Components installed with CMDB Health

  • Release version: Xanadu
  • Updated August 1, 2024
  • 2 minutes to read
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    Summary of Components Installed with CMDB Health

    The CMDB Health tool, part of the com.snc.cmdb plugin, installs various components including tables, properties, and scheduled jobs to help monitor and maintain the health of the Configuration Management Database (CMDB). Access to the Application Files table allows users to view all installed components.

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    Key Features

    • Properties: These define key limits and settings, such as the maximum number of service CIs in the CMDB service dashboard, with a default limit of 10,000.
    • Scheduled Jobs: Scripts that calculate various KPIs for CMDB health, including completeness, compliance, correctness, and relationships.
    • Tables: Key tables include:
      • CMDB Health Metric: Tracks settings for KPIs and metrics.
      • CMDB Health Result: Stores results from the last processing cycle.
      • CMDB Health Scorecard: Maintains current and historical health scores.
      • CMDB Recommended Fields: Lists recommended fields for various classes.
      • CMDB Health Processor Status: Monitors processing progress for each KPI.

    Key Outcomes

    By utilizing the components installed with CMDB Health, ServiceNow customers can effectively monitor and enhance the health of their CMDB, ensuring accurate and up-to-date configuration information. This leads to improved compliance and better overall management of IT services.

    Several types of components are installed with CMDB Health (included in the com.snc.cmdb plugin), such as tables, properties, and scheduled jobs.

    Note:
    The Application Files table lists the components that are installed with this application. For instructions on how to access this table, see Find components installed with an application.

    Properties installed

    Property Description
    glide.cmdb.services_hierarchy_limit Maximum number of service CIs that can appear in the CMDB service dashboard. This limit applies to any child class of the Application Services [cmdb_ci_service_auto] class.

    Scheduled jobs installed

    Scheduled job Description
    CMDB Health Dashboard - Completeness Score Calculation Script for calculating the completeness KPI of CMDB health.
    CMDB Health Dashboard - Compliance Score Calculation Script for calculating the compliance KPI of CMDB health.
    CMDB Health Dashboard - Correctness Score Calculation Script for calculating the correctness KPI of CMDB health.
    CMDB Health Dashboard - Relationship Score Calculation Script for calculating the CI relationships KPI of CMDB health.
    CMDB Health Dashboard - Relationship Compliance Processor Script for calculating compliance of relationships with suggested relationships, and with hosting and containment rules.
    Add Identifier Fields In Recommended Rules Sets all criterion attributes from all active identifier entries from all active identification rules, as recommended fields. These added recommended fields are then checked by the CMDB Health Dashboard - Completeness Score Calculation scheduled job when evaluating the recommended health metric.
    Remove Identifier Fields In Recommended Rules Identifies any recommended field that is a criterion attribute in any active identifier entry in any active identification rule. Then removes the recommended setting for that field.

    Tables installed

    Table Description
    CMDB Health Metric

    [cmdb_health_metric]

    		 Details such as if a KPI or metric is enabled, maximum failure threshold, and other settings for all CMDB Health KPIs and metrics.
    CMDB Health Result

    [cmdb_health_result]

    		 Results from the most recent CMDB Health processing cycle.
    CMDB Health Scorecard

    [cmdb_health_scorecard]

    		 Current and historic health scores. Status of historic score records is 'Historic', and of latest score records is 'Complete’.
    CMDB Health Orphan Rule

    [cmdb_health_orphan_rule]

    		 Rules for calculating orphan records per class.
    CMDB Recommended Fields

    [cmdb_recommended_fields]

    		 Recommended fields per class.
    CMDB Health Metric Status

    [cmdb_health_metric_status]

    		 Internal table that tracks the status of each KPI and metric that is being processed. Includes status, processing time, and processing start date.
    State for a KPI or metric changes from 'In Progress' to either of:
    • Complete
    • MaxFailures
    • Daily Processing Time Out
    Processing of a timed out KPI or metric continues on the following day.
    CMDB Health Processor Status

    [cmdb_health_processor_status]

    		 Internal table that tracks the processing progress of each KPI and metric. Contains a list of tables that are processed for each KPI and metric, and processing status. Classes are processed sequentially, changing status from Draft -> In Progress -> Complete.
    CMDB Relationship All Rules Health Results

    [cmdb_health_result_rel_all]

    		 Stores results about relationship health, to be used by the All Relationships report.