Finding performance bottlenecks can be a difficult task and it can get even more difficult as our applications grow in size. The Box is a methodology tool that focuses us efforts to improve performance.If you want to be consistent and predictable, getting rid of the guessing is a must.
OpenTerracotta is an open source enterprise-class JVM clustering solution that can take multi-threaded single-JVM apps and have them run across multiple JVMs with no code changes. Orion Letizi goes super-indepth on Terracotta and how it works, explaining how to do session replication, distributed caching, master/worker, and more.
The two most popular managed environments (the JVM and the CLR) are in fact, nothing more than a set of shared libraries, each providing services to executing code such as memory management, thread management, code compilation (JIT), etc. Using both the JVM and the CLR inside the same operating system process is easy, since any process is capable of loading just about any shared library.