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YugabyteDB


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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 to fit 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

  • 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.

Read more about YugabyteDB in our Docs.

Get Started

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 several languages and client drivers. Below is a brief list.

Language ORM YSQL Drivers YCQL Drivers
Java Spring/Hibernate PostgreSQL JDBC cassandra-driver-core-yb
Go Gorm pq gocql
NodeJS Sequelize pg cassandra-driver
Python SQLAlchemy psycopg2 yb-cassandra-driver
Ruby ActiveRecord pg yugabyte-ycql-driver
C# EntityFramework npgsql CassandraCSharpDriver
C++ Not tested libpqxx cassandra-cpp-driver
C Not tested libpq Not tested

What's being worked on?

This section was last updated in December, 2021.

Current roadmap

Here is a list of some of the key features being worked on for the upcoming releases (the YugabyteDB v2.11 latest release has been released in November, 2021, and the v2.8 stable release was released in October 2021).

Feature Status Release Target Progress Comments
Upgrade to PostgreSQL v13 PROGRESS v2.13 Track For latest features, new PostgreSQL extensions, performance, and community fixes
Change Data Capture PROGRESS v2.13 Track Allows multiple downstream apps and services to consume changes from YugabyteDB
Support for in-cluster PITR PROGRESS v2.13 Track Point in time recovery of YSQL databases, to a fixed point in time, across DDL and DML changes
Support for materalized views PROGRESS v2.13 Track Support create, drop, refresh materialized view
Geo-partitioning support for the transaction status table PROGRESS v2.13 Track Allows creating multiple transaction status tables
Automatic tablet splitting enabled by default PROGRESS v2.13 Track Enables changing the number of tablets (which are splits of data) at runtime.
YSQL-table statistics and cost based optimizer(CBO) PROGRESS v2.13 Track Improve YSQL query performance
YSQL-Feature support - ALTER TABLE PROGRESS v2.13 Track Support for various ALTER TABLE variants
YSQL-Online schema migration PROGRESS v2.13 Track Schema migrations(includes DDL operations) to be safely run concurrently with foreground operations
Row-level geo-partitioning PROGRESS v2.13 Track Enhance YSQL language support
Transparently restart transactions PROGRESS v2.13 Track Decrease the incidence of transaction restart errors seen in various scenarios
Pessimistic locking Design PROGRESS v2.13 Track
Make COLOCATED tables default for YSQL PLANNING Track
Support for transactions in async xCluster replication PLANNING Track Apply transactions atomically on consumer cluster.
Support for GiST indexes PLANNING Track Suppor for GiST (Generalized Search Tree) based index

Recently released features

Feature Status Release Target Docs / Enhancements Comments
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

YugabyteDB Architecture

Review detailed architecture in our Docs.

Need Help?

Contribute

As an 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.

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