HP XP P9000 Provisioning for Mainframe Systems User Guide

Cautions when using monitoring modes
• If Continuous mode is used, best practice is to collect monitoring information using the following
execution modes:
◦ Auto execution mode
◦ Manual execution mode with collecting the periodic monitoring information by defining
a script using RAID Manager
If the Manual execution mode is used without scripts, the Continuous monitoring mode can
be set. However, in this case, unexpected results may be calculated because the weighted
average efficiency is calculated based on very different duration (short and long) periods
information obtained in the past cycles.
• When the monitoring mode is set to Continuous, the Remote Web Console window and RAID
Manager display the frequency distributions of each pool and V-VOL calculated by using the
monitor value on which the weighted calculation is done.
These calculated values are the predictive values for the next cycle after successfully relocating
all pages. Therefore, these values may differ from an actual monitoring result when they
appear.
In Performance Utilization of each tier, regardless of the type of the monitoring mode setting,
the Remote Web Console window and RAID Manager display the monitor values which were
already collected in the current cycle.
If you switch the monitoring mode from Period to Continuous or from Continuous to Period,
the current cycle’s monitoring data that is being collected is not discarded. However, the data
calculated by using past monitor cycle information on which the weighted calculation is done
will be reset.
Notes on performing monitoring
• You can collect a new cycle of monitoring data while performing relocation.
• After monitoring stops, the tier range is automatically calculated.
• The latest available monitoring information, collected just before the relocation is performed,
is used for relocation processing.
• When relocation is performed, the status of the monitor information must be valid (VAL).
Downloading the tier relocation log file
You can download the log file that contains the results of past tier relocations. See “Tier relocation
log file contents” (page 83) for information about the contents of the log.
1. Using Remote Web Console, in the Storage Systems tree select Pool.
2. In the Pool window, click More Actions > Tier Relocation Log.
3. In the progress dialog box, click OK.
4. A dialog box opens allowing you to select where to download the file. Specify the folder in
which to download the file, and then click Save.
If you change the file name from the default, make sure the file name contains the .tsv extension
before saving a renamed file.
82 Configuring thin provisioning