Planning For Continuous Access Journal With Multiple P9500 Systems - HP StorageWorks P9000 User Manual

For planning information, see the following:
"Continuous Access Journal configurations with Continuous Access Synchronous" (page 135)
"Continuous Access Journal configurations with Business Copy" (page 148)
"Continuous Access Journal configurations with External Storage Access Manager" (page 152)
"Sharing Continuous Access Journal volumes " (page 129)
◦ LUN Expansion
◦ Virtual LUN
◦ Cache Residency
LUN Manager
◦
Thin Provisioning
◦
Data Retention
◦
Performance Monitor
◦

Planning for Continuous Access Journal with multiple P9500 systems

A Continuous Access Journal system can be configured with up to four primary P9500 systems
and four secondary P9500 system. Any combination of primary and secondary systems, from one
to four, may be used.
and secondary systems.
Figure 4 Using Continuous Access Journal with multiple storage systems
When primary hosts write data to P-VOLs, the hosts add a time stamp to the data. Secondary
systems check time stamps and then restore data to data volumes in chronological order (older
data are restored earlier), so that data update sequence is maintained.
Please note the following when working with multiple systems:
Remote Web Console computers must be installed at primary and secondary sites.
RAID Manager should be installed on the host in both the primary and secondary sites.
Journal data is updated in the secondary systems based on the same time stamps and sequence
numbers issued by RAID Manager when the host issues the write requests to the primary
Figure 4 (page 29) shows an example configuration with multiple primary
Planning for Continuous Access Journal with multiple P9500 systems
for the following program products:
29