'Reliable multicasting' diaporamas de présentation

CIS 620 Advanced Operating Systems

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Fault Tolerance

Fault Tolerance. Part I Introduction Part II Process Resilience Part III Reliable Communication Part IV Recovery Part V Distributed Commit. Chapter 7. Fault Tolerance. Chapter 7. Part I Introduction. Fault Tolerance. A DS should be fault-tolerant

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Distributed Systems CS 15-440

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Distributed Systems CS 15-440

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Fault Tolerance

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Distributed Systems Principles and Paradigms

Distributed Systems Principles and Paradigms. Chapter 07 Fault Tolerance. 01 Introduction 02 Communication 03 Processes 04 Naming 05 Synchronization 06 Consistency and Replication. 07 Fault Tolerance 08 Security 09 Distributed Object-Based Systems 10 Distributed File Systems

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Fault Tolerance

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Fault Tolerance

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Fault Tolerance

Fault Tolerance. Basic Concepts. Dependability includes Availability = probability the system is operating correctly at any point in time Reliability = time period the system is working correctly Availability is different than reliability

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Fault Tolerance

Fault Tolerance. Chapter 7. Basic Concepts. Dependability Includes Availability Reliability Safety Maintainability. Basic Concepts. Availability : the probability that the system is operating correctly at any given moment and is able to perform its function.

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Fault Tolerance (2)

Fault Tolerance (2). Topics. Reliable Group Communication. Readings. Van Steen and Tanenbaum: 7.4 Coulouris: 11,14. Issues. Reliable Group Communication. Reliable Multicast Communication. IP multicast uses UDP which means that it is not reliable.

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Fault Tolerance II

Fault Tolerance II. Quiz 22 due at 5 PM Saturday, 18 October 2014. Lost Reply Messages. Safely repeated requests are idempotent; e.g., resend a file block, not retransfer $1000. It is safest to assume that no request is idempotent:

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Fault Tolerance

Fault Tolerance. Chapter 7. Basic Concepts. Dependability Includes Availability Reliability Safety Maintainability. Failure Models. Different types of failures. Failure Masking by Redundancy. Triple modular redundancy. Flat Groups versus Hierarchical Groups.

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Reliable Multicast Group

Reliable Multicast Group. Neelofer T. CMSC 621. What is Reliable Multicasting?. Reliability could mean messages are delivered: To each process In same order In timely manner No duplicates Ensure reliability when Processes enter/leave the group Processes fail while communicating.

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Reliable Multicast Group

Reliable Multicast Group. Neelofer T. CMSC 621. What is Reliable Multicasting?. Reliability could mean messages are delivered: To each process In same order In timely manner No duplicates Ensure reliability when Processes enter/leave the group Processes fail while communicating.

391 views • 27 slides

Reliable Multicast Group

Reliable Multicast Group. Neelofer T. CMSC 621. What is Reliable Multicasting?. Reliability could mean messages are delivered: To each process In same order In timely manner No duplicates Ensure reliability when Processes enter/leave the group Processes fail while communicating.

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Reliable Group Communication

Reliable Group Communication. Reliable Multicasting Basic Reliable Multicasting Scalable Reliable Multicasting Atomic multicast Atomic multicast build on SRM Virtual synchrony Message ordering Implementing Virtual synchrony. IP Multicast (vs overlay multicast).

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Fault Tolerance

Fault Tolerance. CSCI 4780/6780. Reliable Group Communication. Reliable multicasting is important for several applications Transport layer protocols rarely offer reliable multicasting What is reliable multicasting? Communication sent to the group should reach each member

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