Evicting files or objects metadata

Complete the following steps to evict metadata from files or objects:

1. To check a fileset, issue the following command:

   mmlsfileset fs1 afmtocos1 -i

   A sample output is as follows:

   Filesets in file system 'fs1':
   Name      Status Path                InodeSpace MaxInodes AllocInodes UsedInodes
   afmtocos1 Linked /gpfs/fs1/afmtocos1 1          100352    100352      13

   Note: The used inodes are 13. You need to evict 5 objects metadata.
2. To check the list of files in an evict file, issue the following command:

   cat /root/evictfile

   A sample output is as follows:

   /gpfs/fs1/afmtocos1/osbject1
   /gpfs/fs1/afmtocos1/osbject2
   /gpfs/fs1/afmtocos1/osbject3
   /gpfs/fs1/afmtocos1/osbject4
   /gpfs/fs1/afmtocos1/osbject5

3. To evict the metadata, issue the following command:

   mmafmcosctl fs1 afmtocos1 /gpfs/fs1/afmtocos1/ evict --object-list /root/evictfile --metadata

4. To check the fileset again, issue the following command:

   mmlsfileset fs1 afmtocos1-i

   A sample output is as follows:

   Filesets in file system 'fs1':
   Name      Status Path                InodeSpace MaxInodes AllocInodes UsedInodes
   afmtocos1 Linked /gpfs/fs1/afmtocos1 1          100352    100352      8

   Metadata is evicted and the inodes are reduced to 8.
5. Populate the metadata after any metadata read operation is performed.
   1. To get the contents of the fileset, issue the following command:

      ls -l /gpfs/fs1/afmtocos1/

      A sample output is as follows:

      total 10240
      -rwx------ 1 root root 2097152 Sep 10 2020 osbject1
      -rw-r--r-- 1 root root 2097152 Sep 10 2020 osbject10
      -rwx------ 1 root root 2097152 Sep 10 2020 osbject2
      -rwx------ 1 root root 2097152 Sep 10 2020 osbject3
      -rwx------ 1 root root 2097152 Sep 10 2020 osbject4
      -rwx------ 1 root root 2097152 Sep 10 2020 osbject5
      -rw-r--r-- 1 root root 2097152 Sep 10 2020 osbject6
      -rw-r--r-- 1 root root 2097152 Sep 10 2020 osbject7
      -rw-r--r-- 1 root root 2097152 Sep 10 2020 osbject8
      -rw-r--r-- 1 root root 2097152 Sep 10 2020 osbject9

   2. To check the fileset usage, issue the following command:

      mmlsfileset fs1 afmtocos1 -i

      A sample output is as follows:

      Filesets in file system 'fs1':
      Name      Status Path                InodeSpace MaxInodes AllocInodes UsedInodes
      afmtocos1 Linked /gpfs/fs1/afmtocos1 1          100352    100352       13

      Now the used inodes are 13 because all evicted metadata is brought back to the cloud object storage.