CS245 Assignment 1, MemStore

Running JUnit tests

The starter code has JUnit tests to sanity check the correctness of implementations. These can be run using your favorite IDE's "Run All Tests" functionality. Only the CSVLoaderTest and RandomizedLoaderTest will pass with the starter code. Alternatively the following commands can be used to run all unit tests or run a specific unit test:

mvn test
mvn -Dtest=memstore.table.ColumnSumTest test

Replicating Gradescope tests

The code can be compiled using Maven; the following command generates a jar file for the entire project,

mvn package

You can simulate what the grader machines will do by running the autograder script. The script has command line arguments you can see here:

java -jar target/benchmarks.jar -h

The complete command looks like

java -Xmx1328m -Xms500m -jar target/benchmarks.jar -m [mode] -i [num_iter] -ci [num_custom_iter] -o ./out.json

• [num_iter] is the number of times the timing benchmarks (excluding those for the custom table) are run. A higher num_iter value gives more accurate timing estimates but takes longer to run.
• [num_custom_iter] is the number of times the timing benchmarks for the custom table are run.
• [mode] can be one of all|timings|correctness|custom. This is used to determine which tests to run. Timings just runs the timing tests, correctness just runs the correctness tests, and custom runs the custom query workload on the CustomTable.
• Xmx, Xms control the memory allocated to java

On Gradescope, we will run the following command,

java -Xmx1328m -Xms500m -XX:-TieredCompilation -jar target/benchmarks.jar -m all -i 60 -ci 30 -o GRADE_FILE

Gradescope runs will take around 10 minutes to complete, so make sure to try submitting well before the deadline: you will see your final grade on the standard tests when the grader completes, allowing you to iterate and fix issues.

Submission

Prepare ColumnTable.java, CustomTable.java, IndexedTable.java, RowTable.java. Then, submit a zip archive with just these files. You can do this using the following bash script:

bash create_submission.sh