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3-46 Chapter 3 Preparing for Universal Replicator z/OS Operations
Hitachi Universal Replicator for IBM /OS User’s Guide
M-VOL
JNLVOL
Restore
JNLVOL
URz
Master
JNLVOL
R-VOL
JNLVOL
Restore
JNLVOL
URz
Master
JNLVOL
業務
Tasks 業務
Tasks
TCz
Synchronous
TCz
Synchronous
TCz Synchronous
secondary site
TCz Synchronous
secondary site
URz
secondary site
URz
secondary site
Primary site
Primary site
M-VOL: main volume
R-VOL: remote volume
Prm data VOL: primary data volume
Sec. data VOL: secondary data volume
JNLVOL:
j
ournal volume
R-VOL/Prm.
data VOL
M-VOL
/Prm
.data VOL
Sec. data VOL Sec. data VOL
Figure 3-25 Changing into 3DC Multi-target Configuration After
Recovering from Primary Site Failures
Transferring Business Tasks from TCz Secondary Site to the Primary Site
(in 3DC Cascading Configuration)
If you follow the operation procedure in section Recovering from Failures in the
Primary Site and the TCz Synchronous Secondary Site and then the system is
changed to 3DC cascading configuration, you can transfer your business tasks
back to the primary site after removing failures from the primary site and
other locations.
To transfer your business tasks back to the primary site, follow the procedure
below. Business Continuity Manager is used in this procedure:
1. Stop business tasks at the TCz Synchronous secondary site.
2. Use Business Continuity Manager to execute the YKSUSPND FORWARD
command to the TCz Synchronous pair.
Note: YKSUSPND is a command for splitting a pair and stopping the copy
operation temporarily.
3. Use the primary volume in the primary site to resume your business tasks.
4. Use Business Continuity Manager to execute the YKRESYNC FORWARD
command on the TCz Synchronous pair, so that the copy direction of the
TCz Synchronous pair will be returned to the original state. The system
configuration changes to the original 3DC multi-target configuration.
Note: YKRESYNC is a command for re-establishing a pair.