Monitoring Capacity And Performance; Monitoring Pool Capacity; Monitoring Performance - HP XP7 User Manual

3. In the Selected LDEVs table of the Create LDEVswindow, select the LDEV, then click Remove.
The message appears asking whether you want to remove the selected row or rows. Click
OK.
4. Click Finish.
5. In the Confirm window, click Apply.
The LDEV is removed.
If Go to tasks window for status is checked, the Tasks window opens.

Monitoring capacity and performance

Monitoring pool capacity

The storage system monitors the pool's free capacity in accordance with threshold values defined
when you create pools. If the pool capacity reaches the threshold values, warnings are issued as
SIMs and as SNMP traps to the open-systems host.
You can provision a larger virtual capacity beyond the pool capacity by using THP V-VOLs of Thin
Provisioning Z. However, when the pool's free capacity is depleted, you can lose access to THP
V-VOLs that require more pool capacity. For example, if the pool usage rate is 100% due to
increased write operations, then I/O is not accepted and I/O will be stopped for a THP V-VOL
that failed to receive needed pool capacity. Therefore, you should carefully monitor the pool usage
or pool free capacity, as well as the level of provisioned virtual capacity.

Monitoring performance

You can monitor system performance using Performance Monitor. For more information, see the
HP XP7 Performance for Open and Mainframe Systems User Guide.
You can monitor information on pools and THP V-VOLs using RAID Manager. For more information,
see the HP XP7 RAID Manager User Guide.
The following activities help you to monitor and control performance of the THP V-VOL. Collecting
monitor information and subsequent tuning may increase throughput and the operating rates.
Collecting monitor information.Collecting the following monitor information helps you determine
the pool load (including the access frequency, and the access load upon data drives) and
THP V-VOL load (including the access frequency). You can then use this monitor information
to tune the appropriate allocation.
◦
Access frequency of THP V-VOL, read hit rates, and write hit rates (using Performance
Monitor)
◦
Usage rates of parity groups of pools (using Performance Monitor)
◦
Pool usage (using Remote Web Console).
◦
THP V-VOL usage (using Remote Web Console).
◦
Smart Tiers Z performance monitoring of pool storage
Possible tuning actions (without Smart Tiers Z). The following techniques using Business Copy
Z will move a THP V-VOL.
◦
The THP V-VOL is copied using Business Copy Z from a pool with an I/O bottleneck. For
more information, see the HP XP7 Business Copy for Mainframe Systems User Guide.
◦
Business Copy Z copies a THP V-VOL with a high I/O load to a pool with a lower access
level to adjust the pool load.
134 Configuring thin provisioning