Big News! Split is now part of Harness. Learn more at Harness and read why we are excited by this move.

Release

2025-01-07

See all Releases

Targeting

Large segments

Harness Feature Management and Experimentation (FME) now supports “Large segments” (lists of targeting IDs) that can contain more than 100,000 IDs.

Large segments support multiple use cases where bulk targeting of specific IDs is required:

  • Communicating with more than 100,000 specific customers in-app after an incident.
  • Targeting any set of users based on attributes not available within the app at runtime.
  • Performing large-scale A/B tests on specific user bases, exported from external tools.

Effective immediately, Enterprise tier customers may create and use Large segments containing up to one million (1,000,000) IDs. Significantly higher limits are available by request.

Split - 2025-01-07 - 1

Learn more about Large segments and the ways they differ from Standard segments in the documentation:

Note: The initial release of Large segments is focused on client-side SDK usage only. Server-side SDKs do not yet support Large segments, but soon will. Until they are supported, evaluations of feature flags that target Large segments will return control on server-side SDKs.

Admin API Endpoints

After familiarizing yourself with Large segments at the above links, you may find these UI and API equivalent documentation links handy for automating the steps via the Admin API:

Steps for creating and populating a Large segment using either UI or API

  1. Create a Large segment (just metadata, no Environment definition)
  2. Create a definition for a Large segment in an Environment (no user IDs)
  3. Add user IDs to a Large segment (to the definition created in step 2)

Adding an approval step via Admin API

To add an approval step for Large segment creation or update when using the Admin API, reference this example:  Open Change Request to add members to a Large Segment.

Want to Dive Deeper?

We have a lot to explore that can help you understand feature flags. Learn more about benefits, use cases, and real world applications that you can try.

Create Impact With Everything You Build

We’re excited to accompany you on your journey as you build faster, release safer, and launch impactful products.