Welcome to JES - if you can see this page, the first steps of installation are complete. Follow the 'installation tests' links on the menu to run diagnostics on the installation
The Astrogrid Job Execution System (JES) is a workflow engine: it executes science worflows which query datasets (DSA) , perform computations (CEA) and load and save results (Myspace).
You might want to install a JES server to execute workflows developed by a local community of users. However, this isn't necessary - any other available jes server could be used.
Of the server-side components of Astrogrid, JES is the most complex - it will or may interact with all other server-side AG components - Registry, Community, Filemanager, FileStore and CEA services.