1 / 21

Massively Distributed Database Systems

Massively Distributed Database Systems. Spring 2014 Ki- Joune Li http://isel.cs.pusan.ac.kr/~lik Pusan National University. An assignment. Choose an electronic (or electric) device

nicole
Download Presentation

Massively Distributed Database Systems

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Massively Distributed Database Systems Spring 2014 Ki-Joune Li http://isel.cs.pusan.ac.kr/~lik Pusan National University

  2. An assignment • Choose an electronic (or electric) device • Define additional functions with . data storage . communication (infrastructure or ad-hoc) . some computation . and others Do not mind how difficult it would be to implement. • Example

  3. Massively Distributed Databases vs. Distributed Databases

  4. This lecture includes • Distributed Systems and Database Systems • Overview • Synchronization • Consistency and Replications • P2P • Ad-Hoc Network and MANET • Data on Air • Cloud • RESTful • Ubiquitous Computing and IoT

  5. Definition of a Distributed System • Distributed system : 1) A collection of (scalability) 2) independent computers that (heterogeneity) 3) appears to its users as a single coherent system(transparency) • Distributed System versus Parallel System • Separated Operating System vs. Single Operating System • Message Passing vs. Shared Memory

  6. Distributed Systems andDistributed Database Systems - Overview

  7. Why Distributed System ? • Performance • Incremental Growth (Scalability) • 1 single mainframe of price W • N small machines of price W/N • Fault Tolerance • 1 single mainframe : critical weak point • Failure of a machine : replacement by other machines • Geographical Distribution and Availbility • Flexible configuration • e.g. 1 Disk server, 3 Computing servers, 1 Graphic server, etc. • Geographical availibility

  8. Distributed System - Scalibility and Heterogeneity 1.1 A distributed system organized as middleware. Heterogeneity and Scalibility

  9. Distributed System - Transparency Different forms of transparency in a distributed system.

  10. Server C Driver for B Driver for C Driver for A Server B Server A Distributed System : Heterogeneity Application Program or Client Client has to be provided with one different driver for each server

  11. Server C Server B Server A Distributed System : Heterogeneity and Object-Oriented Approach Application Program or Client Predefined interface Wrapping with predefined interface Encapsulation : Object-Oriented Approach

  12. Software Concepts • An overview of • DOS (Distributed Operating Systems) • NOS (Network Operating Systems) • Middleware

  13. Network Operating System (1) • General structure of a network operating system. 1-19

  14. Network Operating System • Two clients and a server in a network operating system. 1-20

  15. Middleware • General structure of a distributed system as middleware. 1-22

  16. Middleware and Openness • In an open middleware-based distributed system, the protocols used by each middleware layer should be the same, as well as the interfaces they offer to applications. 1.23

  17. MultitieredArchitectures: Example

  18. Alternatives of Multitiers Architectures 1-29

  19. Multicomputer Operating Systems • General structure of a multicomputer operating system 1.14

  20. Distributed Shared Memory Systems • Pages of address space distributed among four machines • Situation after CPU 1 references page 10 • Situation if page 10 is read only and replication is used

  21. Comparison between Systems A comparison between multiprocessor operating systems, multicomputer operating systems, network operating systems, and middleware based distributed systems.

More Related