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Spark Benchmark Tool

This tool is inspired by the TestDFSIO benchmark tool for Hadoop mapreduce. This tool will use the Spark framework for writing to HDFS.

Disclaimer

Lies, damn lies and benchmarks. Goal of this project is providing a somewhat usefull sanity check of your Spark setup, focusing on the HDFS writing performance, not on the compute performance.

Getting the Spark Jar

Download the Spark Jar from here: https://github.com/wardbekker/benchmark/releases/download/v0.1/benchmark-1.0-SNAPSHOT-jar-with-dependencies.jar

It's build for Spark 1.6.2 / Scala 2.10.5

Submit args explained:

<file/partitions> : should ideally be equal to recommended spark.default.parallelism (cores x instances).

<bytes_per_file> : should fit in memory: for example: 90000000.

<write_repetitions> : no of re-writing of the test RDD to disk. benchmark will be averaged.

spark-submit --class org.ward.Benchmark  --master yarn --deploy-mode cluster --num-executors X --executor-cores Y --executor-memory Z target/benchmark-1.0-SNAPSHOT-jar-with-dependencies.jar <files/partitions> <bytes_per_file> <write_repetitions>

CLI Example for 12 workers with 30GB mem per node:

This command will write out the generated RDD 10 times, and will calculate an aggregate throughput over it.

spark-submit --class org.ward.Benchmark  --master yarn --deploy-mode cluster --num-executors 60 --executor-cores 3 --executor-memory 4G target/benchmark-1.0-SNAPSHOT-jar-with-dependencies.jar 180 90000000 10

Retrieving benchmark results:

Retrieve the benchmark results by running:

yarn logs -applicationId <application_id> | grep 'Benchmark'

for example:

Benchmark: Total volume         : 81000000000 Bytes
Benchmark: Total write time     : 74.979 s
Benchmark: Aggregate Throughput : 1.08030246E9 Bytes per second