HP StorageWorks XP Remote Web Console Software User Manual
Page 78
3DC multi-target configuration provides 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.
•
“Hardware Configuration” (page 79)
•
•
“Requirements for Creating URz Pair for Delta Resync Operation” (page 81)
•
“Requirements for Performing Delta Resync Operation” (page 81)
•
“Recovering from Failures in the Primary Site” (page 82)
•
“Recovering from Failures in the Primary Site ” (page 84)
•
“Changing to 3DC Multi-target Configuration after Recovering from Primary Site Failures”
(page 85)
•
“Transferring Business Tasks from TCz Secondary Site to the Primary Site” (page 86)
•
“Transferring Business Tasks from TCz Secondary Site to the Primary Site” (page 86)
•
•
“Transferring Business Tasks from TCz Secondary Site to the Primary Site” (page 88)
•
“Recovering from Failures in the Primary Site and the TCz Synchronous Secondary Site” (page
90)
•
“Transferring Business Tasks from the URz Secondary Site to the Primary Site” (page 91)
illustrates a 3DC multi-target configuration where URz and TCz Synchronous
are combined. In this configuration, there are three sites as follows:
•
Primary site for both TCz Synchronous and URz
•
Secondary site for TCz Synchronous
•
Secondary site for URz
Figure 37 3DC Multi-target Configuration (Combining URz with TCz Synchronous)
In this configuration, the primary volume in the primary site is paired with the secondary volume
for TCz Synchronous. This primary volume is also paired with the secondary volume for URz. If a
host in the primary site writes data to the primary volume, the data will be written to the TCz
Synchronous secondary volume in real time, synchronously with writing from the host. The data
78
Requirements and Restrictions for Universal Replicator z/OS Operations