data replication strategies in wide area distributed systems

... 2nd Intl Workshop on Object-Oriented Database Systems, Lecture Notes in Computer Science 334, Springer, 1988 [11] U Dayal et al The HiPAC Project: Combining Active Databases and Timing Constraints, ... Sun Microsystems, http://java.sun.com/beans/ [24] H Kopetz Sparse Time versus Dense Time in Distributed Real-Time Systems In Proceedings of the 12th Intl Conf on Distributed Computing Systems ... [48], we suggest to think of composite events having a start and endpoint thus associating an interval with the composite event instead of using the timestamp of the terminating event Then we can...

Ngày tải lên: 07/03/2014, 17:20

... processing in a system for distributed databases (SDD-1) ACM Trans Database Syst 6:602–625 Bitton D, DeWitt DJ, Turbyfill C (1983) Benchmarking data base systems: a systematic approach In: Proc 9th Int ... processing strategies 6.3 Bidding in a simple economy We illustrate how the economic paradigm works by running the three-way distributed join query described in the previous section, repeatedly in ... metadata contains information including the name and type of each attribute in the table, the location of each fragment of the table, and an indicator of the staleness of the information Metadata...

Ngày tải lên: 23/03/2014, 12:20

... processing strategies 26 6.3 Bidding in a Simple Economy We illustrate how the economic paradigm works by running the three-way distributed join query described in the previous section repeatedly in ... Allocation in Distributed Computer Systems, ” IEEE Trans on Computers 38, 5, May 1989, pp 705-717 [LITW82] Litwin, W et al., “SIRIUS System for Distributed Data Management,” in Distributed Data Bases, ... Devine, R., Litwin, W and Olson, M., “Mariposa: A New Architecture for Distributed Data, ” Proc 10th Int Conf on Data Engineering, Houston, TX, Feb 1994, pp 54-65 [STON94b] Stonebraker, M., Devine,...

Ngày tải lên: 28/04/2014, 13:38

... beneficial in a read-intensive network, whereas fewer copies are beneficial in a write-intensive network Chapter Introduction Thus, a crucial decision while designing an on-line OMP lies in determining: ... request */ {Service the requests in win(o); /*win(o) is empty after servicing*/ Insert Req into win(o); T Co = τ ; } } } For (Each currently existed request window win(o ) in the system) /* No matter ... research efforts in the computing domain DDBSs evolved as the need for sharing data keeps increasing Further, the rapid proliferation in computer hardware technology coupled with the underlying communication...

Ngày tải lên: 16/09/2015, 17:11

... the following topics WAAS Farm WAAS farm is in the traffic path, intercepting and processing incoming and outgoing traffic Unique features in configuring a WAAS farm include the following: • Load ... Ingress Traffic Wide Area Application Engine Interception Interface Both service 61 and 62 interception is configured on the LAN interface of the router Configuring both interceptions on a single ... Check input access list • Check input access list • Check input rate limits • Check input rate limits • Input accounting • Input accounting • Policy routing • • Routing NAT outside to inside...

Ngày tải lên: 10/12/2013, 16:16

... verification systems are not advanced enough, resulting in false credit information being accepted as genuine This inexorably hurts financially any e-Merchant having accepted fraudulent information ... 16 ADVANCES IN NETWORK AND DISTR SYSTEMS SECURITY INTRODUCTION In an ever-improving technological world, e-commerce is becoming an increasingly popular a tool for communication, business and analysis ... Authentication in E-Commerce 23 CRL, determining chain of trust of used certificates as well as guarantee of an existing standard for processing online transactions Having said all that, most online shoppers...

Ngày tải lên: 25/03/2014, 11:06

... The Information Systems Planning Process Meeting the challenges of information systems planning A L Lederer and V Sethi 216 Evaluating the Outcomes of Information Systems Plans Managing information ... The basic data could then be used for information and control purposes in new kinds of systems The drive for data independence brought about major advances in thinking about systems and in the practical ... Machine: The Future of Work and Power, ButterworthHeinemann, Oxford 1 Developments in the Application of Information Technology in Business Information technology in business: from data processing...

Ngày tải lên: 04/06/2014, 13:19

... The Information Systems Planning Process Meeting the challenges of information systems planning A L Lederer and V Sethi 216 Evaluating the Outcomes of Information Systems Plans Managing information ... The basic data could then be used for information and control purposes in new kinds of systems The drive for data independence brought about major advances in thinking about systems and in the practical ... Machine: The Future of Work and Power, ButterworthHeinemann, Oxford 1 Developments in the Application of Information Technology in Business Information technology in business: from data processing...

Ngày tải lên: 21/06/2014, 03:20

... business unit are developed in this stage Most of these systems rely heavily on gathering and processing external data in addition to internal data But in most instances, there is still a distinct ... development and use of information systems results in many being located within, and supporting, just one functional business area Most of these systems will overlap and are inconsistent in operation and ... organization (moving from mainly financial and accounting systems to wider-ranging operational systems, to management information systems) The focus of the DP organization (moving from a centralized,...

