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Date and Time Recorded
April 1, 2010 12:45pm
April 1, 2010 01:00pm
April 1, 2010 01:15pm
April 1, 2010 01:30pm
April 1, 2010 01:45pm
April 1, 2010 02:00pm
Table 7-1 - Example of Compacting Log Data
Assuming that compaction is to be carried out
based on the Average and the established time period
is 1 hour, the following log values will be stored in the
database:
Date and Time
April 1, 2010 12:00pm
April 1, 2010 01:00pm
Table 7-2 - Example of Compacting Log Data (Average)
1. Log values that were recorded for the first hour will
be grouped together and compressed by Average.
That is: (10 + 20 + 10 + 20) / 4 = 15.
2. The equivalent value, which is 15, will be stored in
the database; old values (10, 20, 10, and 20) will be
purged.
3. For the next hour, log values will be compressed,
(40 + 5 + 15 + 35) / 4 = 23.75.
4. The compressed value (23.75) will be stored and old
values (40, 5, 15, and 35) will be purged.
If data compaction is to be carried out based on the
Minimum and the established time period is 45 min-
utes, the following data will result:
Date and Time
April 1, 2010 12:00pm
April 1, 2010 12:45pm
April 1, 2010 01:30pm
Table 7-3 - Example of Compacting Log Data (Minimum)
Regardless of the number of instances, the lowest
value recorded within the specified time period will
be stored in the database and the rest will be deleted.
For example, logs that were recorded for the first hour
(10, 20, and 10) comprise two instances of the mini-
mum log value, 10. Only one instance is recorded, the
other is deleted.
Configuration Tools
Value
except that the highest value is recorded:
20
40
5
April 1, 2010 12:00pm
15
April 1, 2010 12:45pm
35
April 1, 2010 01:30pm
10
Table 7-4 - Example of Compacting Log Data (Maximum)
7.2. Configuration Tools
7.2.1. List Power Builder
Reduced Value
Power Builder tool. Power Builder creates large-scale
15
lists by specifying a filter or matching criteria of items
23.75
to add or remove from a list instead of using each item
in the list individually; as a result, large lists can be
built quickly.
from 3 different places in Site Manager: The Watch
Points screen, Schedule Manager page when schedul-
ing to Retrieve Logs By List, and from the Setpoint
Broadcast Scheduler configuration page (Target
Group Controller Group area).
Reduced Value
10
5
10
Figure 7-10 - Power Builder Window
type of lists that the power builder is currently work-
ing with. This can be Watch Points Lists or Target
Same rules apply for compaction by Maximum,
Date and Time
Create, view, edit, and delete lists with the List
The List Power Builder window can be launched
The title in the top left will vary depending on the
Reduced Value
20
45
35
Configuration • 77
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