HP XP P9500 Storage - Manual (Page 12)

Figure 3 Journals
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. Continuous Access Journal Z requires
paths in both directions. More specifically, it requires paths with Initiator ports in the MCU connected
to RCU Target ports in the RCU, and paths with Initiator Ports in the RCU connected to RCU Target
ports in the MCU.
One data path connection is required. It is recommended that you use two or more independent
connections to provide hardware redundancy. A maximum of eight paths can be used.
For more information, see “Planning the data path” (page 41) .
Extended consistency groups
An extended consistency group (EXCTG) is a collection of journals in which data consistency is
guaranteed. EXCTGs are required when performing copy operations between multiple primary
and multiple secondary systems, or with multiple primary journals in the same array. Associated
journals must be registered in an EXCTG. See
“Planning extended consistency groups (EXCTG) ”
(page 36) for more information.
Remote Web Console
Remote Web Console provides a GUI and command line interface for accessing and managing
the storage system, including Continuous Access Journal Z.
Remote Web Console communicates with the SVP of each system over defined TCP/IP connections.
Business Continuity Manager
With Business Continuity Manager. you can perform the same Continuous Access Journal Z
operations as with the Remote Web Console GUI. In addition, you can automate pair operations
using scripts. Business Continuity Manager also provides system performance metrics thresholds,
which can help you avoid problems and optimize system performance.
Reference Information
The following topics describe Cnt Ac-J Z copy operations and other features.
Overview of copy operations
initial and update copy operations including the underlying operations, such as journal processing
and differential data management.
12 Continuous Access Journal Z overview