Auto execution mode performs monitoring and tier relocation based on information collected by monitoring at a specified constant frequency: every 0.5, 1, 2, 4, or 8 hours. All auto execution mode cycle frequencies have a starting point at midnight (00:00). For example, if you select a 1 hour monitoring period, the starting times would be 00:00, 01:00, 02:00, 03:00, and so on.

As shown in the following table, the 24-hour monitoring cycle allows you to specify the times of day to start and stop performance monitoring. The 24-hour monitoring cycle does not have to start at midnight. Tier relocation begins at the end of each cycle.

Monitoring cycle (hours)	Start Times	Finish Times
0.5	0.5 hours from 00:00 AM. For example 00:00, 00:30, and 01:00	0.5 hours after the start time
1	1 hour from 00:00 AM. For example 00:00, 01:00, and 02:00	1 hour after the start time
2	2 hours from 00:00 AM. For example 00:00, 02:00, and 04:00	2 hours after the start time
4	4 hours from 00:00 AM. For example 00:00, 04:00, and 08:00	4 hours after the start time
8	8 hours from 00:00 AM. For example 00:00, 08:00, and 16:00	8 hours after the start time
24 (monitoring time period can be specified)	Specified time	Specified time

If the setting of the monitoring cycle is changed, performance monitoring begins at the new start time. The collection of monitoring information and tier relocation operations already in progress are not interrupted when the setting is changed.

Example 1: If the monitoring cycle is changed from 1 hour to 4 hours at 01:30 AM, the collection of monitoring information and tier relocation in progress at 01:30 AM continues. At 02:00 AM and 03:00 AM, however, monitoring information is not collected and tier relocation is not performed. From 04:00 AM, the collection of monitoring information and tier relocation operations are started again. These operations are then performed at 4-hour intervals.

Example 2: If the monitoring cycle is changed from 4 hours to 1 hour at 01:30 AM, the collection of monitoring information and tier relocation in progress at 01:30 AM continues. From 04:00 AM, the collection of monitoring information and tier relocation operations are started again. These operations are then performed at 1-hour intervals.

In auto execution mode, the collection of monitoring data and tier relocation operations are performed in parallel in the next cycle. 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.