Scio

Ecclesiastical Latin IPA: /ˈʃi.o/, [ˈʃiː.o], [ˈʃi.i̯o]

Verb: I can, know, understand, have knowledge.

Scio is a Scala API for Apache Beam and Google Cloud Dataflow inspired by Apache Spark and Scalding. See the current API documentation for more information.

Scio 0.3.0 and future versions depend on Apache Beam (org.apache.beam) while earlier versions depend on Google Cloud Dataflow SDK (com.google.cloud.dataflow). See this page for a list of breaking changes.

Features

Scala API close to that of Spark and Scalding core APIs
Unified batch and streaming programming model
Fully managed service^*
Integration with Google Cloud products: Cloud Storage, BigQuery, Pub/Sub, Datastore, Bigtable
HDFS, JDBC, TensorFlow TFRecords, Cassandra and Elasticsearch I/O
Interactive mode with Scio REPL
Type safe BigQuery
Integration with Algebird and Breeze
Pipeline orchestration with Scala Futures
Distributed cache

^* provided by Google Cloud Dataflow

Quick Start

The ubiquitous word count example can be run directly with SBT in local mode, using README.md as input.

sbt "scio-examples/run-main com.spotify.scio.examples.WordCount --input=README.md --output=wc"
cat wc/part-00000-of-00001.txt

Documentation

Scio Wiki - wiki page
ScalaDocs - current API documentation
Big Data Rosetta Code - comparison of code snippets in Scio, Scalding and Spark

Artifacts

Scio includes the following artifacts:

scio-core: core library
scio-test: test utilities, add to your project as a "test" dependency
scio-bigquery: add-on for BigQuery, included in scio-core but can also be used standalone
scio-bigtable: add-on for Bigtable
scio-cassandra2: add-on for Cassandra 2.x
scio-cassandra3: add-on for Cassandra 3.x
scio-elasticsearch2: add-on for Elasticsearch 2.x
scio-elasticsearch5: add-on for Elasticsearch 5.x
scio-extra: extra utilities for working with collections, Breeze, etc.
scio-hdfs: add-on for HDFS IO
scio-jdbc: add-on for JDBC IO
scio-tensorflow: add-on for TensorFlow TFRecords IO and prediction

License