Recovering both IMS and Db2 subsystems

You can use IMS Recovery Expert along with Db2 Recovery Expert to perform a remote site disaster recovery of both IMS and Db2® subsystems to a common point in time.

To use this feature, you will create a disaster recovery profile for an IMS system using IMS Recovery Expert and a disaster recovery profile for a Db2 system using Db2 Recovery Expert. The IMS profile will specify the Db2 system name that is to be recovered to a common point in time and the Db2 profile will specify the IMS system.

When disaster recovery processing is performed at the disaster recovery site, a common recovery point will be determined depending on the availability of a system level backup (SLB) and archives of both subsystems at the disaster recovery site. IMS Recovery Expert will modify the recovery JCL to use the common timestamp.

Notes:
  1. When the disaster recovery profile specifies a Db2 external subsystem, the DR preparation job must execute on the same lpar as the Db2 subsystem so that IMS Recovery Expert can obtain information about active Db2 threads. The BSY#PARM parameter DR_DLIBATCH_OPTION can be set to have the DR preparation job report on and also, if desired, take action based on any DL/I batch jobs that are also attached to Db2.
  2. When setting up for coordinated DR between IMS and Db2, if you are not sharing the repository data sets, you must ensure that your BSYV220 invocation CLIST specifies the data set name of the Db2 control information repository in the EXTCNTFL() variable. You can get this data set name from your ARYV320 Db2 CLIST in the Db2CNTFL() variable.