Data Path; Extended Consistency Groups; Remote Web Console - HP XP P9500 User Manual

You use journals to create multiple pairs and to split, resync, and release multiple pairs. Journals
are required on the primary and secondary systems.
Each data volume and its associated journal volume reside in the same journal. This is illustrated
below.
The master journal group contains master journal volumes and is associated with the P-VOL.
The restore journal group contains restore journal volumes and is associated with the S-VOL
Each pair relationship between journals is called a "Mirror". A Mirror ID identifies a pair relationship
between journal groups. When the pair is created, it is assigned a mirror ID.
Figure 3 Journal Groups

Data path

The physical transmission link between the local and remote systems is called the data path.
Continuous Access Journal Z commands and data are transmitted through the fibre channel data
path and switches. The data path is connected to the primary and secondary systems through two
types of Fibre Channel ports, Initiator and RCU Target ports.
One data path connection is required for Continuous Access Journal Z. HP recommends two or
more independent connections to provide hardware redundancy. A maximum of eight paths can
be used.
For more information, see ???.

Extended consistency groups

To maintain data consistency when performing copy operations between multiple primary systems
and multiple secondary systems, the associated journals must be registered in an extended
consistency group (EXCTG). An EXCTG is a collection of journals in which data consistency is
guaranteed. See

Remote Web Console

Remote Web Console communicates with the SVP of each storage system over defined TCP/IP
connections.
Remote Web Console must be LAN-attached to the primary system
Remote Web Console is not required on the secondary system; however having it available
allows you to change Continuous Access Journal Z parameters and access the Continuous
Access Journal Z S-VOL for maintenance or disaster recovery.
12 Continuous Access Journal Z overview
"Planning extended consistency groups (EXCTG)" (page 34) for more information.