Consider a scenario where a disruption arises within a specific department’s network, impacting all workstations. Here, an IT administrator might encounter considerable hurdles if the organization maintains its device inventory in an Excel spreadsheet. Identifying the responsible routers and servers manually becomes an arduous task, particularly if the document lacks comprehensive details. Consequently, the team’s recourse might be reaching out to a third-party vendor for aid, resulting in delayed recovery.

Contrastingly, the scenario transforms when the administrator possesses access to a CMDB (Configuration Management Database). This repository enables swift pinpointing of the devices implicated in the disruption, proving its worth to IT professionals. Though the setup and upkeep of a CMDB demand effort, the benefits it yields, such as hastened incident resolution and invaluable insights for well-informed IT choices, validate the investment’s significance and rewards.

What is CMDB?

What precisely entails CMDB? In basic language, CMDB stands as a framework that interfaces and harmonizes with your possessions, providing a comprehensive panorama of the IT framework and arrangement particulars. This empowers enterprises to capably oversee and augment IT service provisioning since all software and hardware data is meticulously archived and structured. Within an updated CMDB, your staff can effortlessly access particulars and chronicles, encompassing servers, applications, routers, laptops, and desktops.

Configuration Items

Configuration Management governs your CMDB within ServiceNow—an application. It acts as a consolidated repository housing details, termed Configuration Items (CI), related to diverse device categories within your enterprise, managed through tables. A Configuration Item embodies:

Consider designating a requisition service, an instance being a Unix server, with a correlated configuration item entry, namely “Unix Server CI.” Within this entry, you can delineate traits and setups affiliated with the server.


Attributes constitute the data elements associated with a Configuration Item. These furnish supplementary insights into the CI, encompassing particulars like designation, maker, site, and serial number. Stored as columns within the CMDB tables, they extend comprehensive contextual information.

For a “Unix Server CI,” its attribute columns encompass particulars such as title, fabricator, OS, corporation, model, identification, and memory. For a more intricate perspective, the provided image can be consulted.

CI Relationships

In the CMDB framework, a Configuration Item (CI) can form connections with another CI, showcasing the interlinkage of records. This relational data is subsequently captured and archived in a distinct table, affording the opportunity to visualize the linkage between parent and offspring CIs.

The “Related Items” section of a CI record form displays all the associated configuration items linked to the item. It also reveals the specific type of relationship they have, including but not limited to: 

For example, if an application is running on a Windows server, the CI record of the application will have a “runs on” relationship with the CI record of the Windows server. 


Beyond relationships, Configuration Items are also sorted into distinct Classes. Every class aligns with a dedicated table in the CMDB and hosts CI entries for gadgets or systems belonging to the same grouping. Fundamentally, a class epitomizes a collection of CIs united by shared characteristics.

Consider this illustration: laptops, applications, and servers possess unique attributes that set them apart from one another. This distinctiveness warrants their classification into separate classes, denoted as “Computer,” “Application,” and “Server.”

Every class table will hold attributes specific to its respective class, complemented by certain default CMDB fields. Moreover, a “Class” field resides in CMDB tables, responsible for storing values signifying the variety of classes within the CMDB.

CMDB Data Schema Model

A CMDB Data Schema Model encompasses a series of connected tables that contain all assets and business services controlled by an organization. The model can be presented on a map, showcasing all connections among different CMDB records. 

The realm of CMDB is expansive, encompassing various facets that can’t be fully covered in a single discourse. Yet, fret not, for our upcoming blogs will delve into advanced concepts, ensuring your grasp of CMDB becomes comprehensive. Be poised for an enlightening journey as we navigate the intricacies of CMDB together!

Crafting a mature CMDB isn’t devoid of challenges, yet with Unifii, an independent ServiceNow partner, your objectives can find guidance. Our adept consultants possess diverse industry experience, offering insights attuned to your unique requirements. Irrespective of your point along the CMDB trajectory, reach out to us for a bespoke strategic blueprint, optimizing your IT service delivery.