The future of enterprise groupware applications

This paper provides a review of groupware technology and products. The purpose of this review is to investigate the appropriateness of current groupware technology as the basis for future enterprise systems and evaluate its role in realising, the currently emerging, Virtual Enterprise model for business organisation. It also identifies in which way current technological phenomena will transform groupware technology and will drive the development of the enterprise systems of the future

Transaction Routing for Distributed OLTP Systems: Survey and Recent Results

Workloads in distributed database applications consist of queries and transactions. In order to address performance requirements, distributed transaction processing systems have to deal with two related issues: transaction routing and scheduling. Due to the distribution of data objects among nodes and the access cost incurred by remote accesses, efficient transaction routing is an important consideration for overall system performance. Another important consideration is workflow scheduling and routing. Workflows are complex units of work consisting of multiple, possibly interdependent, transactions. In this survey, we discuss a number of different transaction routing mechanisms and their performance. 1. Introduction In database applications, typical workloads that need processing are database queries and transactions that may be issued in different sites of the distributed system. Database queries may be lengthy and resource consuming and result in read-only accesses to the database. ..

An Analysis of Security Services in Grid Storage Systems

With the wide-spread deployment of Data Grids, storage services are becoming a critical aspect of the Grid infrastructure. Due to the sensitive and critical nature of the data being stored, security issues related with state of the art data storage services need to be studied thoroughly to identify potential vulnerabilities and attack vectors. In this paper, motivated by a typical use-case for Data Grid storage, we apply an extended framework for analyzing and evaluating security from the point of view of the data and metadata, considering the security capabilities provided by both the underlying Grid infrastructure and two commonly deployed Grid storage systems. This analysis leads to the identification of a set of potential security gaps, risks, and even redundant security features found in a typical Data Grid. These results are the starting point for our ongoing research on policies and mechanisms able to provide a fair balance between security and performance for Data Grid Storage Services

EUROSERVER: Energy Efficient Node for European Micro-Servers

EUROSERVER is a collaborative project that aims to dramatically improve data centre energy-efficiency, cost, and software efficiency. It is addressing these important challenges through the coordinated application of several key recent innovations: 64-bit ARM cores, 3D heterogeneous silicon-on-silicon integration, and fully-depleted silicon-on-insulator (FD SOI) process technology, together with new software techniques for efficient resource management, including resource sharing and workload isolation. We are pioneering a system architecture approach that allows specialized silicon devices to be built even for low-volume markets where NRE costs are currently prohibitive. The EUROSERVER device will embed multiple silicon \u27chiplets\u27 on an active silicon interposer. Its system architecture is being driven by requirements from three use cases: data centres and cloud computing, telecom infrastructures, and high-end embedded systems. We will build two fully integrated full-system prototypes, based on a common micro-server board, and targeting embedded servers and enterprise servers

The ExaNeSt Project:Interconnects, Storage, and Packaging for Exascale Systems

ExaNest is one of three European projects that support a ground-breaking computing architecture for exascale-class systems built upon power-efficient 64-bit ARM processors. This group of projects share an 'everything-close' and 'share-anything' paradigm, which trims down the power consumption - by shortening the distance of signals for most data transfers - as well as the cost and footprint area of the installation - by reducing the number of devices needed to meet performance targets. In ExaNeSt, we will design and implement: (i) a physical rack prototype and its liquid-cooling subsystem providing ultra-dense compute packaging, (ii) a storage architecture with distributed (in-node) non-volatile memory (NVM) devices, (iii) a unified, low-latency interconnect, designed to efficiently uphold desired Quality-of-Service guarantees for a mix of storage with inter-processor flows, and (iv) efficient rack-level memory sharing, where each page is cacheable at only a single node . Our target is to test alternative storage and interconnect options on actual hardware, using real-world HPC applications. The ExaNeSt consortium brings together technology, skills, and knowledge across the entire value chain, from computing IP, packaging, and system deployment, all the way up to operating systems, storage, HPC, big data frameworks, and cutting-edge applications