Backup and recovery with DFHSM

The data facility hierarchical storage manager (DFHSM) does automatic space-availability and data-availability management among storage devices in your system. If you use it, we need to know that it moves data to and from the WebSphere MQ storage automatically.

DFHSM manages your DASD space efficiently by moving data sets that have not been used recently to alternate storage. It also makes your data available for recovery by automatically copying new or changed data sets to tape or DASD backup volumes. It can delete data sets, or move them to another device. Its operations occur daily, at a specified time, and allow for keeping a data set for a predetermined period before deleting or moving it.

We can also perform all DFHSM operations manually. The Data Facility Hierarchical Storage Manager User's Guide explains how to use the DFHSM commands. If you use DFHSM with WebSphere MQ, note that DFHSM does the following:

• Uses cataloged data sets.

• Operates on page sets and logs.

• Supports VSAM data sets.