HP StorageWorks XP Remote Web Console Software - Manual (Page 83)

10. Use volumes in the primary site to resume your business tasks.
11. Execute the YKDELETE command onto journal groups that will make a Universal Replicator for
Mainframe pair between the intermediate site and the secondary site.
The system returns to the status before the 3DC cascading configuration was set up.
For detailed information about Business Continuity Manager usage and copy statuses, see the HP
Business Continuity Manager Software User's Guide.
TrueCopy for Mainframe Synchronous (3DC Multi-target Configuration)
The XP storage system provides the function to combine Universal Replicator for Mainframe and
TrueCopy for Mainframe Synchronous. In a system where Universal Replicator for Mainframe and
TrueCopy for Mainframe Synchronous are combined, there are one primary site and two secondary
sites. One of the secondary sites is for synchronous remote copy, and is usually located at a short
distance from the primary site. The other secondary site is for asynchronous remote copy, and is
usually located at a long distance from the primary site. Such a system configuration is called a
three data center (3DC) multi-target configuration.
A 3DC multi-target configuration provides a solution for disaster recovery and business continuity.
Even when a disaster or failure occurs at two sites at the same time, you can restart your business
tasks by using data in the remaining secondary site.
The figure below illustrates a 3DC multi-target configuration where Universal Replicator for
Mainframe and TrueCopy for Mainframe Synchronous are combined. In this configuration, there
are three sites as follows:
•
Primary site for both TrueCopy for Mainframe Synchronous and Universal Replicator for
Mainframe
•
Secondary site for TrueCopy for Mainframe Synchronous
•
Secondary site for Universal Replicator for Mainframe
Figure 34 3DC Multi-target Configuration (Combining Universal Replicator for Mainframe with
TrueCopy for Mainframe Synchronous)
In this configuration, the primary volume in the primary site is paired with the secondary volume
for TrueCopy for Mainframe Synchronous. This primary volume is also paired with the secondary
volume for Universal Replicator for Mainframe. If a host in the primary site writes data to the primary
volume, the data will be written to the TrueCopy for Mainframe Synchronous secondary volume
in real time, synchronously with writing from the host. The data will also be written to the Universal
Replicator for Mainframe secondary data volume, asynchronously with writing from the host.
Interoperability with Other Products and Functions 83