Elasticsearch 2.0.0-beta1, based on Lucene 5.2.1, has been released for testing, featuring over 2,500 pull requests from 469 contributors, with 850 new additions specific to this version. This beta includes significant updates such as pipeline aggregations, improved store compression, optimized heap usage, structured exceptions, and refined query execution. It also introduces changes aimed at enhancing stability and performance, like atomic transactions and improved type mappings. Core and commercial plugins, such as Shield and Watcher, are synchronized with Elasticsearch's versioning and release schedule. A Migration Plugin has been introduced to aid users in preparing for the transition, by identifying potential issues like incompatible mappings. A known issue exists concerning fields of type IP, which will be addressed in a future update. Testers are encouraged to provide feedback to expedite the general availability release.