Listing file system attributes

Use the mmlsfs command to display the current file system attributes. Depending on your configuration, additional information that is set by GPFS™ can be displayed to help in problem determination when you contact the IBM® Support Center.

If you specify no options with the mmlsfs command, all file system attributes are listed.

For example, to list all of the attributes for the file system gpfs1, enter:

mmlsfs gpfs1

The system displays information similar to the following:

 flag                value                    description
------------------- ------------------------ -----------------------------------
 -f                 8192                     Minimum fragment (subblock) size in bytes
 -i                 4096                     Inode size in bytes
 -I                 16384                    Indirect block size in bytes
 -m                 2                        Default number of metadata replicas
 -M                 2                        Maximum number of metadata replicas
 -r                 2                        Default number of data replicas
 -R                 2                        Maximum number of data replicas
 -j                 cluster                  Block allocation type
 -D                 nfs4                     File locking semantics in effect
 -k                 all                      ACL semantics in effect
 -n                 32                       Estimated number of nodes that will mount file system
 -B                 262144                   Block size
 -Q                 user;group;fileset       Quotas accounting enabled
                    user;group;fileset       Quotas enforced
                    none                     Default quotas enabled
 --perfileset-quota No                       Per-fileset quota enforcement
 --filesetdf        No                       Fileset df enabled?
 -V                 14.20 (4.1.1.0)          File system version
 --create-time      Mon Aug 28 20:21:17 2017 File system creation time
 -z                 No                       Is DMAPI enabled?
 -L                 134217728                Logfile size
 -E                 Yes                      Exact mtime mount option
 -S                 No                       Suppress atime mount option
 -K                 whenpossible             Strict replica allocation option
 --fastea           Yes                      Fast external attributes enabled?
 --encryption       No                       Encryption enabled?
 --inode-limit      607488                   Maximum number of inodes in all inode spaces
 --log-replicas     2                        Number of log replicas
 --is4KAligned      yes                      is4KAligned?
 --rapid-repair     yes                      rapidRepair enabled?
 --write-cache-threshold 65536               HAWC Threshold (max 65536)
 --subblocks-per-full-block 32               Number of subblocks per full block
 -P                 system                   Disk storage pools in file system
--file-audit-log    No                       File Audit Logging enabled?
 -d                 nsd20;nsd21;nsd3         Disks in file system
 -A                 yes                      Automatic mount option
 -o                 none                     Additional mount options
 -T                 /gpfs1                   Default mount point
 --mount-priority   0                        Mount priority

Some of the attributes that are displayed by the mmlsfs command represent default mount options. Because the scope of mount options is an individual node, it is possible to have different values on different nodes. For exact mtime (-E option) and suppressed atime (-S option), the information that is displayed by the mmlsfs command represents the current setting on the file system manager node. If these options are changed with the mmchfs command, the change might not be reflected until the file system is remounted.

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