Lustre Quota Troubleshooting

Adding to This Guide

If you have improvements, corrections, or more information to share on this topic please contribute to this page.

Status Verification

To verify the status of space accounting and quota, run the following on every Lustre node that serves an MDT or OST and has the target mounted

lctl get_param osd-*.*.quota_slave_*.enabled 

A MDT will display two different output stanza per target: dt for data/block and md for metadata/inode.

osd-ldiskfs.testfs-MDT0000.quota_slave_dt.enabled=none
osd-ldiskfs.testfs-MDT0000.quota_slave_md.enabled=none
osd-ldiskfs.testfs-MDT0001.quota_slave_dt.enabled=none
osd-ldiskfs.testfs-MDT0001.quota_slave_md.enabled=none

An OST will display only one output stanza per target: dt for data/block.

osd-ldiskfs.testfs-OST0000.quota_slave_dt.enabled=none
osd-ldiskfs.testfs-OST0001.quota_slave_dt.enabled=none

Closely inspect the values for quota enabled: and space acct:. The values can be none or any combination of the letters u, g and p, representing user, group and project. The default value for quota enabled: is none and the default value for space acct: is ugp

Quota Modification

User, group and project quota can be modified on a per target basis. Typically, it is desirable to have all target's quota configuration set the same.