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See the License for the specific language governing permissions and limitations under the License. --> # Apache Arrow [](https://ci.appveyor.com/project/ApacheSoftwareFoundation/arrow/branch/master) [](https://codecov.io/gh/apache/arrow?branch=master) [](https://bugs.chromium.org/p/oss-fuzz/issues/list?sort=-opened&can=1&q=proj:arrow) [](https://github.com/apache/arrow/blob/master/LICENSE.txt) [](https://twitter.com/apachearrow) ## Powering In-Memory Analytics Apache Arrow is a development platform for in-memory analytics. It contains a set of technologies that enable big data systems to process and move data fast. Major components of the project include: - [The Arrow Columnar In-Memory Format](https://github.com/apache/arrow/blob/master/docs/source/format/Columnar.rst): a standard and efficient in-memory representation of various datatypes, plain or nested - [The Arrow IPC Format](https://github.com/apache/arrow/blob/master/docs/source/format/Columnar.rst#serialization-and-interprocess-communication-ipc): an efficient serialization of the Arrow format and associated metadata, for communication between processes and heterogeneous environments - [The Arrow Flight RPC protocol](https://github.com/apache/arrow/tree/master/format/Flight.proto): based on the Arrow IPC format, a building block for remote services exchanging Arrow data with application-defined semantics (for example a storage server or a database) - [C++ libraries](https://github.com/apache/arrow/tree/master/cpp) - [C bindings using GLib](https://github.com/apache/arrow/tree/master/c_glib) - [C# .NET libraries](https://github.com/apache/arrow/tree/master/csharp) - [Gandiva](https://github.com/apache/arrow/tree/master/cpp/src/gandiva): an [LLVM](https://llvm.org)-based Arrow expression compiler, part of the C++ codebase - [Go libraries](https://github.com/apache/arrow/tree/master/go) - [Java libraries](https://github.com/apache/arrow/tree/master/java) - [JavaScript libraries](https://github.com/apache/arrow/tree/master/js) - [Plasma Object Store](https://github.com/apache/arrow/tree/master/cpp/src/plasma): a shared-memory blob store, part of the C++ codebase - [Python libraries](https://github.com/apache/arrow/tree/master/python) - [R libraries](https://github.com/apache/arrow/tree/master/r) - [Ruby libraries](https://github.com/apache/arrow/tree/master/ruby) - [Rust libraries](https://github.com/apache/arrow/tree/master/rust) Arrow is an [Apache Software Foundation](https://www.apache.org) project. Learn more at [arrow.apache.org](https://arrow.apache.org). ## What's in the Arrow libraries? The reference Arrow libraries contain many distinct software components: - Columnar vector and table-like containers (similar to data frames) supporting flat or nested types - Fast, language agnostic metadata messaging layer (using Google's Flatbuffers library) - Reference-counted off-heap buffer memory management, for zero-copy memory sharing and handling memory-mapped files - IO interfaces to local and remote filesystems - Self-describing binary wire formats (streaming and batch/file-like) for remote procedure calls (RPC) and interprocess communication (IPC) - Integration tests for verifying binary compatibility between the implementations (e.g. sending data from Java to C++) - Conversions to and from other in-memory data structures - Readers and writers for various widely-used file formats (such as Parquet, CSV) ## Implementation status The official Arrow libraries in this repository are in different stages of implementing the Arrow format and related features. See our current [feature matrix](https://github.com/apache/arrow/blob/master/docs/source/status.rst) on git master. ## How to Contribute Please read our latest [project contribution guide][5]. ## Getting involved Even if you do not plan to contribute to Apache Arrow itself or Arrow integrations in other projects, we'd be happy to have you involved: - Join the mailing list: send an email to [dev-subscribe@arrow.apache.org][1]. Share your ideas and use cases for the project. - [Follow our activity on JIRA][3] - [Learn the format][2] - Contribute code to one of the reference implementations [1]: mailto:dev-subscribe@arrow.apache.org [2]: https://github.com/apache/arrow/tree/master/format [3]: https://issues.apache.org/jira/browse/ARROW [4]: https://github.com/apache/arrow [5]: https://github.com/apache/arrow/blob/master/docs/source/developers/contributing.rst