GlassFish tracking and usage

GlassFish is an open-source, Java-based application server that provides a platform for developing and deploying Java applications, web services, and enterprise components. It implements the Java Platform, Enterprise Edition (Java EE) standard and is designed for scalability, high performance, and reliability.

GlassFish can run on multiple platforms, including Windows, macOS, Linux, and Solaris. The primary requirements include Java Development Kit (JDK) 8 or later and sufficient memory, disk space, and processing power to support the applications you plan to deploy.

Payara is a downstream fork of GlassFish, meaning it is derived from the GlassFish source code. Payara provides additional tools, features, and production-oriented support not found in the base GlassFish project. While GlassFish focuses on implementing Java EE technologies, Payara aims to be an enhanced application server suitable for mission-critical environments.

Yes, GlassFish supports the creation of multiple instances, known as domains, running on the same server. Each domain runs in its separate JVM, allowing for isolated environments tailored to different application requirements. Be aware that multiple instances can consume additional system resources, such as memory, CPU, and disk space.

Yes, GlassFish is compatible with the Spring Framework, as both are designed for the development and deployment of Java-based applications. You can deploy a Spring application on GlassFish by packaging it as a WAR file and deploying it to the application server. However, keep in mind that Spring and Java EE have some overlap in functionality, and you should consider which framework best suits your project's needs before using them together.