Change When Same Day, Same Hour Baseline Averages Are Calculated

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Change When Same Day, Same Hour Baseline Averages Are Calculated

Initially, when a limited amount of data has been collected, the baseline average is calculated for the same hour for every preceding day of the week.

When more data is available, a switchover in the calculation method occurs automatically and Data Aggregator establishes "normal" by averaging hourly samples across available preceding same days of the week.

By default, this automatic switchover occurs when at least 3 same day of the week, same hour data samples are available for the past 12 weeks. You can change when this automatic switchover occurs.

Consider the following information about changing when same day of the week, same hour baseline averages are calculated:

You have the option of changing both attributes, or just one of the attributes.
Both attribute values must be a numeric value that is greater than or equal to 1.
No upper limit is enforced. However, the retention policy of the hourly roll ups defines the upper limit. By default, the hourly retention rate is 90 days (which is approximately 12 weeks of data). If you increase the maximum number of preceding weeks, increase the hourly roll-up retention rate also.
The MinimumNumberOfRequiredDataPoints attribute value must be less than or equal to the MaximumNumberOfWeeks value.

Follow these steps:

Enter the following information in a web browser:
http://hostname:port/rest/sdshbaselineconfig

hostname:port

Specifies the Data Aggregator host name and the port number.

Default port: 8581

The sdshbaselineconfig webservice endpoint URL opens.
Review the current values for the minimum required number of data points and the maximum number of preceding weeks.
Open a REST client editor or HTTP tool that sends requests and gets responses and set the Content-type to application/xml.
Enter the following criteria:
- HTTP method = PUT
- Enter the minimum required number of data points within the maximum number of preceding weeks (to trigger the switchover in the baseline calculation method) that you want to change on the Body tab in the HTTP Request pane.
  For example:
```
<SdshBaselineConfiguration version="1.0.0">
```
```
 <SDSHSettings>
```
```
  <MinimumNumberOfRequiredDataPoints>5</MinimumNumberOfRequiredDataPoints>
```
```
  <MaximumNumberOfWeeks>10</MaximumNumberOfWeeks>
```
```
  </SDSHSettings>
```
```
</SdshBaselineConfiguration>
```
In this example, the minimum number of data points to be available for baseline average calculation has been changed to 5. The number of preceding weeks to look for these data points has been changed to 10.