Amoro(former name was Arctic) is a Lakehouse management system built on open data lake formats. Working with compute engines including Flink, Spark, and Trino, Amoro brings pluggable and self-managed features for Lakehouse to provide out-of-the-box data warehouse experience, and helps data platforms or products easily build infra-decoupled, stream-and-batch-fused and lake-native architecture.

Architecture

Here is the architecture diagram of Amoro:

• AMS: Amoro Management Service provides Lakehouse management features, like self-optimizing, data expiration, etc. It also provides a unified catalog service for all compute engines, which can also be combined with existing metadata services.
• Plugins: Amoro provides a wide selection of external plugins to meet different scenarios.
  • Optimizers: The self-optimizing execution engine plugin asynchronously performs merging, sorting, deduplication, layout optimization, and other operations on all type table format tables.
  • Terminal: SQL command-line tools, provide various implementations like local Spark and Kyuubi.
  • LogStore: Provide millisecond to second level SLAs for real-time data processing based on message queues like Kafka and Pulsar.

Supported table formats

Amoro can manage tables of different table formats, similar to how MySQL/ClickHouse can choose different storage engines. Amoro meets diverse user needs by using different table formats. Currently, Amoro supports four table formats:

• Iceberg format: Users can directly entrust their Iceberg tables to Amoro for maintenance, so that users can not only use all the functions of Iceberg tables, but also enjoy the performance and stability improvements brought by Amoro.
• Mixed-Iceberg format: Amoro provides a set of more optimized formats for streaming update scenarios on top of the Iceberg format. If users have high performance requirements for streaming updates or have demands for CDC incremental data reading functions, they can choose to use the Mixed-Iceberg format.
• Mixed-Hive format: Many users do not want to affect the business originally built on Hive while using data lakes. Therefore, Amoro provides the Mixed-Hive format, which can upgrade Hive tables to Mixed-Hive format only through metadata migration, and the original Hive tables can still be used normally. This ensures business stability and benefits from the advantages of data lake computing.
• Paimon format: Amoro supports displaying metadata information in the Paimon format, including Schema, Options, Files, Snapshots, DDLs, and Compaction information.

Supported engines

Iceberg format

Iceberg format tables use the engine integration method provided by the Iceberg community. For details, please refer to: Iceberg Docs.

Mixed format

Amoro support multiple processing engines for Mixed format as below:

Processing Engine	Version	Batch Read	Batch Write	Batch Overwrite	Streaming Read	Streaming Write	Create Table	Alter Table
Flink	1.15.x, 1.16.x, 1.17.x	✔	✔	✖	✔	✔	✔	✖
Spark	3.1, 3.2, 3.3	✔	✔	✔	✖	✖	✔	✔
Hive	2.x, 3.x	✔	✖	✔	✖	✖	✖	✔
Trino	406	✔	✖	✔	✖	✖	✖	✔

Features

• Self-optimizing - Continuously optimizing tables, including compacting small files, change files, regularly delete expired files to keep high query performance and reducing storage costs.
• Multiple Formats - Support different table formats such as Iceberg, Mixed-Iceberg and Mixed-Hive to meet different scenario requirements and provide them with unified management capabilities.
• Catalog Service - Provide a unified catalog service for all compute engines, which can also used with existing metadata store service such as Hive Metastore and AWS Glue.
• Rich Plugins - Provide various plugins to integrate with other systems, like continuously optimizing with Flink and data analysis with Spark and Kyuubi.
• Management Tools - Provide a variety of management tools, including WEB UI and standard SQL command line, to help you get started faster and integrate with other systems more easily.
• Infrastructure Independent - Can be easily deployed and used in private environments, cloud environments, hybrid cloud environments, and multi-cloud environments.

Modules

Amoro contains modules as below:

• amoro-core contains core abstractions and common implementation for other modules
• amoro-ams is amoro management service module
  • ams-api contains ams thrift api and common interfaces
  • ams-dashboard is the dashboard frontend for ams
  • ams-server is the backend server for ams
  • ams-optimizer provides default optimizer implementation
• amoro-mixed provides Mixed format implementation
  • amoro-hive integrates with Apache Hive and implements Mixed Hive format
  • amoro-flink provides Flink connectors for Mixed format tables (use amoro-flink-runtime for a shaded version)
  • amoro-spark provides Spark connectors for Mixed format tables (use amoro-spark-runtime for a shaded version)
  • amoro-trino provides Trino connectors for Mixed format tables

Building

Amoro is built using Maven with Java 1.8 and Java 17(only for mixed/trino module).

• To build Trino module need config toolchains.xml in ${user.home}/.m2/ dir, the content is

<?xml version="1.0" encoding="UTF-8"?>
<toolchains>
    <toolchain>
        <type>jdk</type>
        <provides>
            <version>17</version>
            <vendor>sun</vendor>
        </provides>
        <configuration>
            <jdkHome>${YourJDK17Home}</jdkHome>
        </configuration>
    </toolchain>
</toolchains>

• To invoke a build and run tests: mvn package -P toolchain
• To skip tests: mvn -DskipTests package -P toolchain
• To package without trino module and JAVA 17 dependency: mvn clean package -DskipTests -pl '!mixed/trino'
• To build with hadoop 2.x(the default is 3.x) mvn clean package -DskipTests -Dhadoop=v2
• To indicate flink version for optimizer(the default is 1.14, 1.15 and 1.16 are available) mvn clean package -DskipTests -Doptimizer.flink=1.15

Spotless is skipped by default in trino module. So if you want to perform checkstyle when building trino module, you must be in a Java 17 environment.

• To invoke a build include mixed/trino module in Java 17 environment: mvn clean package -DskipTests -P trino-spotless
• To only build mixed/trino and its dependent modules in Java 17 environment: mvn clean package -DskipTests -P trino-spotless -pl 'trino' -am

Quickstart

Visit https://amoro.netease.com/quick-demo/ to quickly explore what amoro can do.

Join Community

If you are interested in Lakehouse, Data Lake Format, welcome to join our community, we welcome any organizations, teams and individuals to grow together, and sincerely hope to help users better use Data Lake Format through open source.

Join the Amoro WeChat Group: Add " kllnn999 " as a friend on WeChat and specify "Amoro lover".

Contributors

This project exists thanks to all the people who contribute.

Made with contrib.rocks.

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