Question

17. What is the difference between MPI_Gather and MPI_Reduce? Draw images if needed.

18. Fill in the blank

In order to run your MPI program one needs a Docker container. A Docker container is created from a Docker _________ which is read-only and is stored on public or private Docker registries.

19. List one advantage of Docker “containerization” versus a virtual machine tool and give a brief motivation.

Answer 1

Answer: here is the answer for your question:

17. MPI_Gather ----> this operation is used to gather data that is distributed across different processes. It finally gather data and reassemble it onto a single process .

MPI_Reduce -----> this operation is used for reduction of data across different processes. A single process collects data from other processes and finally combines them into a reduced form by performing some arthematic operation such as addition,subtraction. Other oeration such as logical or bitwise operations are also possible om th data

the image will surely give more precise idea:

18 . answer is Docker image

19. one main advantage of Docker containerization over virtual machine is that docker container takes very few milliseconds to start and be dev-ready as compared to virtual machine.. Another advantage is that docker containers require very few resources as compared to virtual machine.

I hope this would help you out

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