Bug 1842199 - [RFE] asynchronous create/unlink metadata operations in CephFS
Summary: [RFE] asynchronous create/unlink metadata operations in CephFS
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Ceph Storage
Classification: Red Hat Storage
Component: CephFS
Version: 5.0
Hardware: All
OS: Linux
medium
low
Target Milestone: ---
: 5.0
Assignee: Jeff Layton
QA Contact: Hemanth Kumar
Ranjini M N
URL:
Whiteboard:
Depends On: 1932753
Blocks: 1959686
TreeView+ depends on / blocked
 
Reported: 2020-05-30 23:38 UTC by Patrick Donnelly
Modified: 2021-08-30 08:25 UTC (History)
7 users (show)

Fixed In Version:
Doc Type: Enhancement
Doc Text:
.Asynchronous creation and removal of metadata operations in the Ceph File System With this release, {os-product} 8.4 kernel mounts now asynchronously execute file creation and removal on {storage-product} clusters. This improves performance of some workloads by avoiding round-trip latency for these system calls without impacting consistency. Use the new `-o nowsync` mount option to enable asynchronous file creation and deletion.
Clone Of:
Environment:
Last Closed: 2021-08-30 08:25:30 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Ceph Project Bug Tracker 38951 0 None None None 2020-05-30 23:38:33 UTC
Red Hat Issue Tracker RHCEPH-1239 0 None None None 2021-08-30 00:18:51 UTC
Red Hat Product Errata RHBA-2021:3294 0 None None None 2021-08-30 08:25:45 UTC

Description Patrick Donnelly 2020-05-30 23:38:33 UTC 
New functionality in the kernel (RHEL8) and MDS allows for doing some metadata operations asynchronously. More information here:

https://tracker.ceph.com/issues/38951

and the new "nowsync" mount option:

https://docs.ceph.com/docs/master/man/8/mount.ceph/#advanced

This is a test-only BZ.
Comment 2 Ken Dreyer (Red Hat) 2020-07-22 16:59:07 UTC 
Jeff confirmed that all the userland parts of this already upstream in 15.2.4, which we're already building, so this is TestOnly at this point.
Comment 4 Jeff Layton 2021-02-09 17:59:46 UTC 
Take heed that this will need to be tested using RHEL-8.3.0 or later kernels. To use this, you'll need to mount with "-o nowsync".
Comment 5 Andrej Filipcic 2021-03-12 09:20:07 UTC 
Was this already tested on RHEL8.3 4.18.0-240.el8.x86_64 kernel? I have tried it and it freezes the system.
Comment 17 errata-xmlrpc 2021-08-30 08:25:30 UTC 
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
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