HP 3PAR InForm OS 3.1.1 CLI Administrator's Manual

The following examples shows how to start, cancel, and then rollback a tunevv operation on
virtual volume testvol:
cli% tunevv -t r5 -ha mag testvol
Task 3 started.
cli% canceltask 1
Are you sure you want to cancel task 3?
select q=quit y=yes n=no: y
cli% tunevv -rollback testvol
Task 4 started.
Note that the tune_vv_rollback task is a new task and takes a new task ID number.
You cannot start a tune_vv_rollback task for a tunevv operation that completed successfully.
The following error message appears:
cli% tunevv -rollback testvol2
Are you sure you want to rollback the tune process for VV 'testvol2' ?
select y=yes n=no: y
Command failed
error: No restart state for VV testvol2.
For tune_vv_rollback tasks, there are two phases:
• Phase 1: performing the actual region moves.
• Phase 2: deleting the information stored in Phase 1 of the corresponding tune_vv task.
The number of steps in the phase is equal to the number of regions being moved.
For more information on System Tuner and the tunevv command see “Performance Tuning”
(page 144), and the HP 3PAR InForm OS Command Line Interface Reference.
For more information about the tunevv command, see “Performance Tuning” (page 144).
CAUTION: Rollback operations should not be performed on Thinly-Provisioned Virtual Volumes.
NOTE: The tunevv CLI command requires the HP 3PAR Dynamic Optimization Software license.
tune_sys
The tune_sys task type is used to track operations performed with the tunesys command.
The tune_sys task has three phases:
• Phase 1: analyze the system, detect any virtual volume capacity imbalance between nodes,
and rebalance the virtual volumes.
• Phase 2: detect any chunklet imbalance between physical disks associated with the same
node and rebalance the chunklets.
• Phase 3: analyze the system and perform a consistency check on logical disks to verify they
match the characteristics of any CPG to which the logical disk belongs. Any logical disks that
do not match are modified to match the characteristics of the CPG.
The tune_sys task output displays information about the tuning process including:
• Summary of tunesys command parameters.
• Physical disk analysis.
132 Managing Tasks