HYPERWRITE
Use the HYPERWRITE statement to enable or disable IBM® zHyperWrite data replication on a system. If no HYPERWRITE statement is specified, IBM zHyperWrite data replication is enabled on the system by default.
- HYPERWRITE=YES|NO
- Specifies
whether IBM zHyperWrite data replication is enabled
or disabled on a system-wide basis. Note: Certain exploiting applications, such as DB2®, can also provide their own controls to enable or disable the use of this function.IBM zHyperWrite processing can be used by I/O drivers, such as Media Manager, for certain write I/O operations to perform software mirroring to peer-to-peer remote copy (PPRC) devices that are monitored for HyperSwap® processing (with GDPS® or TPC-R). IBM zHyperWrite data replication can be used to reduce latency in these HyperSwap environments. For maximum benefit, IBM zHyperWrite data replication should only be used when all synchronously mirrored relationships are managed by HyperSwap. Devices support IBM zHyperWrite data replication when the following conditions are true:
- The devices support IBM zHyperWrite data replication. Both the primary and secondary devices in a synchronous PPRC relationship must support this function.
- The devices in the synchronous PPRC relationship are managed by HyperSwap (either GDPS HyperSwap or TPC-R HyperSwap).
- NO
- IBM zHyperWrite data replication is disabled.
- YES
- IBM zHyperWrite data replication is enabled system-wide.
Default: YES