3PAR InForm® OS 2.3.1 CLI Administrator's Manual (320-200180 Rev B, February 2010)

13.15
Task Types
InForm OS Version 2.3.1 3PAR InForm CLI Administrator’s Manual
13.3.7 tune_vv
The tune_vv task type is used to track tunevv operations performed with the 3PAR System
Tuner
tunevv command. The 3PAR System Tuner is an optional InForm OS feature that allows
you to identify over-used physical disks as candidates for load balancing and perform load
balancing on them. The
tunevv command enables you to perform load balancing and to
dynamically change certain volume parameters.
You can suspend an active
tune_vv task using the canceltask command and the task ID as
follows:
AFter cancelling the task, you can perform one of two additional operations:
■ You can restart the tunevv operation by using
tunevv restart command. This starts a tunevv_restart task.
■ You can completely reverse the tunevv operation by using
tunevv rollback command. This starts a tune_vv_rollback task.
For
tune_vv tasks, there are three phases:
■ Phase 1: storing away region move information for future restarts and/or rollbacks.
■ Phase 2: performing the actual region moves.
■ Phase 3: deleting the information stored in Phase 1.
The number of steps in the phase is equal to the number of regions being moved.
For more information about the 3PAR System Tuner and the
tunevv command, see
Chapter 16, Performance Tuning.
cli# canceltask <task_ID>
select q=quit y=yes n=no: y
NOTE: The tune_vv task type and tunevv CLI command require the 3PAR
Dynamic Optimization license.