The Delta Resync Configuration - HP XP P9500 Software User's Manual

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Figure 16 Host maintenance at the primary site (3DC Multi-Target configuration)

The Delta Resync configuration

The delta resync configuration creates a Continuous Access Journal copy pair (delta resync pair)

between the local site and remote site in a 3DC Multi-Target configuration. Delta resyncs can be

executed to synchronize the delta resync pair by copying to the remote site only the differential

data between the local and remote sites. This enables operations to continue temporarily in a 3DC

Multi-Target configuration with the local site as the origin with very little downtime, even when the

primary site host stops.

Figure 17 (page 48)

gives an example of a delta resync configuration before a delta resync is

performed, and

Figure 18 (page 48)

gives an example of a delta resync configuration after a

delta resync is performed.

Replication products and data center configurations