HP 3PAR StoreServ 7400 2-node HP 3PAR Command Line Interface Reference (OS 3.1 - Page 651

tunesys DESCRIPTION The tunesys command is used to analyze and detect poor layout and disk utilization across an entire HP 3PAR storage system array. This command runs a series of low level operations to affect a re-balance of resources on the system. SYNTAX tunesys [options] AUTHORITY • Super, Edit • Any role granted the sys_tune right OPTIONS -cpg Limits the scope of a tunesys operation to the named CPG(s). The specified CPGs must all be in the same domain as the user. The -diskpct and -chunkpct options cannot be used with this option. -nodepct Control the detection of any imbalance between LD capacity allocation between nodes. If any LD in a group is greater than the average of the group, then the VVs associated with that LD will be tuned. The parameter must be between 1 and 100. The default value is 3. -chunkpct Control the detection of any imbalance in PD chunklet allocation between PDs owned by individual nodes. If a PD has utilization of less than the average for that device type, then that disk can potentially be tuned. Used in conjunction with the diskpct option. must be between 1 and 100. The default value is 10. This option cannot be used with the -cpg option. -diskpct Specify the percentage of disks identified by the -chunkpct option over which PD chunklet level tuning will be started. must be between 1 and 100. The default value is 10. This option cannot be used with the -cpg option. -maxtasks Specify the maximum number of individual tune tasks which the tunesys command can run at a time. must be between 1 and 8. The default value is 2. -maxchunk Specifies the maximum number of chunklets which can be moved from any PD in a single operation. must be between 1 and 8. The default value is 2. -tunenodech Specify that only intra-node chunklet level rebalancing should be performed. -dr Specify that the command is a dry run and that the system will not be tuned. The result of the analysis can be found in the task detail log (showtask -d taskid). -waittask tunesys 651