The design and implementation of Grid database services in OGSA‐DAI

Abstract

SUMMARYInitially, Grid technologies were principally associated with supercomputer centres and large-scale scientific applications in physics and astronomy. They are now increasingly seen as being relevant to many areas of e-Science and e-Business. The emergence of the Open Grid Services Architecture (OGSA), to complement the ongoing activity on Web Services standards, promises to provide a service-based platform that can meet the needs of both business and scientific applications. Early Grid applications focused principally on the storage, replication and movement of file-based data. Now the need for the full integration of database technologies with Grid middleware is widely recognized. Not only do many Grid applications already use databases for managing metadata, but increasingly many are associated with large databases of domain-specific information (e.g. biological or astronomical data). This paper describes the design and implementation of OGSA-DAI, a service-based architecture for database access over the Grid. The approach involves the design of Grid Data Services that allow consumers to discover the properties of structured data stores and to access their contents. The initial focus has been on support for access to Relational and XML data, but the overall architecture has been designed to be extensible to accommodate different storage paradigms. The paper describes and motivates the design decisions that have been taken, and illustrates how the approach supports a range of application scenarios. The OGSA-DAI software is freely available from http://www.ogsadai.org.uk.

Grid-Enabled Workflows for Industrial Product Design

“…The first stage of the optimization process for calculating and storing the DoE is based on the design parameters read from the OGSA-DAI design database [11]. The inputs to the DOE calculation are: The choice of DOE algorithm, the number of design points required, the upper and lower bounds of the parameters, and a "current best set" of parameters (optional).…”

A service-oriented system for distributed data querying and integration on Grids

“…The version of OGSA-DQP used in our prototype builds upon the Globus Toolkit 4 WSRF infrastructure [31] and on top of the WSRF 2.2 OGSA-DAI release [3].…”

“…This fact has led to the production of vendor systems, such as Oracle11g and IBM DB2. At the level of Grid middleware infrastructure, two notable (and correlated) examples are the OGSA Data Access and Integration (OGSA-DAI) [3] and the OGSA Distributed Query Processor (OGSA-DQP) 1 [4][5][6] projects. These projects have moved toward a serviceoriented architecture quite early in their lifecycle.…”

Enhancing Workflow with a Semantic Description of Scientific Intent

“…This service is based on the existing OGSA-DAI ( [32]) middleware for distributed data management with extended semantic capabilities;…”