Project Shoal is the GMS (Group Management System) technology behind the GlassFish 2.x and Sailfin clustering features but it is also a standalone project which has just shipped version 1.1 (announcement).

New features include new health state and client notifications, diagnostics, failure detection and scalability enhancements, as well as an experimental cross subnet support. The list of fixed bugs is pretty long (thanks to the GlassFish and Sailfin teams and to everyone filing issues).

Code (binary and source) and documentation are all available today. Check out Shreedhar's post on this release.

This shoal 1.1 release is already integrated in the upcoming GlassFish v2.1.1 and Sailfin v2 products (both will ship simultaneously). Check out related blog posts tagged with shoal.