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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 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, globally-distributed deployments.

The core features of YugabyteDB include:

  • 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 transactions design is based on the Google Spanner architecture. Strongly consistency of writes is achieved by using Raft consensus for replication and cluster-wide distributed ACID transactions using hybrid logical clocks. *Snapshot * and serializable 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 a 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 in order 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 distributed backups, encryption of data at-rest, in-flight TLS encryption, change data capture, read replicas and others.

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 a number of 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 has been updated on July 22, 2020.

Current roadmap

Here is a list of some of the key features being worked on for the upcoming releases. Note that the YugabyteDB v2.2 release is expected around July 2020 was released July 15 2020 and the v2.3 release is expected in Nov 2020.

Feature Status Release Target Progress Comments
Support Liquibase, Flyway, ORM schema migrations PROGRESS v2.3
Online schema migration PROGRESS v2.3 Track YCQL already supports online schema changes
Support for most ALTER TABLE variants PROGRESS v2.3 Track
Database runtime activity monitoring PLANNING v2.3 Track Activity monitoring, audit logging, inactivity monitoring
Identity and access management in YSQL PLANNING v2.3 Track LDAP and Active Directory support
YSQL cluster administration features PLANNING v2.3 Track See currently active queries, find which queries are slow, slow query logging, etc.
Improving day 2 operations of Yugabyte Platform PROGRESS v2.3 Track
Row-level geo-partitioning PROGRESS v2.3 Track This feature will be done in two phases: supporting PostgreSQL partitions followed by geo-placement support for partitions
Improve TPC-C benchmarking PROGRESS v2.3 Track
Improvements to automatic tablet splitting PLANNING v2.3 Track
Support transactions with large batches of operations during data loads PLANNING Track
Transparently restart transactions PLANNING This should decrease the incidence of transaction restart errors seen in various scenarios

Planned additions to roadmap

The following items are being planned as additions to the roadmap

Feature Status Release Target Progress Comments
Improve YSQL query performance PLANNING Track
Make COLOCATED tables default for YSQL PLANNING Track
Point in time restores PLANNING Track
Support Kafka as source and sink PLANNING Support source and sink for both YSQL and YSQL
Follower reads in YSQL PLANNING Ability to perform follower reads for YSQL and transactional tables in YCQL. Note that this is currently supported for scenarios without distributed transactions.
Support for transactions in async xCluster replication PLANNING Track Apply transactions atomically on consumer cluster.

Recently released features

Feature Status Release Target Docs / Enhancements Comments
Online rebuild of indexes DONE v2.2 Docs coming soon. See pending enhancements
DEFERRED constraints in YSQL DONE v2.2 Docs coming soon. See pending enhancements.
COLOCATED tables GA DONE v2.2 Docs coming soon
Online schema migration framework DONE v2.2 Note that this is just the framework implementation. See planned enhancements in this area.
Distributed backups for transactional tables DONE v2.2 Docs coming soon. See pending enhancements.
IPV6 support for YugabyteDB DONE v2.2 Docs coming soon
Automatic tablet splitting BETA v2.2 Docs See further enhancements
Change data capture BETA This feature is currently available but in beta.
xCluster replication (async cross-cluster replication) DONE v2.1 Docs
Encryption of data at rest DONE v2.1 Docs

Architecture

YugabyteDB Architecture

Review detailed architecture in our Docs.

Need Help?

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.

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