Hadoop-Compatible Java Client

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Alluxio provides access to data through a filesystem interface. Files in Alluxio offer write-once semantics: they become immutable after they have been written in their entirety and cannot be read before being completed. Alluxio provides two different Filesystem APIs, an Alluxio API and a Hadoop compatible API. The Alluxio API provides additional functionality, while the Hadoop compatible API gives users the flexibility of leveraging Alluxio without having to modify existing code written using Hadoop’s API.

Alluxio has a wrapper of the Java client which provides the Hadoop compatible FileSystem interface. With this client, Hadoop file operations will be translated to FileSystem operations. The latest documentation for the FileSystem interface may be found here.

The Hadoop compatible interface is provided as a convenience class, allowing users to reuse previous code written for Hadoop.