52 lines
2.4 KiB
Markdown
52 lines
2.4 KiB
Markdown
<!--
|
|
Licensed to the Apache Software Foundation (ASF) under one or more
|
|
contributor license agreements. See the NOTICE file distributed with
|
|
this work for additional information regarding copyright ownership.
|
|
The ASF licenses this file to You under the Apache License, Version 2.0
|
|
(the "License"); you may not use this file except in compliance with
|
|
the License. You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
-->
|
|
|
|
# Hudi
|
|
Apache Hudi (Incubating) (pronounced Hoodie) stands for `Hadoop Upsert Delete and Incremental`.
|
|
Hudi manages the storage of large analytical datasets on DFS (Cloud stores, HDFS or any Hadoop FileSystem compatible storage).
|
|
|
|
### Features
|
|
* Upsert support with fast, pluggable indexing
|
|
* Atomically publish data with rollback support
|
|
* Snapshot isolation between writer & queries
|
|
* Savepoints for data recovery
|
|
* Manages file sizes, layout using statistics
|
|
* Async compaction of row & columnar data
|
|
* Timeline metadata to track lineage
|
|
|
|
Hudi provides the ability to query via three types of views:
|
|
* **Read Optimized View** - Provides excellent snapshot query performance via purely columnar storage (e.g. [Parquet](https://parquet.apache.org/))
|
|
* **Incremental View** - Provides a change stream with records inserted or updated after a point in time.
|
|
* **Real-time View** - Provides snapshot queries on real-time data, using a combination of columnar & row-based storage (e.g Parquet + [Avro](http://avro.apache.org/docs/current/mr.html))
|
|
|
|
Learn more about Hudi at [https://hudi.apache.org](https://hudi.apache.org)
|
|
|
|
### Building Apache Hudi from source {#building-hudi}
|
|
|
|
Hudi requires Java 8 to be installed on a *nix system. Check out [code](https://github.com/apache/incubator-hudi) and
|
|
normally build the maven project, from command line:
|
|
|
|
```
|
|
# Checkout code and build
|
|
git clone https://github.com/apache/incubator-hudi.git && cd incubator-hudi
|
|
mvn clean package -DskipTests -DskipITs
|
|
```
|
|
|
|
### Quickstart
|
|
|
|
Try [https://hudi.apache.org/quickstart.html](https://hudi.apache.org/quickstart.html) to quickly explore Hudi's capabilities using spark-shell.
|