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Search Engine Cluster Testing and Deployment

1 post · Nov 2025 – Aug 2026

What this trail covers

Glean's search engine cluster testing and deployment processes have been significantly enhanced to improve speed, reliability, and safety. This includes developing a fast, in-memory multi-node search engine for local unit testing, enabling engineers to catch bugs earlier in the development cycle. Deployment operations have been overhauled for faster and safer rebuilds, with added unit tests for all operations, verification procedures for sensitive steps like cluster switchovers, and a fast rollback operation.

All Glean trails
  1. Testing and deploying our search engine clusterThis post details the development of a fast, in-memory multi-node search engine for local unit tests, enabling engineers to catch bugs earlier. It also describes an overhaul of deployment operations, including revamped setup/teardown for faster and safer rebuilds, added unit tests for all deployment operations, verification procedures for sensitive steps like cluster switchovers, and a fast rollback operation.
  2. 2025 search tool benchmark: key metrics to evaluate accuracy and speedThis post introduces a benchmark for evaluating enterprise search tools, focusing on accuracy, speed, user experience, and cost. It details key metrics for each category, including tool calling accuracy, context retention, response times, and update frequency. The post also compares Glean with other leading search tools and discusses pricing and feature sets in relation to business needs.