Hp XP Command View Advanced Edition Software Uživatelský manuál stáhnout pdf (Strana 287)

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 287

• Checking the performance of remote copies, page 287

• Monitoring transfer delay state of remote copies, page 288

• Monitoring resource utilization (pools and journal groups), page 290

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 288.

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 330 for more information.

Checking the performance of remote copies

TIP:

You can check the performance of remote copies when system operation uses asynchronous remote

copy functionality. See “About performance monitoring” on page 287 for more information.

User Guide 287

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Hp XP Command View Advanced Edition Software Uživatelský manuál Strana 287