When a failure occurs on the CCI application (for example, failure of the
server on which CCI is installed) in the MxN configuration of Universal
Replicator, the data consistency in the consistency group that spans multiple
storage systems will not be able to be maintained. Duplication of the CCI
application is a function to use a second CCI application to maintain the data
consistency in the consistency group when a failure occurs in the first CCI
application.
You can use up to two CCI applications per one consistency group for each
site. The following figure illustrates the typical MxN configuration.
When you specify the command device to the HORCM_CMD in the
configuration definition file, you must make the definition sequence of storage
system match within the site, as shown in the following definition file
examples.
Data replication operations with CCI
6-55
Command Control Interface User and Reference Guide
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