[lustre-discuss] Question regarding of lfs df values
Scott Wood
woodystrash at hotmail.com
Sat Aug 3 14:55:23 PDT 2019
Hi folks,
We're in the process of draining and replacing all of our OSTs. After "lfs find /mnt/lustre/ -obd bigvol-OST0020 | ./lfs_migrate -y 2>&1" completes, I do a final check to see if anything is in that OST with "lfs find /mnt/lustre/ -obd bigvol-OST0020" and it comes back with nothing so I expect the OST to be empty. However an "lfs df" shows it still has over 300GB on it:
[root at hpcpbs01 lfs_migrate]# lfs df
UUID bytes Used Available Use% Mounted on
...
bigvol-OST0020_UUID 30997543948 345261920 29089667964 1% /mnt/lustre[OST:32]
...
filesystem_summary: 3345012413904 1976188607492 1200167543136 62% /mnt/lustre
Also, looking at the filesystem_summary, if I subtract the "Used" from "1K-blocks", the number is much higher than "Available", to the tune of 157TB.
Are either of these findings easily explained?
Regards
Scott
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