[LU-19704] loading changelog users during server init ends prematurely

• Type: Bug
• Resolution: Unresolved
• Priority: Minor
• Severity: 3
• Assignee: Thomas Bertschinger
• Reporter: Thomas Bertschinger

Description

When multiple changelog users are created for one MDT, it appears that only one of them is actually loaded when the server restarts. This becomes problematic if they have different masks; the actual mask applied on the server will be incomplete and changelog records can be missed.

$ lctl get_param version
version=2.17.0_RC1

$ lctl --device lustre-MDT0000 changelog_register --mask SATTR
lustre-MDT0000: Registered changelog userid 'cl1'
$ lctl --device lustre-MDT0000 changelog_register --mask OPEN
lustre-MDT0000: Registered changelog userid 'cl2'
$ lctl --device lustre-MDT0000 changelog_register --mask RENME
lustre-MDT0000: Registered changelog userid 'cl3'

$ lctl get_param mdd.lustre-MDT0000.changelog_current_mask
mdd.lustre-MDT0000.changelog_current_mask=MARK RENME OPEN SATTR

$ umount /mnt/lustre-mds1
$ mount -t lustre /dev/mapper/mds1_flakey /mnt/lustre-mds1

$ lctl get_param mdd.lustre-MDT0000.changelog_current_mask
mdd.lustre-MDT0000.changelog_current_mask=MARK RENME

Issue Links

• is related to: LU-13338 add changelog mask per registered user