HP 3PAR InForm OS 3.1.1 CLI Administrator's Manual

copy volume groups using the command. Restarting remote copy volume groups using the
startrcopygroup command can also initiate a remote copy synchronization on the system.
However, note that with periodic mode volume groups the startrcopygroup command will
only initiate synchronization the first time that it is issued for that volume group. In addition, periodic
mode remote copy volume groups may be automatically resynchronized by systems using Remote
Copy, but only if the resynchronization period has been set for the volume groups.
For remote_copy_sync tasks, there are three phases:
• Phase 1 (startup): sync request has been received and synchronization is scheduled to start.
• Phase 2: performing the resynchronization.
• Phase 3: copying has completed and cleanup (such as deleting snapshots and setting state
values) is taking place.
In the showtask output, the Step column indicates the completed and total volume size, in MBs,
using the format <completed_size>/<total_size>.
Note that for remote copy synchronizations, in the showrcopy output, the finish time for the
resynchronization task may not match the LastSync column in the showrcopy command output
for the system holding the primary volumes. This is because the times are taken at different points.
The task time is set by the task subsystem when it is marked as completed, whereas the LastSync
time is set when remote copy completes the sync. These two times should be similar, but may differ
by up to a few seconds.
You cannot use the canceltask command to cancel a remote copy synchronization task.
For details about volume synchronizations and remote copy commands, see the HP 3PAR Remote
Copy Software User’s Guide.
NOTE: The remote_copy_sync task type requires the HP 3PAR Remote Copy Software license.
The tunevv CLI command requires the HP 3PAR Dynamic Optimization Software license.
tune_vv
The tune_vv task type is used to track tunevv operations performed with the System Tuner
tunevv command. Dynamic Optimization is an optional InForm OS feature that allows you to
identify over-used physical disks and perform load balancing on them. The tunevv command
enables you to perform load balancing and to dynamically change volume parameters.
You can suspend an active tune_vv task using the canceltask command and the task ID as
follows:
cli# canceltask <task_ID>
select q=quit y=yes n=no: y
After cancelling the task, you can perform one of two additional operations:
• You can restart the tunevv operation by usingtunevv 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.
130 Managing Tasks