HP XP P9500 Storage - Manual (Page 10)

A Continuous Access Journal Z system consists of the following:
•
P-VOLs and S-VOLs on the local and remote P9500
•
Master and restore journal volumes on the local and remote P9500
•
Master and restore journals on the local and remote P9500
The master journal consists of the primary volume(s) and master journal volume(s). ◦
◦ The restore journal consists of the secondary volume(s) and restore journal volume(s).
When Continuous Access Journal Z journals consist of journal volumes located in multiple systems,
a host I/O time stamping function is required. This is provided by MVS DFSMSdfp.
An error reporting communications (ERC) feature is also required when Continuous Access Journal
Z is to be used for disaster recovery.
Management software consists of:
•
Remote Web Console graphical user interface (GUI)
•
Business Continuity Manager
•
Configuration File Loader
NOTE:
•
Continuous Access Journal Z processing continues uninterrupted if the SVP reboots or even if
the SVP fails.
•
Continuous Access Journal Z does not support operations in which one P-VOL is copied to
more than one S-VOL, or more than one P-VOL is copied to one S-VOL.
Continuous Access Journal Z components are illustrated in the following figure and described in
greater detail in the following sections.
Figure 2 Continuous Access Journal Z components
P9500 storage systems
Continuous Access Journal Z is operated using two P9500 storage systems, one at the primary
and one at secondary sites. The primary system consists of the main control unit (MCU) and the
SVP . The secondary system consists of the remote control unit (RCU) and the SVP.
•
The primary system communicates with the secondary system over dedicated fibre channel
remote copy connections.
•
The P9500 system can function simultaneously as a primary and secondary system.
10 Continuous Access Journal Z overview