Query storage

You can retrieve configuration information regarding the directories in which a selected AVEVA Historian is storing history files. The different storage types are circular, alternate, buffer, and permanent.

To retrieve storage information

1. In the Query Type list in the toolbar, click Storage.

2. In the Columns pane, click the Storage tab.

3. Select the columns to show in the results:

   • Path: The path to the storage location. The circular storage location must be a local drive on the server machine, and the path must be specified using normal drive letter notation (for example, c:\Historian\Data\Circular). The alternate, buffer, and permanent storage locations can be anywhere on the network, provided that the AVEVA Historian service user has full access to those network locations.

   • Maximum storage size: The limit, in megabytes, for the amount of data that will be stored to the specified location. The maximum size applies to circular and alternate storage only. If the maximum size is set to 0, all available space at the storage location will be used.

   • Minimum storage size threshold: The minimum amount of disk space, in megabytes, at which the system will attempt to start freeing up space. The threshold applies to circular and alternate storage only. Typically, the minimum threshold should be the size of the average history block (before any compression) multiplied by 1.5.

4. In the and computer list, click the name of the computer on which the storage node resides.

5. To view the results, click the Data tab in the Results pane.

   Note that the Storage Type column always appears.