Abstract: Systems and methods for centralized configuration of a distributed computing cluster are disclosed. One embodiment of the disclosed technology provides a user environment that facilitates a selection of a service to be run on hosts in the distributed computing cluster and configuration of the service or hosts in the distributed computer cluster. The disclosed technology can further configure each of the hosts in the distributed computing cluster to run the service based on a set of configuration settings.

Abstract: Systems and methods for centralized configuration of a distributed computing cluster are disclosed. One embodiment of the disclosed technology provides a user environment that facilitates a selection of a service to be run on hosts in the distributed computing cluster and configuration of the service or hosts in the distributed computer cluster. The disclosed technology can further configure each of the hosts in the distributed computing cluster to run the service based on a set of configuration settings.

Abstract: A system and method are provided to allow demand loading and discarding of Java executable image (JXE) files. The virtual machine allocates an address space for a requested JXE program. The read-only portion of the JXE file is memory mapped from its nonvolatile location to the allocated memory space using read-only mapping and the read/write section of the JXE file are loaded into memory. When a page of the JXE program is needed, a page fault occurs if the read-only portion has not been loaded into memory. The operating system's page fault handler retrieves the needed page(s) from the nonvolatile storage location based upon the mapping data that resulted from the previously performed memory mapping. Because the read-only section of the JXE file is memory mapped using read-only mapping, the operating system's paging process is free to discard previously loaded memory pages that contain read-only portions of the JXE file.