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3-60 Chapter 3 Preparing for Universal Replicator z/OS Operations
Hitachi Universal Replicator for IBM /OS User’s Guide
Data transfer speed
between hosts and
the MCU
Data transfer speed of journal volumes
Data transfer speed
between the MCU and the RCU
Time
Normal status
Temporary increase in
data to be transferred
Data transfer
speed
Figure 3-33 Data Transfer Speed with URz (Data Transfer Speed
between the Primary Storage System and the Secondary
Storage System)
Bandwidth for Data Transfer Paths
The bandwidth (i.e., the data transfer speed) of data transfer paths between
the primary storage system and the secondary storage system depends on the
user's environment. The bandwidth must exceed the data transfer speed in
"normal status" mentioned earlier.
DKC Journal Transfer Speed
The journal transfer speed of the DKC depends on the number of paths used
for transferring journals. The number of paths for transferring journals must
be so enough that the journal transfer speed exceeds the data transfer speed
in the "normal status" mentioned earlier. The maximum number of paths for
each pair of the primary DKC and the secondary DKC is 8.
Configuration that TagmaStore USP/NSC and USP V is
Connected
URz can execute remote copy operations in a system configuration that USP V
and TagmaStore USP/NSC is connected. Specifically, the following
configurations are supported.