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.
