HP 3PAR StoreServ 7400 2-node HP 3PAR Command Line Interface Administrator& - Page 159
Removing a QoS Rule, Clear QoS, Disable QoS
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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 |. 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