PK

Pawan Kartik

Software Engineer II

Author's articles

How cross-project search (CPS) works in Elasticsearch Serverless
Elastic Cloud ServerlessInside Elastic

April 30, 2026

How cross-project search (CPS) works in Elasticsearch Serverless

Elastic Cloud Serverless cross-project search (CPS) treats index expressions as cross-project by default. This post explains how TransportSearchAction scopes projects, resolves index expressions, skips projects with no matches, and validates index resolution against allow_no_indices and ignore_unavailable.

MPPK
By: Matteo Piergiovanni and Pawan Kartik

Ready to build state of the art search experiences?

Sufficiently advanced search isn’t achieved with the efforts of one. Elasticsearch is powered by data scientists, ML ops, engineers, and many more who are just as passionate about search as you are. Let’s connect and work together to build the magical search experience that will get you the results you want.

Try it yourself