This chapter briefly explains the purpose and the scope of this document, its place in the GraphDB user documentation set, and provides some suggestions for efficient use. It starts with an introduction on the differences between the two editions of GraphDB, which facilitates the understanding of the GraphDB product family, the design objectives behind each of the versions, and the rationale behind the structuring of the documentation.
GraphDB-Lite and GraphDB-SE are identical in terms of usage and integration. Apart from a few differences in configuration parameters, these editions have the same functionality and implement the same Sesame APIs. However, they use different indexing, inference and query evaluation implementations, which result in different performance, memory requirements, and scalability.
GraphDB-Lite is designed for medium data volumes (below 100 million statements) and for prototyping. Its key characteristics are as follows:
GraphDB-SE is suitable for handling massive volumes of data and very intensive querying activities. It is designed as an enterprise-grade database management system. This has been made possible through:
GraphDB-Enterprise is a component that can manage and synchronise multiple GraphDB instances in a resilient and scalable cluster configuration.
Further discussion on the differences between GraphDB's editions can be found in the GraphDB Primer.
This document is designed for software engineers, system integrators and system administrators who wish to integrate the GraphDB-Lite semantic repository in to their applications or who wish to use GraphDB-Lite and Sesame as a stand-alone server for storing and processing structured data. It is also useful for system administrators who need to support and maintain a GraphDB-Lite repository.
The reader is assumed to be familiar with databases, but not an expert in semantic database systems, semantic information retrieval, Semantic Web, or GraphDB itself. Less experienced readers are recommended to read the GraphDB Primer where the required minimum of Semantic Web and related concepts is covered, as well as GraphDB basics.
Readers new to GraphDB should read the GraphDB Primer first and then this document in its entirety. This will guarantee that the necessary basic information has been covered in sufficient depth. After some experience using GraphDB, this guide can be used as a reference for carrying out specific tasks.
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