HP 3PAR InForm OS 3.1.1 CLI Administrator's Manual

• Internode balance analysis.
• Intranode balance analysis.
For more information about the tunesys command, see “Performance Tuning” (page 144).
NOTE: A dirty disk is a disk with chunklets that are determined to be out of balance during the
analysis phase. A clean disk is a disk with balanced chunklets.
NOTE: The tunesys command waits for chunklet cleaning between tuning operations in order
to maximize the amount of space available for the next tuning operation.
NOTE: The tunesys CLI command requires the HP 3PAR Dynamic Optimization Software
license.
tune_sd
The tune_sd task type is used to track the movement of the logical disks used for the volume’s
snapshot space to the specified CPG. Changing the layout of a virtual volume with the tunevv
commands requires the HP 3PAR Dynamic Optimization Software license. For more information
about tuning virtual volumes, see “Performance Tuning” (page 144).
For tune_sd 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.
scheduled_task
The scheduled_task task type is used to track system operations initiated by the System Scheduler
commands. See Table 11 (page 134) for a complete list of the System Scheduler commands. See
Table 12 (page 134) for a complete list of the CLI commands that can be initiated with the System
Scheduler commands. The scheduled_task task type has only one phase and one step.
snapspace_accounting
The snapspace_accounting task type tracks the progress of the snapshot space usage
accounting process and runs the updatesnapspace command. The snapshot space usage
displayed by showvv-s is not necessarily the current usage. You have to run another command
showvv -hist to see when To display the last time updatesnapspace was run on the virtual
volumes, run the showvv -hist command. The TimeCalculated column shows the last time
the usage was last calculated. The updatesnapspace command causes the system to start
calculating current snapshot space usage. If one or more virtual volume names or patterns are
specified, only the specified virtual volumes are updated. If no virtual volume names are specified,
all virtual volumes are updated.
This command immediately returns the task ID associated with the updated snapshot space usage
accounting process. The canceltask command cannot be used to cancel the
snapspace_accounting task type. To wait for completion, use the waittask command. The
snapspace_accounting task type has only one phase, and the number of steps is equal to the
number of virtual volumes affected by the updatesnapspace command.
system_task
The system_task task type tracks the housekeeping tasks periodically run by the system. You
can display any active housekeeping tasks with the showtask-all command. Only the 3parsvc
user can run, change, or remove these tasks.
Task Types 133