Create Archives Automatically

About this task

Historian can automatically create archives for you if the current archive reaches a specific size or after a specific duration. This topic describes how to set these options. You can, however, choose to create archives manually.

Procedure

  1. Access Configuration Hub.
  2. In the NAVIGATION section, under the Configuration Hub plugin for Historian, select Archives.
    The Data Stores section appears.
  3. Select the data store in which you want to create archives automatically.
    The DETAILS section displays the details of the data store.
  4. Under Archive Creation, enter values as described in the following table.
    Field Description
    Automatically Create Archives Switch the toggle on to indicate that you want Historian to create archive files automatically when the current one is full.
    Create Archive By Select whether you want to create a new archive automatically after the current one reaches a specific size or after a specific duration. This field is enabled only if you switch the Automatically Create Archives toggle on.
    Select one of the following options:
    • Size: Select this option if you want to create a new archive when the current one reaches a specific size. Specify the size in the Default Size (MB) field (which appears only if you select Size).
    • Days or Hours: Select one of these options if you want to create a new archive after a specific duration. Specify the duration in the Archive Duration field (which appears only if you select Days or Hours).
    Default Size (MB) The default size of an archive after which a new one will be automatically created. This field appears only if you select Size in the Create Archive By field.
    Archive Duration The duration after which a new archive will be automatically created. This field appears only if you select Days or Hours in the Create Archive By field.
    If needed, you can switch the Overwrite Old Archives toggle on. If you enable this option, the oldest archived data is replaced with the latest one when the latest archive default size is reached. Since this action deletes historical data, exercise caution in using this feature. Be sure that you have a backup of the archive so that you can restore it later. Best practice is to create an additional archive to prevent premature loss of data due to overwriting. For example, if you want to save 12 months of data into 12 archives, create 13 archives.
  5. In the upper-left corner of the page, select Save.
    Archives will now be created automatically based on the criteria you specified.