HP XP P9500 Storage - Manual (Page 57)

Operations during primary site host maintenance or a host failure
As show in Figure 18 (page 57) , during primary site host maintenance or a host failure, a 3DC
Multi-Target (Cnt Ac-S Z x Cnt Ac-J Z) configuration can be switched to a 3DC Cascade (Cnt Ac-S
Z x Cnt Ac-J Z) configuration to continue operations by using the Reverse Resync function to reverse
the direction of the Continuous Access Journal Z copy pair between the local and primary sites.
Figure 18 Host maintenance at the primary site (3DC Multi-Target (Cnt Ac-S Z x Cnt Ac-J Z)
configuration)
3DC Multi-Target (Cnt Ac-J Z x Cnt Ac-J Z) configuration
A 3DC Multi-Target (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 two remote sites.
Figure 19 (page 58) shows an example of a 3DC Multi-Target
(Cnt Ac-J Z x Cnt Ac-J Z) configuration.
Replication products and data center configurations 57