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  1. Lustre
  2. LU-19219

Change in ("fstrim -v") with EXT4_BG_TRIMMED

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    • 9223372036854775807

      With Lustre version 2.15.4.1_cray_12_gc624701-46 successive fstrim commands act only on blocks that have been deleted since the last trim:

      [root@kjlmo1n02 ~]# fstrim -v /data/kjlmo1n03:md65
/data/kjlmo1n03:md65: 5.5 TiB (6101931544576 bytes) trimmed
[root@kjlmo1n02 ~]# fstrim -v /data/kjlmo1n03:md65
/data/kjlmo1n03:md65: 0 B (0 bytes) trimmed
[root@kjlmo1n02 ~]#

      In Lustre 2.15.4.2_cray_237_g3b03a62-243, however, this behavior has changed so that all blocks are trimmed every time:

      [root@e2kd1n002 ~]# fstrim -v /data/e2kd1n003:md65
/data/e2kd1n003:md65: 22.1 TiB (24245231648768 bytes) trimmed
[root@e2kd1n002 ~]# fstrim -v /data/e2kd1n003:md65
/data/e2kd1n003:md65: 22.1 TiB (24245231648768 bytes) trimmed
[root@e2kd1n002 ~]#

            stancheff Shaun Tancheff
            stancheff Shaun Tancheff
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              Created:
              Updated: