DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 6 pptx

DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 6 pptx

DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 6 pptx

... many distributed systems, and are discussed extensively in this chapter. The main difficulty in designing secure distributed systems is not so much caused by security mechanisms, but by SEC. 8 .6 RECOVERY 369 Coordinated ... checkpoints and message logging. Elnozahy et al. (2002) provide a survey of checkpointing and logging in distributed systems. Various algorithmic detai...
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DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 3 pptx

DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 3 pptx

... distributed systems and applications are built directly on top of the sim- ple message-oriented model offered by the transport layer. To better understand and appreciate the message-oriented systems ... message- oriented communication in distributed systems by first taking a closer look at what exactly synchronous behavior is and what its implications are. Then, we dis- cuss m...
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DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 1 pot

DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 1 pot

... Three-Phase Commit 360 8 .6 RECOVERY 363 8 .6. 1 Introduction 363 8 .6. 2 Checkpointing 366 xi 321 x CONTENTS 6 SYNCHRONIZATION 231 6. 1 CLOCK SYNCHRONIZATION 232 6. 1.1 Physical Clocks 233 6. 1.2 Global Positioning ... ELECTION ALGORITHMS 263 6. 5.1 Traditional Election Algorithms 264 6. 5.2 Elections in Wireless Environments 267 6. 5.3 Elections in Large-Scale Systems 269 6....
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DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 2 pps

DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 2 pps

... one for handling interaction with the user and SEC. 2.2 SYSTEM ARCHITECTURES 53 Collaborative Distributed Systems Hybrid structures are notably deployed in collaborative distributed systems. The ... architectures and software architectures. On the one hand, we need to organize the components of a distributed system such that monitoring and adjustments can be done, while on the...
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DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 4 ppt

DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 4 ppt

... defined the second to be the time it takes the cesium 133 atom to make exactly 9,192 ,63 1,770 transitions. The choice of 9,192 ,63 1,770 was made to make the atomic second equal to the mean solar second ... anything to do with papal decrees and did not accept the Gregorian calendar for 170 years. Figure 6- 3. TAl seconds are of constant length, unlike solar seconds. Leap seconds are...
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DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 5 pot

DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 5 pot

... is known as a write-back cache, which is, again, mainly applied in distributed file systems. 268 SYNCHRONIZATION CHAP. 6 Figure 6- 22. Election algorithm in a wireless network, with node a as the ... used to handling replication, let alone understanding what it means to provide detailed information on consistency. Therefore, it is mandatory that there are simple and easy-to-under-...
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DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 7 pdf

DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 7 pdf

... the capability), and then runs the result through a one-way function. 444 DISTRIBUTED OBJECT-BASED SYSTEMS CHAP. 10 Object orientation began to be used for developing distributed systems in the 1980s. ... generation of distributed systems. In this section, we will first take a deeper look into the general architecture of object-based distributed systems, after which we can se...
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DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 8 docx

DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 8 docx

... If this 11 DISTRIBUTED FILE SYSTEMS Considering that sharing data is fundamental to distributed systems, it is not surprising that distributed file systems form the basis for many distributed ... systems and applications. In this chapter, we consider distributed file systems as a paradigm for general-purpose distributed systems. 11.1 ARCHITECTURE We start our discussi...
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DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 9 docx

DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 9 docx

... 566 DISTRIBUTED WEB;.BASED SYSTEMS CHAP. 12 12.3.2 Simple Object Access Protocol Where HTTP is the standard communication protocol for traditional Web- based distributed systems, the ... can be enforced. Clearly, whenever a main document is changed. a DISTRIBUTED WEB-BASED SYSTEMS CHAP. 12 564 DISTRIBUTED WEB-BASED SYSTEMS CHAP. 12 Figure 12-12. (a) HTTP request message. (b) H...
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