HP XP P9000 Command View Advanced Edition Software - Manual (Page 293)

Monitoring performance of remote copies
Replication Manager can monitor the usage ratio of buffers to avoid the overflow of the buffers and
maintain data consistency. You can get notification through SNMP email, based on the predefined
threshold. If you are an administrator you can add volumes to the buffers using Replication Manager.
Replication Manager can also be used to monitor asynchronous remote copying performed using
Continuous Access Asynchronous or Continuous Access Journal. Write delay time or consistency time
delta (C/T delta) can be monitored to acquire transfer delay status from volume replication facilities.
You can display the transfer delay state between the primary and secondary volumes for each copy
group.
This module describes methods for monitoring performance of remote copies:
• About performance monitoring , page 293
• Checking the performance of remote copies , page 294
• Monitoring transfer delay state of remote copies , page 294
• Monitoring resource utilization (pools and journal groups) , page 296
About performance monitoring
Performance monitoring is available when the system uses asynchronous remote copy functionality,
such as Continuous Access Asynchronous or Continuous Access Journal, or copy functionality based
on snapshot images, such as Snapshot/Fast Snap.
The following table summarizes the types of information available to find out if the target copy group
is maintaining the predefined performance level.
You can check the usage of the following buffers:
• When using Continuous Access Asynchronous: sidefiles, which are stored in cache
memory areas of the storage system to which the primary and secondary volumes belong
• When using Continuous Access Journal: journal volumes that correspond to the primary
and secondary volumes
• When using Snapshot/Fast Snap in open systems: pool volumes for storing the differential
data used to create snapshot images (virtual volumes)
Buffer usage
You can check the time required to write data of the primary volume to the secondary volume
based on the write delay time.
Write delay
time (C/T
delta)
To view the workflow for checking the performance of remote copies, see “ Checking performance
workflow (remote copies) ” on page 294.
If necessary, you can export the performance history to a CSV or HTML file. (Note that you can export
only data whose retention period has not expired.)
TIP:
You can use the alert function to monitor buffer usage. When the performance value exceeds the
defined threshold, an alert is reported by e-mail or SNMP trap. See “
Enabling or disabling alert
settings ” on page 336 for more information.
User Guide 293