The Benchto benchmarks utilize Benchto benchmarking utility to do macro benchmarking of Presto. As opposed to micro benchmarking which exercises a class or a small, coherent set of classes, macro benchmarks done with Benchto use Presto end-to-end, by accessing it through its API (usually with presto-jdbc), executing queries, measuring time and gathering various metrics.

Even though benchmarks exercise Presto end-to-end, a single benchmark cannot use all Presto features. Therefore benchmarks are organized in suites, like:

• tpch - queries closely following the TPC-H benchmark
• tpcds - queries closely following the TPC-DS benchmark

• Presto already installed on the target environment
• Basic understanding of Benchto components and architecture
• Benchto service configured and running
• An environment defined in Benchto service

Benchto driver needs to know two things: what benchmark is to be run and what environment it is to be run on. For the purpose of the following example, we will use tpch benchmark and Presto server running at localhost:8080, with Benchto service running at localhost:8081.

Benchto driver uses Sprint Boot to locate environment configuration file, so to pass the configuration. To continue with our example, one needs to place an application-presto-devenv.yaml file in the current directory (i.e. the directory from which the benchmark will be invoked), with the following content:

benchmark-service:
  url: http://localhost:8081

data-sources:
  presto:
    url: jdbc:presto://localhost:8080
    username: na
    password: na
    driver-class-name: com.facebook.presto.jdbc.PrestoDriver

environment:
  name: PRESTO-DEVENV

presto:
  url: http://localhost:8080

benchmark:
  feature:
    presto:
      metrics.collection.enabled: true

macros:
  sleep-4s:
    command: echo "Sleeping for 4s" && sleep 4
      

It is possible to override benchmark variables with benchto-driver overrides feature. This is useful for instance when one wants to use different number of benchmark runs or different underlying schemas. Create a simple overrides.yaml file:

runs:10
tpch_medium: tpcds_10gb_txt

With the scene set up as in the previous section, the benchmark can be run with:

./mvnw clean package -pl presto-benchto-benchmarks
java -Xmx1g -jar presto-benchto-benchmarks/target/presto-benchto-benchmarks-*-executable.jar \
    --sql presto-benchto-benchmarks/src/main/resources/sql \
    --benchmarks presto-benchto-benchmarks/src/main/resources/benchmarks \
    --activeBenchmarks=presto/tpch --profile=presto-devenv \
    --overrides overrides.yaml