'Logical clock' diaporamas de présentation

Coordination and Agreement

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Time Synchronization Chapter 9

Time Synchronization Chapter 9. TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A. Rating. Area maturity Practical importance Theoretical importance. First steps Text book.

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Time Synchronization Chapter 9

Time Synchronization Chapter 9. TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A. Rating. Area maturity Practical importance Theoretical importance. First steps Text book.

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Distributed Systems

Distributed Systems. Processes and Threads. Processes are programs in execution Sequential process: contains single thread of execution Concurrent process: simultaneous interacting sequential processes (asynchronous, each has its own address space)- heavy weight processes

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CS 347: Parallel and Distributed Data Management Notes12: Time and Clocks

CS 347: Parallel and Distributed Data Management Notes12: Time and Clocks. Hector Garcia-Molina. Reference:. Leslie Lamport, Time, clocks, and the ordering of events in a distributed system, Communications of the ACM , Volume 21 , Issue 7 (July 1978), pages: 558 - 565.

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Logical Clocks

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Logical Time

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DCV: A Causality Detection Approach for Large-scale Dynamic Collaboration Environments

DCV: A Causality Detection Approach for Large-scale Dynamic Collaboration Environments. Ning Gu, Qi-Wei Zhang, Jiang-Ming Yang and Wei Ye Fudan University. Jiang-Ming Yang Microsoft Research Asia. Agenda. Introduction Direct Causal Vector Timestamp (DCV) Causality Detection Algorithms

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UBI529 Distributed Algorithms

UBI529 Distributed Algorithms. 2. Time Synchronization in Distributed Systems. Assumptions. Process can perform three kinds of atomic actions/events Local computation Send a single message to a single process Receive a single message from a single process Communication model

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Coverage

Coverage. Nature of Causality Causality: Why is it Important/Useful? Causality in Life vs. Causality in Distributed Systems Modeling Distributed Events - Defining Causality Logical Clocks General Implementation of Logical Clocks Scalar Logical Time

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Ordering of Events in Distributed Systems

UNIVERSITY of WISCONSIN-MADISON Computer Sciences Department. Ordering of Events in Distributed Systems. CS 739 Distributed Systems. Andrea C. Arpaci-Dusseau. Two papers: Time, Clocks, and the Ordering of Events in a Distributed System, Lamport, 1978

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Synchronization in Distributed Systems

Synchronization in Distributed Systems. CS-4513 D-Term 2007

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Time and Clocks

Time and Clocks. uses of time in distributed systems: time-based algorithms (e.g. in security) distributed make gathering event traces for debugging proving or disproving causality (insider trading) common element: need to know in which order events happened. Absolute Time.

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Time, Clocks, and the Ordering of Events in a Distributed System by L. Lamport

Time, Clocks, and the Ordering of Events in a Distributed System by L. Lamport. CS 5204 Operating Systems Vladimir Glina Fall 2005. Overview. Key Points Background Partial Ordering Extension for Total Ordering Further Work Key Points Reiteration Evaluation Discussion. Key Points.

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CSC 8320 Advanced Operating System Logical Clocks Suganya Gunanathan Panther# 002-30-7932

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Time, Clocks, and the Ordering of Events in a Distributed System by L. Lamport

Time, Clocks, and the Ordering of Events in a Distributed System by L. Lamport. CS 5204 Operating Systems Vladimir Glina Fall 2005. Overview. Key Points Background Partial Ordering Extension for Total Ordering Further Work Key Points Reiteration Evaluation Discussion. Key Points.

287 views • 20 slides

Lecture 8: Asynchronous Network Algorithms

A. (1) send m1. (2) send m2. (3) receive m2. B. C. (4) send m2. Lecture 8: Asynchronous Network Algorithms. Completely asynchronous distributed computational model No assumption for speed of processes. No assumption for transmission delay of communication links.

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From the above timing diagram, what can you say about the following events?

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