Multiserver Communication in Distributed Database Management System

Communication in the Raid Distributed Database System

This paper identifies the basic functions required from a communication subsystem in order to support a distributed, reliable, reconfigurable, and replicated database processing environment. These functions include: reliable multicast, different types of remote procedure calls, inexpensive datagram services, and efficient local interprocess communication. We report on a series of experiments th...

Disima: a Distributed Image Database Management System

Optimization of Queries in Distributed Database Management System

The query optimizer is widely considered to be the most important component of a database management system. it is a process of producing an optimal (close to optimal) query execution plan which represents an execution strategy for the query. It is responsible for taking a user query and searching through the entire space of equivalent execution plans for a given user query and returning the ex...

Heterogeneity in the Distributed Database Management System SIRIUS-DELTA

In this paper, we first define the characteristics of a heterogeneous DDBMS (section 1). Then we present the heterogeneous DDBMS we are implementing. This prototype relies on the SIRIUS-DELTA homogeneous DDBMS and two local DBMSs : MRDS (running on a very large computer) and PHLOX (a DBMS for micro-computers). The basis of the system is a pivot system concept (section 2). The description of the...

Client Cache Management in a Distributed Object Database Client Cache Management in a Distributed Object Database

A distributed object database stores objects persistently at servers. Applications run on client machines, fetching objects into a client-side cache of objects. If fetching and cache management are done in terms of objects, rather than xed-size units such as pages, three problems must be solved: 1. which objects to prefetch, 2. how to translate, or swizzle, inter-object references when they are...