HP 3PAR Command Line Interface Administrator's Manual: HP 3PAR OS 3.1.2 (QR482-96525, September 2013)

The integer value for bandwidth in the setqos command can optionally be followed with:
• k or K to indicate a multiple of 1000
• m or M to indicate a multiple of 1,000,000
• g or G to indicate a multiple of 1,000,000,000
If you specify "none", there is no limit on I/O issue bandwidth rate.
The CLI offers a number of features that are not available in the MC. For example, a QoS rule can
be created with the setqos command and be kept inactive by using the -off option.
All user-defined rules can be switched off simultaneously by using the setqos –off vvset:*
command; use the setqos –on vvset:* command to enable them again.
Rules can be shown in ordered form by issuing the showqos –sortcol X,[inc|dec], where
X is the column number, and inc and dec sort on increasing or decreasing values in the column,
respectively. Column counting in the output of showqos starts with the left column, which is
numbered 0. Figure 18 (page 159)shows output of the showqos command, with the sorting option
set on decreasing IOPS value.
Figure 18 Showqos Command Output
An option of particular interest for setqos is –vv <name>|<pattern>. This option changes
the QoS rule, for all VVsets that include VVs with names matching any of the names or patterns
specified, to the value contained in the setqos statement. If a VV is in a VVset for which no QoS
rule has yet been defined, a new rule is created with the limits in the setqos command.
The built-in rule all_others is switched off by the command setqos –off sys:all_others.
The showqos and statqos command provide a centralized view of the QoS rules in the systems
and how the workloads conform to them.
Executing the QoS CLI commands requires a logon to an account with Super or Edit rights. Any
role granted the qos_set right can set QoS configurations. QoS rules can be scheduled using the
createsched command for automated QoS policy changes for example to adapt to day/night or
weekday/weekend workload conditions.
Another new HP 3PAR CLI command, srstatqos, displays historical performance data reports
for the QoS rules. This command is integrated in HP 3PAR System Reporter (SR) on the 3PAR nodes.
SR 3.1 MU1, installed on a separate server, includes statistics on QoS. To learn more about the
QoS information in SR, see the HP 3PAR System Reporter 3.1 Software User's Guide and the HP
3PAR System Reporter 3.1 Software Release Notes.
Removing a QoS Rule
To remove a QoS rule, click the Clear QoS option (see the menu in Figure 11 (page 155)). Clearing
a QoS rule does not require first disabling the rule.
The Disable QoS option deactivates an enabled rule. When the rule for a VVset is disabled, the
Enable QoS selection (see Figure 11 (page 155)) becomes active.
Using HP 3PAR Priority Optimization 159