argument out of domain [root@ceph-amar-adm-8-1619169765647-node7-client _nogroup]# setfattr -n ceph.dir.pin.random -v 1 /mnt/fuse_mount/volumes/_nogroup/sub_vol_1 setfattr: /mnt/fuse_mount/volumes/_nogroup/sub_vol_1: Invalid argument [root@ceph-amar-adm-8-1619169765647-node7-client _nogroup]# setfattr -n ceph.dir.pin.random -v 1% /mnt/fuse_mount/volumes/_nogroup/sub_vol_1 setfattr: /mnt/fuse_mount/volumes/_nogroup/sub_vol_1: Invalid argument Links Referred : Section 2.8 - https://cee-jenkins.rhev-ci-vms.eng.rdu2.redhat.com/job/CCS/job/ccs-mr-preview/34832/artifact/preview/index.html#ephemeral-pinning-policies_fs Docs have been updated Preview Link: - https://cee-jenkins.rhev-ci-vms.eng.rdu2.redhat.com/job/CCS/job/ccs-mr-preview/35209/artifact/preview/index.html#ephemeral-pinning-policies_fs Tested as per Docs and looks fine As we pin to the rank IOs are going with that rank only. tested this using ceph fs status [root@ceph-amar-adm-8-1619671138159-node1-mgr-mon-installer-client a]# setfattr -n ceph.dir.pin.distributed -v 2 /mnt/fuse_mount/volumes/_nogroup/subvol_1/ae6dd6a1-c311-4079-a7a6-cfb9f7c89e1c setfattr: /mnt/fuse_mount/volumes/_nogroup/subvol_1/ae6dd6a1-c311-4079-a7a6-cfb9f7c89e1c: Invalid argument [root@ceph-amar-adm-8-1619671138159-node1-mgr-mon-installer-client a]# setfattr -n ceph.dir.pin.distributed -v 1 /mnt/fuse_mount/volumes/_nogroup/subvol_1/ae6dd6a1-c311-4079-a7a6-cfb9f7c89e1c [root@ceph-amar-adm-8-1619671138159-node1-mgr-mon-installer-client a]# setfattr -n ceph.dir.pin.random -v 0.01 /mnt/fuse_mount/volumes/_nogroup/subvol_1/ae6dd6a1-c311-4079-a7a6-cfb9f7c89e1c [root@ceph-amar-adm-8-1619671138159-node1-mgr-mon-installer-client a]# setfattr -n ceph.dir.pin.random -v 0.02 /mnt/fuse_mount/volumes/_nogroup/subvol_1/ae6dd6a1-c311-4079-a7a6-cfb9f7c89e1c setfattr: /mnt/fuse_mount/volumes/_nogroup/subvol_1/ae6dd6a1-c311-4079-a7a6-cfb9f7c89e1c: Invalid argument [root@ceph-amar-adm-8-1619671138159-node1-mgr-mon-installer-client a]# [root@ceph-amar-adm-8-1619671138159-node1-mgr-mon-installer-client a]# setfattr -n ceph.dir.pin -v 0 /mnt/fuse_mount/volumes/_nogroup/subvol_1/ae6dd6a1-c311-4079-a7a6-cfb9f7c89e1c/a/b/ [root@ceph-amar-adm-8-1619671138159-node1-mgr-mon-installer-client a]# setfattr -n ceph.dir.pin -v 1 /mnt/fuse_mount/volumes/_nogroup/subvol_1/ae6dd6a1-c311-4079-a7a6-cfb9f7c89e1c/ 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 (Red Hat Ceph Storage 5.0 bug fix and enhancement), 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/RHBA-2021:3294 |