Properties related to remediation of duplicate CIs

  • Release version: Zurich
  • Updated July 31, 2025
  • 2 minutes to read
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    Summary of Properties Related to Remediation of Duplicate CIs

    This document details properties that allow ServiceNow customers to configure the remediation process for duplicate Configuration Items (CIs) using the Duplicate CI Remediator and the De-duplication dashboard within CMDB Workspace and Service Graph Workspace. Admin role access is required for viewing and editing these properties.

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    Key Features

    • Max Field Length: Limits attributes with a maxlength exceeding this value (default: 4000) from appearing in specific tabs of the Duplicate CI Remediator.
    • Related Items Blacklist: A comma-separated list of tables excluded from merging during duplicate CI remediation, ensuring certain data remains untouched.
    • Max CIs Threshold: Sets a limit on the number of duplicate CIs (default: 1000) that can be processed, affecting reconciliation support. This threshold cannot exceed 5000.
    • Dry Run Option: Allows testing of the remediation process without actually updating records in the CMDB. If set to true, work notes will outline potential changes.
    • Restricted Mode: Enables a mode that limits the use of related items during remediation, allowing for a blocked remediation to proceed under specific conditions.

    Key Outcomes

    By utilizing these properties, ServiceNow customers can effectively manage duplicate CIs, improve system performance, and ensure that remediation processes align with organizational standards. Customers can test configurations safely and control how merging of data occurs, ultimately enhancing data integrity within the CMDB.

    Use de-duplication properties to configure how remediation of duplicate CIs works when using the Duplicate CI Remediator or the De-duplication dashboard in CMDB Workspace and in Service Graph Workspace.

    To view and edit these properties, the admin role is required.

    Although the properties below reference the Duplicate CI Remediator, these properties have an equivalent effect in duplicate CI remediation in CMDB Workspace.

    Property Description

    Attributes in which max_length exceeds this property value (4000 by default) are excluded from the Select Main CI, Merge Attribute Values, and Determine Duplicate CI Actions tabs in the Duplicate CI Remediator wizard.

    glide.duplicate_ci_remediator.max.field_length

    		 If the max_length for an attribute is equal to the property value, and the size of the data exceeds the property value, then the data is truncated to the property value and the attribute appears in attribute lists.
    • Type: integer
    • Default value: 4000
    • Location: Configuration > CMDB Properties > Duplicate CI Remediator Properties
    Note:
    This property impacts the performance of de-duplication tasks, therefore be cautious about setting this value.

    Comma separated list of related tables in the format '<table>.<reference column>', that are excluded from merging during duplicate CI remediation.

    glide.duplicate_ci_remediator.related_items_blacklist
    • Type: string
    • Default value: cert_task.cmdb_ci,cert_audit_result.configuration_item,discovery_log.cmdb_ci,alm_hardware.ci,alm_asset.ci,fm_expense_line.ci
    • Location: Configuration > CMDB Properties > Duplicate CI Remediator Properties

    Threshold for the number of duplicate CIs, which if exceeded, support for reconciliation in the Duplicate CI Remediator is limited (1,000 by default).

    glide.duplicate_ci_remediator.max.cis
    • Type: integer
    • Default value: 1000
    • Location: Configuration > CMDB Properties > Duplicate CI Remediator Properties
    • Learn more: See 'Large number of duplicate CIs' in Remediate a de-duplication task (manual).
    This threshold never exceeds 5,000, even if you set the property to a value greater than 5,000.

    Determines whether the Duplicate CI Remediator actually remediates CI duplication by updating records in the CMDB, or not.

    glide.duplicate_ci_remediator.dry_run

    When set to false (default value), updates specified in the wizard are actually performed.

    You can set this property to true and then test run through the Duplicate CI Remediator without any records actually being updated. In this case, the work notes for the task describe the changes that will happen in an actual remediation.

    • Type: true | false
    • Default value: false
    • Location: Configuration > CMDB Properties > Duplicate CI Remediator Properties
    glide.duplicate_ci_remediator.enable_restricted_mode

    Enables restricted mode remediation in the Duplicate CI Remediator. This option restricts the use of related items in de-duplication remediation and allows a blocked remediation to proceed using the Use the Duplicate CI Remediator (Restricted Mode) option. For more information, see Using restricted mode within the Duplicate CI Remediator [KB1542272].

    Set to true to enable restricted mode remediation.