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Ballista Examples

This directory contains examples for executing distributed queries with Ballista.

For background information on the Ballista architecture, refer to the Ballista README.

Start a standalone cluster

From the root of the arrow-datafusion project, build release binaries.

cargo build --release

Start a Ballista scheduler process in a new terminal session.

RUST_LOG=info ./target/release/ballista-scheduler

Start one or more Ballista executor processes in new terminal sessions. When starting more than one executor, a unique port number must be specified for each executor.

RUST_LOG=info ./target/release/ballista-executor -c 4

Running the examples

Refer to the instructions in DEVELOPERS.md to define the ARROW_TEST_DATA and PARQUET_TEST_DATA environment variables so that the examples can find the test data files.

The examples can be run using the cargo run --bin syntax.

cargo run --release --bin ballista-dataframe