whsatku / 219351_homework

Webapp homeworks

Homework 2

Build with cmake && make.

Benchmarking threaded impl:
9 8 7 6 5 4 3 2 1 0 
99990 99991 99992 99993 99994 99995 99996 99997 99998 99999 
elapsed time = 43.584559

Benchmarking non-threaded impl:
9 8 7 6 5 4 3 2 1 0 
99990 99991 99992 99993 99994 99995 99996 99997 99998 99999 
elapsed time = 77.787568

Homework 3

Run bench.sh to build and run.

Interestingly, it is found that the C++ version is faster than C version for hot startup:

C: Elapsed time MPI_Wtime is 1.107012
C++: Elapsed time MPI_Wtime is 1.02438

Homework 5

Needs the complete project structure to compile, which is not included.

• Problem 5: Result will be printed
• Problem 6: Run with input and output path as arguments. Both must be HDFS path.
• Problem 7: May take a few days to complete. Run with input as argument, output is printed.
• Problem 8: Run with input and output path as arguments. Both must be HDFS path.

Homework 6

• Problem4: Result will be saved in problem4_out in HDFS
• Problem5: Result will be printed, may be partial solution