Space announcement We are no longer updating this space, and you cannot comment on this space. The RECOVERY PLUS for IMS component is now documented in BMC AMI Backup and Recovery for IMS.

Allocation of input data sets

The Recovery utility can allocate all input data sets dynamically, or you can allocate them explicitly with DD statements in the JCL.

Dynamic allocation is reliable, easy to use, powerful, and flexible. BMC recommends that you use dynamic allocation.

In general, the following information applies to dynamic allocation of input data sets:

  • DBRC must be active, as specified with the DBRC(Y) keyword, so that the utility can retrieve the input data set names from the RECON data sets. If you are using the Recovery Extensions feature for automatic management of additional copies of recovery assets and you select copy 3-10 of an image copy data set or copy 2-10 of a change accumulation data set for input, Recovery Manager (RMGR) must be active.
  • The CATDS/NOCATDS indicator stored in DBRC is honored. If the indicator is set to CATDS, the Recovery utility uses the system catalog to retrieve the unit name, volume serial numbers, and file sequence numbers for the data set; only the data set name is validated by DBRC. If the RECON data sets are initialized with NOCATDS, the Recovery utility uses the data set names, unit names, volume serial numbers, and file sequence numbers stored in DBRC.
  • If you use dynamic allocation, you can use multiple tape or cartridge drives to reduce the time needed to read the input logs.
  • If you use dynamic allocation and data set conflicts occur, a WTOR message is sent to the console operator. The message or messages that accompany the WTOR explain your options.

 

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