Setting up to copy volumes with on-site mirroring tools

Follow this procedure if you want to create volume copies by using a mirroring tool or another P.I.T. copy tool that you have on site.

A mirroring tool establishes a relationship between the source and target volumes, waits for the data to be copied to the target volume, and then splits the mirror relationship at the appropriate point in time. Mirroring tools include IBM® PPRC and EMC TimeFinder/Mirror. Other copy tools also create a P.I.T. copy. These tools include Softek Replicator and Innovation Data Processing FDRPAS.

Note: If you want IMS Cloning Tool to invoke IBM FlashCopy® or STK SnapShot via DFSMSdss to create volume copies, see Setting up to copy volumes with FlashCopy or SnapShot.

Place the steps for performing this function within a job stream, typically in multiple locations for the function steps to run at the appropriate times relative to the activities of the application. These steps are invoked with commands to a common program.

If multiple IMS Cloning Tool commands are supplied within the same step, a command that results in a return code equal to or greater than 8 terminates the step. For instance, if the COPY and RENAME commands are in the same step, and COPY terminates with the return code of 8 because of insufficient target volumes, the RENAME command is bypassed.

The following commands are available:

FINDUCATS: Locates the ICF user catalogs that point to the source-volume data sets.
COPY: Backs up source ICF catalog data that points to data sets on the source volumes and optionally clips and varies target volumes online.
RENAME: Renames and catalogs the target-volume data sets.
BCSCLEAN: Deletes catalog entries from previous IMS Cloning Tool executions.

Several commands that are specific to cloning IMS subsystems are not discussed in this chapter. For information about these commands, see Cloning IMS subsystems.