Munenori Kai

Authors designed and evaluated Distributed Large Memory System: DLM, which gives us very large virtual memory beyond the size of local memory by using remote memory distributed over cluster nodes. Originally, the DLM only supports a function for dynamic memory allocation, but it is required to be equipped with a memory release function for the applications that reuse memory resources in their runtime. We incorporate a simple memory management mechanism into the DLM to support memory release function for efficient memory utilization. In this report, we describe the design and mechanism of the memory management and show an initial performance evaluation for a red-black tree as a micro benchmark and a cluster 3, a real bioinformatics application.

Programming lessons in universities start in a language widely used in practice, such as Java, of which richness in syntax and semantics tends to be rather an obstacle for students to learn and enjoy programming. We developed a programming language Nigari and its supporting system to present students an environment where they learn OOP fundamentals by writing attractive examples to be visualized on the screen from the beginning. Nigari is designed to lead to writing programs in Java. We report on our class experiment of applying Nigari and its system at the CS department in Waseda University.