mmlspool command

Displays information about the known storage pools.

Synopsis

mmlspool Device {StoragePool[,StoragePool...] | all} [-L]

Availability

Available on all IBM Spectrum Scale editions.

Description

The mmlspool command displays basic or detailed information about the storage pools in a file system.

Parameters

Device: Specifies the device name of the file system for which storage pool information is to be displayed. File system names do not need to be fully qualified; for example, fs0 is as acceptable as /dev/fs0.
StoragePool[,StoragePool...]: Specifies one or more storage pools for which information is to be displayed.
all: Displays information about all the storage pools in specified file system.
-L: Displays detailed information about each storage pool.

Exit status

0: Successful completion.
nonzero: A failure occurred.

Security

If you are a root user, the node on which the command is issued must be able to execute remote shell commands on any other node in the cluster without the use of a password and without producing any extraneous messages. For more information, see Requirements for administering a GPFS file system.

If you are a nonroot user, you may specify only file systems that belong to the same cluster as the node on which the mmlspool command was issued.

Examples

To show basic information about all storage pools in a file system, issue this command:

mmlspool /dev/fst all

The system displays information similar to:

Name                    Id
system                   0
sataXXX              65537

To show more information, issue this command:

mmlspool fs1 p1 -L

The system displays information similar to this:

Pool:
  name               = p1
  poolID             = 65537
  blockSize          = 4 MB
  usage              = dataOnly
  maxDiskSize        = 497 GB
  layoutMap          = cluster
  allowWriteAffinity = no
  writeAffinityDepth = 0
  blockGroupFactor   = 1

Location

/usr/lpp/mmfs/bin