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Checkpointing in High Performance Computing

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Questions and Answers

What is the primary reason why applications with long execution times are a concern in supercomputing?

They violate supercomputer usage policies
They waste computing resources
They increase the risk of hardware or software failure (correct)
They cannot utilize checkpointing

What is the primary purpose of checkpointing in supercomputing?

To improve load-balancing decisions
To aid in performance monitoring and analysis
To provide snapshots of the application at different simulation epochs
To mitigate the risk of execution failure and associated losses (correct)

What is a characteristic of checkpoint files?

They are exclusively used in system-level approaches
They are typically small in size
They can be extremely large (correct)
They are used for debugging purposes only

What is the term used to describe the resumption of application execution from a saved checkpoint?

Restart (D) Signup and view all the answers

What is a secondary benefit of checkpointing beyond mitigating the cost of execution failure?

All of the above (D) Signup and view all the answers

What are the two approaches to checkpointing frequently encountered in HPC?

System-level and application-level approaches (C) Signup and view all the answers

What is the primary purpose of checkpointing in high performance computing?

To allow resumption of an application in case of system failure (D) Signup and view all the answers

What type of applications typically require very long runtimes on HPC resources?

Molecular dynamics simulations, fluid-flow simulations, and astrophysical compact object merger simulations (C) Signup and view all the answers

How can application checkpoint and restart be performed?

Either by modifying the application code or using system-level checkpointing tools (B) Signup and view all the answers

Why may an application require large runtimes on HPC resources even with many compute resources?

Because it is not strong scaling (B) Signup and view all the answers

What is a benefit of using application-level checkpointing libraries?

They can assist in designing and executing checkpoint and restart (A) Signup and view all the answers

What is a characteristic of high performance computing input/output operations?

They have more flexibility in terms of speed compared to other I/O operations (A) Signup and view all the answers

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