1. What is the sequence of operations at the coordinator after it recovers? 2. What is the sequence of operations at a subordinate that received the message and replied to it before the coordinator crashed? 3. What is the sequence of operations at a subordinate that did not receive the message before the coordinator crashed.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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In the two-phase commit protocol, what happens if the coordinator sends
PREPARE messages and crashes before receiving any votes?
1. What is the sequence of operations at the coordinator after it
recovers?
2. What is the sequence of operations at a subordinate that received
the message and replied to it before the coordinator crashed?
3. What is the sequence of operations at a subordinate that did not
receive the message before the coordinator crashed.
Transcribed Image Text:In the two-phase commit protocol, what happens if the coordinator sends PREPARE messages and crashes before receiving any votes? 1. What is the sequence of operations at the coordinator after it recovers? 2. What is the sequence of operations at a subordinate that received the message and replied to it before the coordinator crashed? 3. What is the sequence of operations at a subordinate that did not receive the message before the coordinator crashed.
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