Figure 14 VVset Icon for QoS Configuration
For VVset QoS configuration, the
Target Type
field in the
Configure QoS
dialog box has a second
value,
System
(see
Figure 15 (page 157)
).
Figure 15 System Target Type in Configure QoS Dialog Box
A
System
target-type rule governs all VVsets and VVs that are not subject to explicit QoS rules.
You must be very careful when defining the limits for the ‘System Target Type. To ensure that at
least some IOPS and bandwidth is available to all the volumes under this rule, HP 3PAR Priority
Optimization enforces a minimum value for the I/O limit of 1000 IOs/sec and 100,000 KBs/sec
for the bandwidth limit, although these limits may be far too low for some environments. If lower
values are entered, a popup message appears, showing information about the minimum values,
and closes the configuration window. If the
System
QoS rule is configured, its defined values will
show up in the configuration window, and changes can be made to it.
Figure 16 (page 158)
shows
how the
System
target is displayed in the
QoS
tree in the
Provisioning
pane in the HP 3PAR MC.
Using HP 3PAR Priority Optimization
157
