Properties related to remediation of duplicate CIs

  • Release version: Australia
  • Updated March 12, 2026
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    Summary of Properties Related to Remediation of Duplicate CIs

    This document outlines the configuration properties for managing duplicate Configuration Items (CIs) using the Duplicate CI Remediator and the De-duplication Dashboard within CMDB Workspace and Service Graph Workspace. Access to these properties requires the sncmdbadmin or admin role.

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    Key Features

    • Max Field Length: Excludes attributes exceeding a defined length (default 4000) from certain actions in the Duplicate CI Remediator.
    • Related Items Blacklist: Lists tables and columns that are excluded from merging during remediation. Default includes several CI-related tables.
    • Max Duplicate CIs: Sets a threshold (default 1000) for the number of duplicate CIs to process, with a hard limit of 5000.
    • Dry Run Option: Allows testing the remediation process without actual updates by setting the property to true.
    • Restricted Mode: Enables a restricted mode to allow remediation to proceed even when related items are blocked.
    • Enhanced Merging: Ignores database errors and skips business rules during remediation to ensure successful updates.

    Key Outcomes

    By configuring these properties, ServiceNow customers can effectively manage and remediate duplicate CIs, ensuring cleaner data in the CMDB and improving operational efficiency. Customers should carefully adjust these settings to balance performance and functionality based on their specific use cases.

    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 sn_cmdb_admin or admin role is required.

    Although the properties below reference the Duplicate CI Remediator, these properties have an equivalent effect in CI de-duplication experience in CMDB Workspace and in Service Graph 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.
    glide.duplicate_ci_remediator.merge_related_items_enhanced Enables the capability to ignore database errors and/or skip ALL business rules (disable workflow) in related tables referencing CIs, during duplicate CI remediation. In such related tables, automated workflows such as business rules might prevent the update of the referenced CI to the main CI, causing de-duplication tasks to fail. In these situations, blocking business rules and other automated workflows, and ignoring errors allows remediation to complete.