MULTICAST COMMUNICATION-TOTAL ORDERING OF ATOMIC ORDERING-BROADCAST AND MULTICAST

Diznr International

2 months ago

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https://www.gyanodhan.com/video/7A2.%20Computer%20Science/Distributed%20Computing/315.%20Day%2004%20Part%2004%20Multicast%20Communication%20total%20ordering%20or%20Atomic%20Orderingbroadcast%20and%20multicast.mp4

Contents

1 Multicast Communication and Ordering Guarantees
2 1. Atomic Ordering in Multicast Communication
3 2. Total Ordering of Messages
4 3. Broadcast vs. Multicast

Multicast Communication and Ordering Guarantees

Multicast communication is a method of data transmission where a message is sent from one sender to multiple receivers. It is commonly used in distributed systems, networks, and group communications.

1. Atomic Ordering in Multicast Communication

Atomic ordering ensures that all messages in a multicast system are delivered either to all recipients or to none, preventing partial deliveries.

2. Total Ordering of Messages

Total ordering guarantees that all processes in the system receive messages in the same order. It ensures consistency in distributed systems, preventing race conditions and inconsistencies.

Methods for achieving total ordering:
1. Centralized Sequencer – A single process assigns sequence numbers to messages.
2. Distributed Agreement – Protocols like Paxos or Lamport Timestamps are used to determine order.
3. Causal Ordering – Ensures messages that are causally related are received in the correct sequence.

3. Broadcast vs. Multicast

Feature	Broadcast	Multicast
Scope	Sent to all nodes in the network	Sent to a specific group of nodes
Efficiency	Can be inefficient due to unnecessary delivery	More efficient as only intended recipients receive it
Use Case	ARP requests, network-wide announcements	Video conferencing, stock market data distribution

Would you like more details on a specific aspect, such as protocols for total ordering?