Physical Datarepresentation in a Multiprocessor Database Machine

A multiprocessor computer architecture for database support

A multiprocessor computer architecture for database support " (1981). Retrospective Theses and Dissertations. Paper 6949. INFORMATION TO USERS This was produced from a copy of a document sent to us for microfilming. While the most advanced technological means to photograph and reproduce this document have been used, the quality is heavily dependent upon the quality of the material submitted. Th...

Locking Granularity in Multiprocessor Database Systems

Locking is a common approach to solve integrity problems that arise from multiple concurrent accesses to a database system. Locking granularity refers to the size of a lockable data unit, called a "granule", in a database system. Fine granularity improves system performance by increasing concurrency level but it also increases lock management overhead. Coarse granularity, on the other hand, sac...

Tuning a Parallel Database Algorithm on a Shared-memory Multiprocessor

Database query processing can benefit significantly from parallelism. Parallel database algorithms combine substantial CPU and I/O activity, memory requirements, and massive data exchange between processes, all of which must he considered to obtain optimal performance. Since parallel external sorting is a very typical example, we have focused on sorting to tune Volcano, a new query processing s...

Modeling of Hierarchical Multiprocessor Database Systems*

The paper is devoted to the issues concerning with modeling and simulating of hierarchical database multiprocessor systems. The requirements for a model of parallel database systems are defined. A new computational model of the hierarchical database multiprocessor architecture is described. This model is called DMM (Database Multiprocessor Model) and designed for OLTP workload. It allows us to ...

Virtualizing a Multiprocessor Machine on a Network of Computers