Modifying file system attributes

Use the mmchfs command to modify existing file system attributes.

Note: All files created after issuing the mmchfs command take on the new attributes. Existing files are not affected. Use the mmchattr or mmrestripefs -R command to change the replication factor of existing files. See Querying and changing file replication attributes.

For example, to change the default data replication factor to 2 for the file system fs1, enter:

mmchfs fs1 -r 2

To confirm the changes, enter:

mmlsfs fs1 -r

The system displays information similar to:

flag                value                    description
------------------- ------------------------ -----------------------------------
 -r                 2                        Default number of data replicas

For complete usage information, see mmchfs command and mmlsfs command. For a detailed discussion of file system attributes, see GPFS architecture and File system creation considerations.