HP 3PAR Command Line Interface Reference (OS 3.1.2 MU2) (QL226-97016, June 2013)

Wait for all tasks created by this command to complete before returning.
-f
Do not ask for confirmation.
SPECIFIERS
None.
RESTRICTIONS
None
• This command requires a Dynamic Optimization license. Contact your local HP representative
for information.
EXAMPLES
In the following example:
• VVs will be re-balanced between nodes if there is an imbalance in space usage between
nodes of more than 5% (nodepct value).
• PD chunklets will be re-balanced on each node if any disk has usage less than 20% than the
average chunklet usage (chunkpct value).
• A maximum of 4 tune tasks will be run at a time (maxtasks value)..
• A maximum of 5 chunklets will be moved at a time (maxchunk value).
cli% tunesys -f -nodepct 5 -chunkpct 20 -maxchunk 5 -maxtasks 4
Task 999 started
NOTES
• Virtual volumes associated with CPGs which are in Adaptive Optimization configurations will
not be tuned by tunesys.
• When the -cpg option is used, if the user space and snap space of a virtual volume are from
different CPGs, then only the space associated with the named CPG will be tuned. Also, no
tunes will be generated for any virtual volumes outside of CPGs; for example, tunes created
with the createaldvv command.
• When the -cpg option is used or when the user does not have All Domain privileges, intra-node
analysis & tuning will not take place. Intra-node tunes require access across all CPGs and all
domains in order to work correctly.
• When canceling a tunesys command task, the canceltask command can return before
a cancellation is completed. Therefore, resources reserved for the task might not be immediately
available. This can prevent actions like restarting the canceled tunesys command task for
a few minutes.
• tunesys runs between 1 and 3 phases depending on the options specified.
Phase 1 - Analyzes and rebalances space usage between nodes (inter-node tuning).◦
◦ Phase 2 - Analyzes and rebalances space usage between disks associated with each
node (intra-node tuning).
◦ Phase 3 - LD re-layout tunes. LDs where the current characteristics differ from the associated
CPG are re-laid out to mathc the CPG.
• When tunesys is running, showtask will show the current and maximum number of phases
for the task. The steps displayed are the number of subordinate tunes that need to be run to
652 Tune Commands