IBM General Parallel File System for AIX: Data Management API Guide

Parallelism in Data Management applications

Given the multi-node environment of GPFS, it is desirable to exploit parallelism in the DM application as well. This can be accomplished in several ways:

• On a given session-node, multiple DM application threads can access the same file in parallel, via the same session.
• Multiple sessions, each with event dispositions for a different file system, can be created on separate nodes. Thus, files in different file systems can be accessed independently and simultaneously, from different session nodes.
• Dispositions for events of the same file system can be partitioned among multiple sessions, each on a different node. This distributes the management of one file system among several session nodes.

There is no limit on the number of threads that can invoke DMAPI functions simultaneously on each node.