ftp://ftp.cs.sandia.gov/pub/sunmos/ SUNMOS <abstract> SUNMOS (Sandia/UNM Operating System) is a joint project between Sandia National Laboratories and the Computer Science Department at the University of New Mexico. The goal of the SUNMOS project is to develop a highly portable, yet efficient, operating system for massively parallel distributed memory systems. Where we have to chose between performance and added functionality, the decision usually favors performance. Most of SUNMOS is concerned with reliable and fast message passing. SUNMOS is a single-tasking kernel. SUNMOS does not provide demand paging. Once a SUNMOS application is loaded and running, it can manage practically all of the available memory on a node and use the full resources provided by the hardware. SUNMOS is intended to take over the compute nodes of a system. Applications are started and controlled from a host node process called yod. The yod program runs on a SUN frontend for the nCUBE 2, and on a service node on the Intel Paragon. <contact>sunmos-dev@cs.sandia.gov <contact>Stephen R. Wheat / srwheat@cs.sandia.gov <environment> The project was initiated in January 1991. The first step was to develop an operating system that was compatible with Vertex, the vendor supplied operating system for the nCUBE-2. In Spring 1993 we decided to port SUNMOS to the Intel Paragon. It took only three month to do so, attributing to the portability of SUNMOS. <keywords>parallel operating system; message passing; massively parallel multiprocessor <category>ppt-comm </urc>