12- reliable multicast2

12- reliable multicast2 - CSE 486/586 Distributed Systems...

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CSE 486/586, Spring 2012 CSE 486/586 Distributed Systems Reliable Multicast --- 2 Steve Ko Computer Sciences and Engineering University at Buffalo
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CSE 486/586, Spring 2012 Recap: Multicast How do a group of processes communicate? Multicast One-to-many: “Local” broadcast within a group g of processes What are the issues? Processes crash (we assume crash-stop) Messages get delayed B-multicast R-Multicast Properties: integrity, agreement, validity Ordering Why do we care about ordering? 2
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Recap: Ordering F 3 F 1 F 2 T 2 T 1 P 1 P 2 P 3 Time C 3 C 1 C 2 Totally ordered messages T1 and T2 . FIFO-related messages F1 and F2 . Causally related messages C1 and C3 Total ordering does not imply causal ordering. Causal ordering implies FIFO ordering Causal ordering does not imply total ordering. Hybrid mode: causal-total ordering, FIFO-total ordering. 3
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This document was uploaded on 02/27/2012.

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12- reliable multicast2 - CSE 486/586 Distributed Systems...

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