Specify data refresh rules to determine if a CI is stale for a specific discovery source. Such CIs can then be updated by a lower-priority authorized discovery source.

Before you begin

Role required: itil has read access, itil_admin (on top of itil) has full access.

About this task

Data refresh rules have no impact when dynamic reconciliation rules are in effect.

Data refresh rules are used in conjunction with static reconciliation rules to determine reconciliation steps for a CI. These rules determine if, when, and by which discovery source a CI can be updated.

Procedure

  1. Navigate to All > Configuration > CI Class Manager.
  2. Click Hierarchy to display the CI Classes list.
  3. Select the class for which to create a data refresh rule.
  4. In the class navigation bar, expand Class Info and then click Reconciliation Rules.
  5. In the Data Refresh Rules section, click Add to create a rule or select an existing rule to edit.
  6. Fill out the details in the Create Data Refresh Rules dialog box.
    Field Description
    Discovery source Discovery source for which staleness is evaluated.
    Effective Duration

    The time period that is used for the staleness test.

    If the fields specified in the static reconciliation rule for the CI's class weren't updated by Discovery source within the specified Effective Duration — the CI is determined to be stale for Discovery source and a lower priority discovery source is authorized to update the CI.

    When set to 0 (default), the CI is determined to be stale for Discovery source immediately after an update and therefor, a lower priority discovery source will always be authorized to update the CI.

    If you enter a value with a prefix that is valid and a suffix that is not, such as 15 x — the valid portion of the value is used ('15'). If the entire value is invalid — the default value of 0 is used.

    Active Activates the rule.
  7. Click Save.