52 lines
2.4 KiB
Markdown
52 lines
2.4 KiB
Markdown
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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# Hudi
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Apache Hudi (Incubating) (pronounced Hoodie) stands for `Hadoop Upserts anD Incrementals`.
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Hudi manages the storage of large analytical datasets on DFS (Cloud stores, HDFS or any Hadoop FileSystem compatible storage).
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### Features
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* Upsert support with fast, pluggable indexing
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* Atomically publish data with rollback support
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* Snapshot isolation between writer & queries
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* Savepoints for data recovery
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* Manages file sizes, layout using statistics
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* Async compaction of row & columnar data
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* Timeline metadata to track lineage
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Hudi provides the ability to query via three types of views:
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* **Read Optimized View** - Provides excellent snapshot query performance via purely columnar storage (e.g. [Parquet](https://parquet.apache.org/))
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* **Incremental View** - Provides a change stream with records inserted or updated after a point in time.
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* **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))
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Learn more about Hudi at [https://hudi.apache.org](https://hudi.apache.org)
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### Building Apache Hudi from source {#building-hudi}
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Hudi requires Java 8 to be installed on a *nix system. Check out [code](https://github.com/apache/incubator-hudi) and
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normally build the maven project, from command line:
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```
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# Checkout code and build
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git clone https://github.com/apache/incubator-hudi.git && cd incubator-hudi
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mvn clean package -DskipTests -DskipITs
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```
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### Quickstart
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Try [https://hudi.apache.org/quickstart.html](https://hudi.apache.org/quickstart.html) to quickly explore Hudi's capabilities using spark-shell.
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