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What is YugabyteDB?

YugabyteDB is a high-performance, cloud-native, distributed SQL database that aims to support all PostgreSQL features. It is best suited for cloud-native OLTP (i.e., real-time, business-critical) applications that need absolute data correctness and require at least one of the following: scalability, high tolerance to failures, or globally-distributed deployments.

Core Features
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What's being worked on?
Architecture
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License
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Core Features

Powerful RDBMS capabilities Yugabyte SQL (YSQL for short) reuses the query layer of PostgreSQL (similar to Amazon Aurora PostgreSQL), thereby supporting most of its features (datatypes, queries, expressions, operators and functions, stored procedures, triggers, extensions, etc). Here is a detailed list of features currently supported by YSQL.
Distributed transactions The transaction design is based on the Google Spanner architecture. Strong consistency of writes is achieved by using Raft consensus for replication and cluster-wide distributed ACID transactions using hybrid logical clocks. Snapshot, serializable and read committed isolation levels are supported. Reads (queries) have strong consistency by default, but can be tuned dynamically to read from followers and read-replicas.
Continuous availability YugabyteDB is extremely resilient to common outages with native failover and repair. YugabyteDB can be configured to tolerate disk, node, zone, region, and cloud failures automatically. For a typical deployment where a YugabyteDB cluster is deployed in one region across multiple zones on a public cloud, the RPO is 0 (meaning no data is lost on failure) and the RTO is 3 seconds (meaning the data being served by the failed node is available in 3 seconds).
Horizontal scalability Scaling a YugabyteDB cluster to achieve more IOPS or data storage is as simple as adding nodes to the cluster.
Geo-distributed, multi-cloud YugabyteDB can be deployed in public clouds and natively inside Kubernetes. It supports deployments that span three or more fault domains, such as multi-zone, multi-region, and multi-cloud deployments. It also supports xCluster asynchronous replication with unidirectional master-slave and bidirectional multi-master configurations that can be leveraged in two-region deployments. To serve (stale) data with low latencies, read replicas are also a supported feature.
Multi API design The query layer of YugabyteDB is built to be extensible. Currently, YugabyteDB supports two distributed SQL APIs: Yugabyte SQL (YSQL), a fully relational API that re-uses query layer of PostgreSQL, and Yugabyte Cloud QL (YCQL), a semi-relational SQL-like API with documents/indexing support with Apache Cassandra QL roots.
100% open source YugabyteDB is fully open-source under the Apache 2.0 license. The open-source version has powerful enterprise features such as distributed backups, encryption of data-at-rest, in-flight TLS encryption, change data capture, read replicas, and more.

Get Started

Quick Start
Try running a real-world demo application:
- Microservices-oriented e-commerce app
- Streaming IoT app with Kafka and Spark Streaming

Cannot find what you are looking for? Have a question? Please post your questions or comments on our Community Slack or Forum.

Build Apps

YugabyteDB supports many languages and client drivers, including Java, Go, NodeJS, Python, and more. For a complete list, including examples, see Drivers and ORMs.

What's being worked on?

This section was last updated in July, 2024.

Current roadmap

Here is a list of some of the key features being worked on for the upcoming releases. The YugabyteDB v2024.1 release has been released in June, 2024.

Feature	Status	Progress	Comments
Upgrade to PostgreSQL v15	PROGRESS	Track	For latest features, new PostgreSQL extensions, performance, and community fixes
Support PostgreSQL Publication/Replication slot API in CDC	PROGRESS	Track	PostgreSQL has a huge community that needs a PG-compatible API to set up and consume database changes.
Bitmap scan support	PROGRESS	Track	Bitmap Scan support for using Index Scans, remote filter and enhance Cost Model.
YSQL-table statistics and cost based optimizer(CBO)	PROGRESS	Track	Improve YSQL query performance
YSQL parallel query execution	PROGRESS	Track	Devise query plans that can leverage multiple CPUs in order to answer queries faster.
YSQL-Feature support - ALTER TABLE	PROGRESS	Track	Support for various `ALTER TABLE` variants
Connection Management	PROGRESS	Track	Server side connection management

