DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 1 pot
DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 1 pot
... File-Sharing Systems 539 11 .9 SUMMARY 5 41 12 DISTRIBUTED WEB-BASED SYSTEMS 545 12 .1 ARCHITECTURE 546 12 .1. 1 Traditional Web-Based Systems 546 12 .1. 2 Web Services 5 51 12.2 PROCESSES 554 12 .2 .1 Clients ... 9 1. 2.5 Pitfalls 16 1. 3 TYPES OF DISTRIBUTED SYSTEMS 17 1. 3 .1 Distributed Computing Systems 17 1. 3.2 Distributed Information Systems 20 1. 3.3 Distributed Pervasive Systems 24 1. 4 SUMMARY 302ARCHITECTURES ... 5]9 11 .6 .1 Client-Side Caching 520 11 .6.2 Server-Side Replication 524 11 .6.3 Replication in Peer-to-Peer File Systems 526 11 .6.4 File Replication in Grid Systems 528 11 .7 FAULT TOLERANCE 529 11 .7.1...
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DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 5 pot
... m=8 and k=3.When looking up the node responsible for a specific keyp,we can first decide toroute the lookup request to the node responsible for the patternp AND 11 100000 314 CONSISTENCY AND ... separate criteria are often maintained to classify caching protocols (Min and Baer, 19 92; Lilja, 19 93; and Tartalja and Milutinovic, 19 97).First, caching solutions may differ in their coherence detection ... used to handlingreplication, let alone understanding what it means to provide detailed informationon consistency. Therefore, it is mandatory that there are simple and easy-to-under-stand programming...
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DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 2 pps
... requests, and hands off such connec-tions to one of the servers (Hunt et al, 19 97; and Pai et al., 19 98). The principleworking of what is commonly known as TCP handoff is shown in Fig. 3 -13 .When ... node of the distributed server, as shown in Fig. 3 -14 . Tothis end, when an access point of a distributed server forwards a request from cli-ent C 1 to, say node S 1 (with address CA 1) 'it ... one for handling interaction with the user and SEC. 2.2SYSTEM ARCHITECTURES53Collaborative Distributed Systems Hybrid structures are notably deployed in collaborative distributed systems. The...
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DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 3 pptx
... buffer corresponds to 9 seconds of packets to pass to theapplication. Unfortunately, packet #8 took 11 seconds to reach the receiver, at 12 8COMMUN1CATIONCHAP. 4Client and Server StubsThe idea ... earlier,if the second parameter (the address of the buffer) happens to be 10 00 on the cli-ent, one cannot just pass the number 10 00 to the server and expect it to work.Address 10 00 on the server ... execu-tion mode of the sender and receiver, as shown in Fig. 4 -17 .In Fig.4 -17 (a), both the sender and receiver execute during the entiretransmission of a message. In.Fig. 4 -17 (b), only the sender...
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DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 4 ppt
... for a 1: Slltakes care of recording values of a1 in [1 5], and S12 for values in [6 10 ].Likewise, server S 21 records values for a2 in range [10 1 15 0] and server S22 forvalues in [15 1 200]. ... defined the second to be the time ittakes the cesium 13 3 atom to make exactly 9 ,19 2,6 31, 770 transitions. The choiceof 9 ,19 2,6 31, 770 was made to make the atomic second equal to the mean solar second ... and a single server is assigned to each subrange. To explain, consider aresource description with two attributes: a 1 taking values in the range [1 10] and a2 taking values in the range [10 1...
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DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 6 pptx
... checkpoints and message logging. Elnozahy et al. (2002) provide a survey of checkpointing and logging in distributed systems. Various algorithmic details can be found in Chow and Johnson (19 97).8.6.2 ... works as shown in Fig. 8 -11 .Figure 8 -11 . The essence of hierarchical reliable multicasting. Each local coor-dinator forwards the message to its children and later handles retransmission re-quests.To ... messagesm 1 and m 2 from process P and R, respectively, and subsequently sends a messagem3to R. However, in contrast to all other messages, message m2is not logged. IfprocessQcrashes and later...
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DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 7 pdf
... 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 19 80s. ... into the key exchangetaking place between Alice and Bob, and subsequently ruin the security. Explain howthis would work.SEC. 10 .1 ARCHITECTURE4 51 The control. subobject is used as an intermediate ... issues.) 11 •.What is the role of the timestamp in message 6 in Fig. 9-23, and why does it need tobe encrypted? 12 . Complete Fig. 9-23 by adding the communication for authentication between Aliceand...
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DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 8 docx
... in Fig. 11 -13 .502 DISTRIBUTED FILE SYSTEMS CHAP. 11 11 .3 COMMUNICATIONAs with processes, there is nothing particularly special or unusual about com-munication in distributed file systems. ... successfully opens a file 1, an entire copy offis transferred to the client's 512 DISTRIBUTED FILE SYSTEMS CHAP. 11 Figure 11 -14 . Using symbolic links with automounting. 11 .4.2 Constructing a ... systems and applications. In this chapter, we consider distributed file systems as a paradigm for general-purpose distributed systems. 11 .1 ARCHITECTUREWe start our discussion on distributed file systems...
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DISTRIBUTED SYSTEMS principles and paradigms Second Edition phần 9 docx
... 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) HTTP response message.Fig. 12 -13 shows a number ... 566 DISTRIBUTED WEB;.BASED SYSTEMS CHAP. 12 12 .3.2 Simple Object Access ProtocolWhere HTTP is the standard communication protocol for traditional Web-based distributed systems, the ... application server, and adatabase. The Web server is the traditional Web server that we had before; the DISTRIBUTED WEB-BASED SYSTEMS CHAP. 12 SEC. 13 .2ARCHITECTURES599identifier i 1 >j,such...
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