Data processin in an en ‘neerin environment, such as a CAD system or a be ographic Y nforma F ion System CGIS). requires a iticantly different database architecture in bufferm and userir%%;i,. 22 that developed for conventional business- A CAD or GIS transaction t ically involves a number of steps

Message-oriented middleware (MOM) is at the core of a vast number of financial services and telco applications, and is gaining increasing traction in other industries, such as manufacturing, transportation, health-care and supply chain management. Novel messaging applications, however, pose some

, ISO/IEC 15938-12 (MPEG Query Format) for the query interface interoperability and ISO/IEC 24800 (JPSearch) for the definition and management of translations between metadata schemas. Finally, we provide insights into an example of a real distributed image search&retrieval system which provides

FD-buffer: a buffer manager for databases on flash disks.

the required type of information while trading off precision for costs. We previously introduced application-specific integrated aggregation (ASIA) as a means for collecting metadata in distributed event-based systems. In this paper, we show how ASIA can support IT Service Management in monitoring

(MMOGs) can include millions of concurrent players spread across the world and interacting with each other within a single session. Faced with high resource demand variability and with misfit resource renting policies, the current industry practice is to over-provision for each game tens of self-owned data centres, making the market entry affordable only for big companies. Focusing on the reduction of entry and operational costs, we investigate a new dynamic resource provisioning method for MMOG operation using external data centres as low-cost resource providers. First, we identify in the various types of player interaction a source of short-term load variability, which complements the long-term load variability due to the size of the player population. Then, we introduce a combined MMOG processor, network, and memory load model that takes into account both the player interaction type and the population

to objects that have migrated. Categories and Subject Descriptors: H.2.4 [Database Management]: Systems: Distributed systems; C.2.4 [Computer-Communication networks]: Distributed Systems --- Distributed databases; D.4.7 [Operating Systems]: Organization and Design --- Distributed systems; E.2 [Data Storage

Abstract Supporting database schema evolution repre-sents a long-standing challenge of practical and theoretical importance for modern information systems. In this paper, we describe techniques and systems for automating the critical tasks of migrating the database and rewriting the legacy

Operational risk assessment of chemical industries by exploiting accident databases

A multidatabase system (MDBS) integrates information from autonomous local databases managed by different database management systems (MDBS) in a distributed environment. A number of challenges are raised for query optimization in such an MDBS. One of the major challenges is that some local