Modifying IBM Spectrum Scale service configurations

The IBM Spectrum Scale service has standard and advanced configuration panels.

Click Ambari GUI > Spectrum Scale > Configs tab.
Service configurations

Limitation

Key value pairs that are newly added into the IBM Spectrum Scale management pack GUI Advanced configuration Custom Add Property panel do not become effective in the IBM Spectrum Scale file system. Therefore, any values not seen in the Standard or Advanced configuration panel need to be set manually on the command line using the IBM Spectrum Scale /usr/lpp/mmfs/bin/mmchconfig command.
Add property

In Ambari, if any configuration in the gpfs-site is changed in the IBM Spectrum® Scale dashboard, a Stop All1 service followed by a Start All service is required. Check your environment to ensure that the changes made are in effect.

1For FPO cluster, do not run STOP ALL from the Ambari GUI. Refer to the Limitations > General sections on how to properly stop IBM Spectrum Scale.

Note: You must plan a cluster maintenance window and prepare for cluster downtime when restarting the IBM Spectrum Scale service and the HDFS service. Ensure that no I/O activities are active on the IBM Spectrum Scale file system before shutting down IBM Spectrum Scale. If the I/O activities are active, IBM Spectrum Scale fails to shut down as the kernel extension cannot be unloaded.