apache / Carbondata
Licence: apache-2.0
Mirror of Apache CarbonData
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Apache CarbonData is an indexed columnar data store solution for fast analytics on big data platform, e.g.Apache Hadoop, Apache Spark, etc.
You can find the latest CarbonData document and learn more at: http://carbondata.apache.org
Visit count: 
Status
Spark2.4:
Features
CarbonData file format is a columnar store in HDFS, it has many features that a modern columnar format has, such as splittable, compression schema ,complex data type etc, and CarbonData has following unique features:
- Stores data along with index: it can significantly accelerate query performance and reduces the I/O scans and CPU resources, where there are filters in the query. CarbonData index consists of multiple level of indices, a processing framework can leverage this index to reduce the task it needs to schedule and process, and it can also do skip scan in more finer grain unit (called blocklet) in task side scanning instead of scanning the whole file.
- Operable encoded data :Through supporting efficient compression and global encoding schemes, can query on compressed/encoded data, the data can be converted just before returning the results to the users, which is "late materialized".
- Supports for various use cases with one single Data format : like interactive OLAP-style query, Sequential Access (big scan), Random Access (narrow scan).
Building CarbonData
CarbonData is built using Apache Maven, to build CarbonData
Online Documentation
- What is CarbonData
- Quick Start
- Use Cases
- Language Reference
- CarbonData Data Definition Language
- CarbonData Data Manipulation Language
- CarbonData Streaming Ingestion
- Configuring CarbonData
- Index Developer Guide
- Data Types
- CarbonData Index Management
- CarbonData BloomFilter Index
- CarbonData Lucene Index
- CarbonData MV
- Carbondata Secondary Index
- SDK Guide
- C++ SDK Guide
- Performance Tuning
- S3 Storage
- Distributed Index Server
- CDC and SCD
- Carbon as Spark's Datasource
- FAQs
Experimental Features
Some features are marked as experimental because the syntax/implementation might change in the future.
- Hybrid format table using Add Segment.
- Accelerating performance using MV on parquet/orc.
- Merge API for Spark DataFrame.
- Hive write for non-transactional table.
Integration
Other Technical Material
Fork and Contribute
This is an active open source project for everyone, and we are always open to people who want to use this system or contribute to it. This guide document introduce how to contribute to CarbonData.
Contact us
To get involved in CarbonData:
- First join by emailing to [email protected],then you can discuss issues by emailing to [email protected] or visit http://apache-carbondata-mailing-list-archive.1130556.n5.nabble.com
- Report issues on Apache Jira.
About
Apache CarbonData is an open source project of The Apache Software Foundation (ASF).
Note that the project description data, including the texts, logos, images, and/or trademarks,
for each open source project belongs to its rightful owner.
If you wish to add or remove any projects, please contact us at [email protected].