HP XP P9500 Storage User Manual
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The Delta Resync standby status must be defined between the local site and remote site.
The 3DC Cascade (Cnt Ac-S Z x Cnt Ac-J Z) configuration
A 3DC Cascade (Cnt Ac-S Z x Cnt Ac-J Z) configuration performs Continuous Access Synchronous
Z and Continuous Access Journal Z operations from the primary site to the nearby intermediate
site, and from the intermediate site to the distant remote site. This enables the secondary host to
use no-data-loss data at the intermediate site during maintenance or in the event of a relatively
small-scale regional disaster. If a wider area disaster occurs, the secondary host can use data on
the distant remote site.
shows an example of the 3DC Cascade (Cnt Ac-S Z x Cnt Ac-J Z) configuration.
Figure 13 A 3DC Cascade (Cnt Ac-S Z x Cnt Ac-J Z) configuration example
NOTE:
When the Primary site is operating normally, there is no need for the hosts at the
intermediate and remote sites to operate.
3DC Cascade (Cnt Ac-J Z x Cnt Ac-J Z) configuration
A 3DC Cascade (Cnt Ac-J Z x Cnt Ac-J Z) configuration consists of three Continuous Access Journal
Z sites, in which Continuous Access Journal Z is used to perform a remote copy from the primary
site to the intermediate site, and from the intermediate site to the remote site.
shows an example of the 3DC Cascade (Cnt Ac-J Z x Cnt Ac-J Z) configuration.
Replication products and data center configurations
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