Recently released features

Feature	Status	Release Target	Docs / Enhancements	Comments
Support for transactions in async xCluster replication	✅ DONE	v2.19	Docs	Preserve and guarantee transactional atomicity and global ordering when propagating change data from one universe to another
Support wait-on-conflict concurrency control	✅ DONE	v2.19		Support wait-on-conflict concurrency control
Faster Bulk-Data Loading in YugabyteDB	✅ DONE	v2.15	Track	Faster Bulk-Data Loading in YugabyteDB
Change Data Capture	✅ DONE	v2.13		Change data capture (CDC) allows multiple downstream apps and services to consume the continuous and never-ending stream(s) of changes to Yugabyte databases
Support for materalized views	✅ DONE	v2.13	Docs	A materialized view is a pre-computed data set derived from a query specification and stored for later use
Geo-partitioning support for the transaction status table	✅ DONE	v2.13	Docs	Instead of central remote transaction execution metatda, it is now optimized for access from different regions. Since the transaction metadata is also geo partitioned, it eliminates the need for round-trip to remote regions to update transaction statuses.
Transparently restart transactions	✅ DONE	v2.13		Decrease the incidence of transaction restart errors seen in various scenarios
Row-level geo-partitioning	✅ DONE	v2.13	Docs	Row-level geo-partitioning allows fine-grained control over pinning data in a user table (at a per-row level) to geographic locations, thereby allowing the data residency to be managed at the table-row level.
YSQL-Support `GIN` indexes	✅ DONE	v2.11	Docs	Support for generalized inverted indexes for container data types like jsonb, tsvector, and array
YSQL-Collation Support	✅ DONE	v2.11	Docs	Allows specifying the sort order and character classification behavior of data per-column, or even per-operation according to language and country-specific rules
YSQL-Savepoint Support	✅ DONE	v2.11	Docs	Useful for implementing complex error recovery in multi-statement transaction
xCluster replication management through Platform	✅ DONE	v2.11	Docs
Spring Data YugabyteDB module	✅ DONE	v2.9	Track	Bridges the gap for learning the distributed SQL concepts with familiarity and ease of Spring Data APIs
Support Liquibase, Flyway, ORM schema migrations	✅ DONE	v2.9	Docs
Support `ALTER TABLE` add primary key	✅ DONE	v2.9	Track
YCQL-LDAP Support	✅ DONE	v2.8	Docs	support LDAP authentication in YCQL API
Platform Alerting and Notification	✅ DONE	v2.8	Docs	To get notified in real time about database alerts, user defined alert policies notify you when a performance metric rises above or falls below a threshold you set.
Platform API	✅ DONE	v2.8	Docs	Securely Deploy YugabyteDB Clusters Using Infrastructure-as-Code

Architecture

Review detailed architecture in our Docs.

Need Help?

You can ask questions, find answers, and help others on our Community Slack, Forum, Stack Overflow, as well as Twitter @Yugabyte
Please use GitHub issues to report issues or request new features.
To Troubleshoot YugabyteDB, cluser/node level issues, Please refer to Troubleshooting documentation

Contribute

As an open-source project with a strong focus on the user community, we welcome contributions as GitHub pull requests. See our Contributor Guides to get going. Discussions and RFCs for features happen on the design discussions section of our Forum.

License

Source code in this repository is variously licensed under the Apache License 2.0 and the Polyform Free Trial License 1.0.0. A copy of each license can be found in the licenses directory.

The build produces two sets of binaries:

The entire database with all its features (including the enterprise ones) are licensed under the Apache License 2.0
The binaries that contain -managed in the artifact and help run a managed service are licensed under the Polyform Free Trial License 1.0.0.

By default, the build options generate only the Apache License 2.0 binaries.

To see our updates, go to The Distributed SQL Blog.
For an in-depth design and the YugabyteDB architecture, see our design specs.
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