Có 100+ tài liệu thuộc chủ đề "Định thời biểu CPU"
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At an online conference, we convinced him that we needed to discuss and to describe, step by step, every part of the project. We suggested a redesign of the project architecture and defining the requirements set in a parallel. To begin, the customer created a short high level description of the overall system, which was going to be a frame...
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This resulted in the generation of a large number of stories, which created challenges with man- aging and keeping the stories up to date as the project proceeded.. This experience report describes how user stories were utilized as a key component in the development of a strategic roadmap plan for a new system. The stories are written on index cards,...
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Improving the security awareness of the whole project team is ob- viously important.. They always provide the stories that form the metaphor of the development, and answer subsequent questions.. The secu- rity architecture captures the experiences of the similar system developments. The central activity of architectural risk analysis is to build up a consistent view of the target software system...
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The concept of “Agile development” emerged against the backdrop of the changing global environment. In general, changes in the work environment are a kind of stress factor for employ- ees [7]. In particular, moving to agile software development requires a change in the software practitioners' mind set, which in turn might lead to even greater stress. Main changes introduced by...
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Integrated Research in GRID Computing. Marco Danelutto. University of Pisa Italy. Computer Science FB Mathematik und Informatik University of Pisa Inst. GERMANY [email protected] [email protected]. INTEGRATED RESEARCH IN GRID COMPUTING edited by Sergei Gorlatch and Marco Danelutto. Data integration and query reformulation in service-based Grids 1 Carmela Comito and Domenico Talia, Anastasios Gounaris and Rizos Sakellariou. viii INTEGRATED RESEARCH IN GRID...
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GDMS presents heterogeneous, distributed data sources as one logical virtual data source in the form of an OGSA-DAI service. Mappings are specified as path expressions that re- late a specific element or attribute (together with its path) in the source schema to related elements or attributes in the destination schema.. Each source schema in the framework is associated to an...
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In the ASSIST/Grid.it architecture the Grid Abstract Machine (GAM, [2]) is a software level providing the abstractions of security mechanisms, resource discovery, resource selection, (secure) data and code staging and execution. The Grid Execution Agent (GEA, [4]) is the tool to run complex component-based Grid applications, and actually implements part of the GAM. The first command transfers to the execution...
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Combining various parallel components together for accomplishing one task, can be done, e. The behavior of adaptable components can be altered, thus allowing to apply them in use cases for which they have not been originally designed. We demonstrate that both, traditional customization and adaptation of components can be realized in a grid-aware manner (i. e., also in the context...
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Some interesting possibilities appear when exploring object oriented pro- gramming techniques to implement the non functional parts of the native com- ponent. The most straightforward is to replace the parts of the POP- C++ job manager related to object creation and resource discovery with calls to GEẠ. ASSIST relies on the structure of the appli- cation and is performance contract...
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Bringing Skeletons out of the Closet: A Pragmatic Manifesto for Skeletal Parallel Programming. The anatomy of the Grid: Enabling scalable virtual organization. of the 7th Int. In fact, due to the unstable nature of the Grid (nodes that disappear because of network problems, changes in user require- ments/computing power, variations in network bandwidth, etc. In this work we discuss, at...
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For this criterion to be effective, a message should store the identities of the last k nodes visited, where k is the horizon value.. In what follows, we present three variations of the feedback-based algorithm that are based on the grouping criteria used. The groups formed by node A in the graph of Fig. Same as in the Hops criterion...
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corrected data and the at-most-once semantics has been followed in the execu- tion of the SOAP service. This was the synthetic application that has been used in the experiments that will be described herein. The SOAP service was running on a central node (dual-processor) of the cluster and we have use a Tomcat-AXIS server running on top of Linux. As...
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In order to setup an optimal execution environment for a Grid application, knowledge about the status, characteristics and com- position of the various resources is required. In contrast, monitoring of communication resources is at an early stage, mainly due to the complexity of the infrastructure to monitor and of the monitoring activity.. Monitoring the network infrastructure of a Grid has...
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New Grid Monitoring Infrastructures 169 system and in fact needs knowledge about the semantics of the monitored data we have proposed an external module to Mercury called Event Monitor (EM).. We see many real scenarios in which an external client wants to have access to metrics described in the previous section (regardless of their type) and additionally, often due to...
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in defining execution costs of the tasks of the DAG. The idea in both approaches is to start from an assignment which has good performance under one of the two optimization criteria considered (that is, makespan and budget) and swap tasks between machines trying to optimize as much as possible for the other criterion. The rest of the paper is...
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Only if an application is executed for the first time, the user has to give some basic information since no application-specific data is present in the DW.. There is a number of uncertainties in the computation of the cost model. The parameters used in the cost function are those that were measured in a previous execution of the same application....
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Forecasting: In order to calculate a schedule it can be useful to rely on forecasting services to predict the values of the quantities needed to apply a scheduling strategỵ These forecasts can be based on historical records, actual and/or planned values.. Co-allocation: This function is in charge of the mechanisms needed to solve co-allocation scheduling problems, in which strict constraints...
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The GS deployment center is also used to automatically deploy the application in the local and server hosts.. Using the GS deployment center, components of P-GRADE Portal workflows can be published in the Grid for execution as well. Kessel- mann (eds.) The Grid: Blueprint for a New Computing Infrastructure, Morgan Kaufmann,. Proceedings of the Seventh IEEE International Symposium on High...
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thus, benchmarks cannot respond to the changing requirements of devel- oping infrastructures, such as grids;. An extensible framework for generating and submitting synthetic grid work- loads uses applications representative for today's grids, and fosters the addition of future grid applications. Second, applica- tions can be included in generated workloads, even when they are in a debug or test phase. Third,...
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No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of the publisher.. Embedded systems are ubiquitous. This book is composed of 14 chapters that cover embedded and real-time concepts, the MIPS ® processor, all the services...