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Distributed information sys

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Meena Chauhan
Meena Chauhan

DIS, distributed information system development itsresearch

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By : Ms.Meena Chauhan, M.Tech CSE Sr.A.P.,ABES Engg College,Ghaziabad Distributed Information Systems
Distributed Information Systems Distributed Information System (DIS) is seen as a collection of autonomous in­formation systems which can collaborate with each other. This collaboration can be driven by requests for knowledge needed to predict what values should replace null values in missing or incomplete attributes.
Distributed Information Systems Distributed information system is a system that connects a number of information systems using network communication technology. It is assumed that DIS is autonomous and incomplete .
[object Object],[object Object],[object Object],[object Object]
DISD Distributed Information Systems Development (DISD) promotes realisation of IS in a collaborative way where several partners, generally situated in distant places, participate in the elaboration of a common solution. The DISD consists in decomposing, the IS development process into more or les autonomous phases to be realised by these partners.
DISD aims at increasing enterprise productivity, reducing IS development cost, and enlarging the number of human competencies and skills, which allows not only to share experiences in different cultural environments but also to extend enterprise strategy to the global market. In fact, this kind of practice allows enterprises to deal with new economic globalisation constraints that they have to undergo but it is not devoid of problems. It is clear that the distribution of processes has an impact on the way the IS products will be specified, designed, coded and delivered to the clients.
Design and related Aspects
Layers of an IS Example <html> ... </html> browser
Presentation Layer ,[object Object]
Application Logic Layer ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Resource Management Layer ,[object Object],[object Object],[object Object]
Designs of IS ,[object Object],[object Object]
top-down design ,[object Object],[object Object],[object Object]
top-down [example]
top-down design ,[object Object],[object Object],[object Object],[object Object],[object Object]
advantages & disadvantages ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
bottom-up design ,[object Object]
bottom-up design ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Architecture of an Information System - 4 types: ,[object Object]
1 – tier Architectures ,[object Object],[object Object],[object Object],[object Object]
Design of 1 – tier Architecture ,[object Object]
1 – tier Architecture ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
2 - tier Architectures ,[object Object]
2 - tier Architectures ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
advantages & disadvantages ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
3 - tier Architectures ,[object Object]
3 - tier Architectures ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
3 - tier ,[object Object]
advantages & disadvantages ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],n -tier
n -tier ,[object Object]
n - tier ,[object Object]
advantages & disadvantages ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
gains and losses ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
communication in an IS between distributed layers/tiers ,[object Object],[object Object]
synchronous interactions (blocking) ,[object Object]
asynchronous interactions (non blocking) ,[object Object]
scaling multi tier systems ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
what do scaling techniques improve?
use faster machine ,[object Object],[object Object]
create cluster of machines ,[object Object],[object Object]
use special machines ,[object Object],[object Object]
segment the workload ,[object Object],[object Object]
batch requests ,[object Object],[object Object]
aggregate user data ,[object Object],[object Object]
manage connections ,[object Object],[object Object]
cache ,[object Object],[object Object]
summary ,[object Object],[object Object],[object Object],[object Object]

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Distributed information sys

  • 1. By : Ms.Meena Chauhan, M.Tech CSE Sr.A.P.,ABES Engg College,Ghaziabad Distributed Information Systems
  • 2. Distributed Information Systems Distributed Information System (DIS) is seen as a collection of autonomous in­formation systems which can collaborate with each other. This collaboration can be driven by requests for knowledge needed to predict what values should replace null values in missing or incomplete attributes.
  • 3. Distributed Information Systems Distributed information system is a system that connects a number of information systems using network communication technology. It is assumed that DIS is autonomous and incomplete .
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  • 5. DISD Distributed Information Systems Development (DISD) promotes realisation of IS in a collaborative way where several partners, generally situated in distant places, participate in the elaboration of a common solution. The DISD consists in decomposing, the IS development process into more or les autonomous phases to be realised by these partners.
  • 6. DISD aims at increasing enterprise productivity, reducing IS development cost, and enlarging the number of human competencies and skills, which allows not only to share experiences in different cultural environments but also to extend enterprise strategy to the global market. In fact, this kind of practice allows enterprises to deal with new economic globalisation constraints that they have to undergo but it is not devoid of problems. It is clear that the distribution of processes has an impact on the way the IS products will be specified, designed, coded and delivered to the clients.
  • 8. Layers of an IS Example <html> ... </html> browser
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