Extended remote copy (XRC)

Remote copy offers two options for your disaster recovery and workload migration needs: extended remote copy (XRC) and peer-to-peer remote copy (PPRC). XRC addresses the problem of unrecoverable data that occurs between the last, safe backup of a primary system to a recovery system and the time when the primary system fails.

XRC provides an asynchronous copy operation, over distance, with minimal performance impact to primary system DASD I/O write operations.

XRC supports only System z®-attached (count key data, or CKD) devices. This includes data running on z/OS®, z/VM® and Linux.

XRC functions can be dispatched on a zIIP processor if one is available. To enable XRC for operating on a zIIP processor, use the zIIPEnable parameter in the ANTXIN00 PARMLIB member, as shown in Table 1. For more general information about zIIP processing, refer to the section about using the System z Integrated Information Processor in z/OS MVS Planning: Workload Management. See also z/OS RMF Report Analysis for information on how to monitor zIIP processing.

For additional information about:

XRC, refer to What is remote copy?.
Planning for XRC, refer to Planning for extended remote copy.
Setting up your XRC environment, refer to Setting up the extended remote copy environment.
Issuing XRC commands, refer to Extended remote copy command descriptions.
Managing your XRC environment, refer to Managing extended remote copy operations.
Managing Coupled XRC sessions, refer to Managing coupled extended remote copy sessions.
Recovering your data with XRC, refer to Extended remote copy data recovery operations.
Migrating data with XRC, refer to Migrating data with extended remote copy.
Recovering from error conditions using XRC, refer to Recovering from error conditions using extended remote copy.