Functions that are performed by the system data mover

Table 1 describes the XRC operations and the functions that are performed by the system data mover.

Table 1. Functions that are performed by the system data mover
During this operation . . . The system data mover . . .
Data shadowing
  • Monitors all updates made to the XRC primary volumes.
  • Transfers the updated records to the journal data sets (only when SESSIONTYPE is XRC).
  • Maintains the XRC session status on the state data set.
  • Applies the updates to the XRC-managed secondary volumes while recording the activity in the control data set.
Disaster recovery
  • Collects information about XRC session status and unapplied updates from the control, state, and journal data sets, and from the master data set, if the session is coupled.
  • Applies any remaining consistency groups to the secondary volumes.
  • Relabels the secondary volumes, and makes them ready for use at the recovery site.
Migration
  • Monitors all updates that are made to the XRC primary volumes.
  • Maintains record status on the state data set.
  • Applies the updates to the XRC-managed secondary volumes.
Migration recovery Relabels the secondary volumes and makes them ready for use at the recovery site.
Parent topic: System data mover