HP StorageWorks XP Replication Monitor software installation and configuration guide (T1784-96008, November 2006)

Appendix A Scheduling considerations for collecting copy pair configuration and status information 115
Appendix A Scheduling considerations for collecting
copy pair configuration and status information
XP Replication Monitor software collects information about the configuration and status of copy pairs at regular
intervals set by the user (auto refresh function). When designing the system, bear in mind how XP Replication
Monitor software collects information and consider what intervals are appropriate for your system configuration
and operation.
This appendix describes points to consider when setting collection intervals. For information on setting up the
refresh function, see section
3-5 . For details about how the refresh function works, see the manual HP
StorageWorks XP Replication Monitor software user's guide.
A.1 Interval and start time considerations for collecting copy pair
configuration information
In an open system, copy pair configuration information is collected from the Device Manager servers registered
as information sources with XP Replication Monitor software. In a mainframe system, information is collected from
the Business Continuity Managers registered as information sources with XP Replication Monitor software. You
can set the following intervals for collecting copy pair configuration information. By default, the collection interval
is set as 24 hours and the start time is set as 03:02.
• NONE: Do not refresh periodically.
• 8 hour: Refresh every 8 hours.
• 12 hour: Refresh every 12 hours.
• 24 hour: Refresh every 24 hours.
Set the collection interval and start time at a time of day when the system is not busy, to minimize the impact on
application processing performance. You can choose tonot collect configuration information at regular intervals if
the copy pairs in your system remain unchanged.
In an open system, if the Device Manager database is updated at regular intervals, set XP Replication Monitor
software to collect copy pair configuration information after a database update is performed.
A.2 Interval considerations for collecting copy pair status
information
When the XP Replication Monitor agent is used in an open system, copy pair status information is collected from
Raid Manager XP on the pair management servers. When the XP Replication Monitor agent is used in a
mainframe system, information is collected from the Business Continuity Managers on the pair management
servers. You can set a value from 3 minutes to 60 minutes as the interval for periodically collecting copy pair
status information. The default value is 5 minutes.
Decide the interval for collecting copy pair status information based on the number of copy pairs monitored by
each pair management server. The following table describes guideline values.
Table A.1 Guidelines for settings the interval for collecting copy pair status information
Number of Copy Pairs Recommended Information Collection Interval
0 to 1000 3 minutes
1,001 to 2,000 5 minutes
2,001 to 3,000 10 minutes
3,001 to 5,000 15 minutes
NOTE: Make sure that no more than 5,000 copy pairs are managed by one XP Replication Monitor server. If
the number of copy pairs exceeds this limit, monitoring from XP Replication Monitor software may not be
possible.