Manual execution mode
You can start and stop performance monitoring and tier relocation at any time. You should keep the duration of performance monitoring to less than 7 days (168 hours). If performance monitoring exceeds 7 days, then monitoring stops automatically.
Manual execution mode starts and ends monitoring and relocation at the time the command is issued. You can use scripts, which provide flexibility to control monitoring and relocation tasks based on a schedule for each day of the week.
In manual execution mode, the next monitoring cycle can be started with the collection of monitoring data and tier relocation operations performed in parallel. Data from these parallel processes are stored in two separate fields.
- Data while monitoring is in progress in the next cycle.
- Fixed monitoring information used in the tier relocation.
The following figure illustrates the collection of monitoring data to tier relocation workflow in manual execution mode.
Case 1: If the second collection of the monitoring information is finished during the first tier relocation, the latest monitoring information is the second collection. In that case, the first collection of monitoring information is referenced only after the first tier relocation has completed.
Case 2: When tier relocation is performed with the first collection of monitoring information, the second collection of monitoring information can be performed. However, the third collection cannot be started. Because only two fields are used store collected monitoring information, the third collection cannot be overwritten.
In that case, the third collection of the monitoring information is started after the first tier relocation is stopped or tier relocation has completed.
The collection of the monitoring information is not started under these conditions as well:
- When the second tier relocation is performed, the fourth collection of monitoring information cannot be started.
- When the third tier relocation is performed, the fifth collection of monitoring information cannot be started.
If such conditions exist, two cycles of monitoring information cannot be collected continuously while tier relocation is performed.
The following figure illustrates the third collection of monitoring information while tier relocation is performed.
