Concepts of IBM Storage Scale Data Management API for GPFS

The XDSM standard is intended mainly for a single-node environment. Some of the key concepts in the standard such as sessions, event delivery, mount and unmount, and failure and recovery, are not well defined for a multiple-node environment such as GPFS.

For a list of restrictions and coexistence considerations, see Usage restrictions on DMAPI functions.

All DMAPI APIs must be called from nodes that are in the cluster where the file system is created.