Convert a service instance to Lightweight Service Model

---
title: Convert a service instance to Lightweight Service Model
description: Convert a Service Mapping service instance to Lightweight to minimize storage footprint and optimize performance.
locale: en-US
canonical_url: https://www.servicenow.com/docs/r/australia/it-operations-management/service-mapping/convert-service-instance-lightweight.html
release: australia
product: Service Mapping
classification: service-mapping
topic_type: task
last_updated: "2026-09-10"
reading_time_minutes: 1
keywords: [service mapping, lightweight service, convert service, service architecture]
breadcrumb: [Configuring Service Mapping, Service Mapping, ITOM Visibility, IT Operations Management]
---

# Convert a service instance to Lightweight Service Model

Convert a Service Mapping service instance to Lightweight to minimize storage footprint and optimize performance.

## Before you begin

-   Verify that the Service Mapping Plus store app is up to date.
-   Verify that your instance release supports the Lightweight Service Model.
-   Verify that the Domain Separation plugin isn't active on your instance. The **Convert to Lightweight** link isn't available when the plugin is active.
-   Verify that the service is a Tag-Based or Dynamic service.
-   Verify that the service isn't already Lightweight and that no conversion is pending for it.

Role required: service\_mapping\_admin

## About this task

When you convert a service instance to Lightweight, the system deletes the existing historical snapshot data and reconfigures the service to operate under the Lightweight architecture. The service continues to calculate membership automatically, but only current state data is retained going forward. The history timeline is also removed, so you can't view past service topology states for the service.

**Note:** Converting a service instance to Lightweight is permanent and irreversible.

Dynamic and Tag-based service instances are currently supported for conversion to Lightweight.

For detailed information on the Lightweight Service Model, see [Service Mapping Lightweight Service Model](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/it-operations-management/service-mapping/sm-lightweight-service-model.md).

## Procedure

1.  In the navigation filter, enter: `cmdb_ci_service_calculated_list.do`.

2.  In the **Calculated Application Services** list, select a service instance of type Dynamic or Tag-Based.

3.  In the **Related Links** section of the service record, select **Convert to Lightweight**.

4.  In the confirmation dialog, review the warning about deleting historical data.

    1.  To preserve historical snapshots, select **Cancel** and complete any required analysis first.

    2.  If you're ready to proceed, select **Convert**.

    A notification appears: "Converting service to Lightweight. This may take a few minutes." Keep the page open during the conversion process. Don't navigate away or close the page until the conversion is complete.


## Result

The service operates under the Lightweight Service Model.