Ngày tải lên: 21/06/2014, 03:20

... kinds of data and to maintain certain business records locally, and the fact that some countries don’t mind data being ‘transmitted in but oppose interactive applications in which data are ‘transmitted ... activities in the industry value chain are performed by the firm’s worldwide systems These systems involve partnerships31 with independent entities that involve information and management process interchange ... place in organizational strategies/ structure during the 1980s because of ever-increasing global competition and growth in the communications and information-processing industry Researchers in international...

Ngày tải lên: 21/06/2014, 03:20

... Aligning IS and corporate goals Instituting cross-functional information systems Organizing and utilizing data Re-engineering business processes through IT Improving the IS human resource Enabling ... #20 Instituting cross-functional information systems Improving the IS human resource Re-engineering business processes through IT Cutting IS costs Creating an information architecture Aligning ... Improving the systems- development process Educating management on IT Organizing and utilizing data Changing technology platforms Integrating systems Using IS for competitive advantage Enabling...

Ngày tải lên: 21/06/2014, 03:20

... computing and systems skills Finding trained personnel and keeping existing information systems people current with the latest advances in IT are vital concerns of information systems managers in ... shortage within the country for those trained in developing business Information Systems Plans in Context: A Global Perspective 167 information systems While many universities and educational institutes ... issues in Information Systems Management: An international comparison, Journal of Management Information Systems, 13(4), Spring, 91–115 7 Approaches to Information Systems Planning Experiences in...

Ngày tải lên: 21/06/2014, 03:20

... Business systems planning Enterprise modelling Information engineering Method Other proprietary (specify) In- house IS strategy In- house business strategy In- house application search techniques Informal ... chapter, think of a possible hybrid approach (keeping in mind time, resource and people constraints) 8 The Information Systems Planning Process Meeting the challenges of information systems planning ... Sons Inc (1977) PRISM Information systems planning in the contemporary environment final report December (1986) Index Systems Inc Cambridge, MA and M R Vitale, B Ives and C M Beath Linking information...

Ngày tải lên: 21/06/2014, 03:20

... institutions in the UK are not directly involved in selecting directors, but they have the power to intervene in a company which they think is poorly managed, not least by calling an extraordinary general ... monitoring and advising They have a third role: decision-making They are in the curious position of participating in major decisions and sitting in judgement on the managers who are carrying them ... spent two days considering strategy at the beginning of each planning cycle so, later in the cycle, they were able to take a more informed view on the individual business strategies The board was...

Ngày tải lên: 21/06/2014, 03:20

... capacity and IS-related infrastructure Its internal information systems, and superior IS skills, including advantages in subsurface information technology and infrastructure processing, were seen as ... trading All of these systems have been introduced by existing or new market-making firms to bring innovation to traditional market processes CALM and AUCNET have been successful since the beginning ... Management Information Systems, 10, (Fall 1993), 37–53 Clarke, R and Jenkins, M The strategic intent of on-line trading systems: a case study in national livestock marketing Journal of Strategic Information...

Ngày tải lên: 21/06/2014, 03:20

... effective in meeting the needs of the remaining customers in the market, providing an opening for competitors with different offerings Finally, creating a network effect requires a large investment ... electronic data interchange, or EDI Many of the most prominent applications of the Internet in the value chain are shown in Figure 13.2 Some involve moving physical activities on-line, while others involve ... eliminates a powerful tool for encouraging purchases, trading off terms and conditions, providing advice and reassurance, and closing deals Delays are involved in navigating sites and finding information...

Ngày tải lên: 21/06/2014, 03:20

... means of linking business and information systems strategy by prioritizing IT investments, setting interlinking performance measures and considering external IT services as well as internally ... Developing and adapting to new systems, procedures, and guidelines Strains on Resource Maximizing the potential of the new technology through integrating information flows and increasing information ... knowledge processes, including constructing, organizing, storing, distributing, and applying Pentland analyses the case of a small engineering consulting company that implemented a new information system...

Ngày tải lên: 21/06/2014, 03:20

... of “information” may have a distracting effect .’ Is information systems history repeating itself over and over again in a continuous cycle of providing more information in greater detail in ... meeting scheduled because needed information is missing On-line management information systems or other query-answering technologies, including expert systems, may be able to provide the information, ... 1984, p.34) (No distinction is made in this definition or in this chapter between data (stimuli and symbols) and information (data conveying meaning as a result of reducing uncertainty).) Characteristics...

Ngày tải lên: 21/06/2014, 03:20

... impacts: integrating customer input into other business areas The changes in the customer support process have also had impacts beyond its own confines in that customer input has been integrated into ... learn by interfering with various knowledge processes As it turns out, in this particular case, EnerSave seems to have maintained a strong engineering base (by diversifying into other areas besides ... our information processing capabilities, thereby increasing understanding, may have the opposite effect by restricting the range of our inquiry and experience, effectively putting us in a kind...

Ngày tải lên: 21/06/2014, 03:20

... institutions in the UK are not directly involved in selecting directors, but they have the power to intervene in a company which they think is poorly managed, not least by calling an extraordinary general ... monitoring and advising They have a third role: decision-making They are in the curious position of participating in major decisions and sitting in judgement on the managers who are carrying them ... spent two days considering strategy at the beginning of each planning cycle so, later in the cycle, they were able to take a more informed view on the individual business strategies The board was...

Ngày tải lên: 21/06/2014, 03:20