Abstract
The purpose of the EDG Storage Element (SE) is to provide a uniform Grid interface to mass storage systems. We needed an extensible and flexible architecture, and chose one based on message processing. Not only has this architecture provided a solid framework for meeting changing requirements, it also provides scope for building an extensible and scalable storage management system. While distributed SEs in a Grid are managed by higher level replication services, our request processing model opens possibilities for distributing a single SE across several nodes, allowing further opportunities for optimisation. In this paper, we discuss applications of distributed, transactional processing in mass storage, and its implications for optimisations based on access patterns.
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