A Study on a Multi-Layred Persistent Programming Language for an Integrated Programming Environment

点击翻译按钮获取中文摘要

We researched and developed the new persistent programming language system for distributed and parallel programming of database applications and other applications. Our system is composed of three layrs : WAKASHI,INADA,and BURI.WAKASHI is a persistent distributed shared memory server. WAKASHI provides not only memory coherence but also the transaction functions : concurrency control and recovery. Previous distributed shared memory servers are focused on parallel computation. In contrast, WAKASHI focuses on both of parallel computation and database applications.WAKASHI was developed on SUN Workstations and 32 bit UNIX at the first time. As the personal computers, and 64 bit UNIX become popular, WAKASHI for multi-platforms become important. We learned that it is difficult to change the programs for UNIX to the one for Windows-NT.Finally, WAKASHI works on three different environments : 32 bit UNIX,64 bit UNIX,and Windows-NT.INADA is an implementation of the C++ based object definition language decided by the object database standard : ODMG-93. INADA has two main its own mechanisms : large object mechanism, and multitype object mechanism. Multimedia files including HTML files, and MPEG files become INADA objects directly and easily using large object mechanism. It means that data storage of multimedia database can be done by large object mechanism. Multimedia object mechanism is for users' adding or deleting new types for INADA objects.Method migration mechanism implemented in INADA is a basic mechanism for distribute and parallel processing of OQL,which is supported in BURI layr. We proposed a new way to distribute and parallel processing of OQL using method migration mechanism by INADA,and distributed shared memory by WAKASHI.