[lustre-discuss] Not able to start changelog in MDS

[Arnab Kumar Paul]

Hello,

I have a Lustre system with version 2.10.3 with 1 MDS and 8 OSS

On the client system: lfs df -h gives this output:

UUID                       bytes        Used   Available Use% Mounted on
scratch0-MDT0000_UUID       27.8G       61.0M       25.2G   0%
/mnt/lustre[MDT:0]
scratch0-OST0001_UUID        9.2G       37.2M        8.7G   0%
/mnt/lustre[OST:1]
scratch0-OST0002_UUID        9.2G       37.2M        8.7G   0%
/mnt/lustre[OST:2]
.
.
.

On MDS:
$* lctl set_param mdt.scratch0-MDT0000.hsm_control=enabled*
mdt.scratch0-MDT0000.hsm_control=enabled

$ *lctl --device scratch0-MDT0000 changelog_register*
scratch0-MDT0000: Registered changelog userid 'cl1'

$ *lctl get_param mdd.scratch0-MDT0000.changelog_users
mdd.scratch0-MDT0000.changelog_size*
mdd.scratch0-MDT0000.changelog_users=
current index: 1
ID    index (idle seconds)
cl1   0 (56886)
mdd.scratch0-MDT0000.changelog_size=33112

$ *lfs changelog scratch0-MDT0000*
*Can't start changelog: No such file or directory*

Why does this happen? Any suggestions how to start changelog?

- Arnab Paul
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