Practice - Issues in Recording a Global State: The 'Inconsistent Snapshot' Problem
Practice Questions
Test your understanding with targeted questions
What is a global state in a distributed system?
💡 Hint: Think about what a single point of observation would consist of.
Define the term 'inconsistent snapshot.'
💡 Hint: Consider the implications of incomplete or contradictory recordings.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the main challenge in recording a global state in distributed systems?
💡 Hint: Consider what happens when different processes record their states at different times.
The Chandy-Lamport algorithm uses which type of message to ensure consistency?
💡 Hint: Think of what kind of message helps mark points in time.
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Challenge Problems
Push your limits with advanced challenges
Suppose you have three processes where Process A sends a message to Process B, and after some time, Process C sends a message to Process A. If Process A records its state after sending but before receiving Process C's message, analyze the global state that could emerge.
💡 Hint: How do the sequences of events help create this scenario?
Formulate a new approach to improve the consistency of snapshots across a large distributed network. Consider the limitations of current algorithms.
💡 Hint: What mechanisms do consensus protocols use that could be adapted to snapshot recording?
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