- What is 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.
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 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 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 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.
- Install YugabyteDB
- Create a local cluster
- Connect and try out SQL commands
- Build an app using a PostgreSQL-compatible driver or ORM.
- Try running a real-world demo application:
YugabyteDB supports several languages and client drivers. Below is a brief list.
|Language||ORM||YSQL Drivers||YCQL Drivers|
|C||Not tested||libpq||Not tested|
What's being worked on?
This section was last updated in July, 2021.
Here is a list of some of the key features being worked on for the upcoming releases (the YugabyteDB v2.7 latest release has been released in May, 2021, and the v2.6 stable release was released in July 2021).
|Automatic tablet splitting enabled by default||PROGRESS||v2.6, v2.7||Track|
|Point in time Recovery||PROGRESS||v2.6, v2.7||Track|
|YSQL: table statistics and Cost based optimizer(CBO)||PROGRESS||v2.7||Track|
|[YSQL] Feature support - ALTER TABLE||PROGRESS||v2.6, v2.7||Track|
|[YSQL] Online schema migration||PROGRESS||v2.7||Track|
|[YSQL] Collation Support - support COLLATE option for text-based columns||PROGRESS||v2.7||Track|
|[YSQL] Support SAVEPOINT - Transaction Control Commands||PROGRESS||v2.7||Track|
|Spring Data YugabyteDB module||PROGRESS||v2.7||Track|
|[YCQL] LDAP Support for Yugabyte's YCQL API||PROGRESS||v2.7||Track|
|Incorporate PostgreSQL 12 features||PLANNING||v2.7||Track|
|Improving day 2 operations of Yugabyte Platform||PROGRESS||v2.7||Track|
|Row-level geo-partitioning||PROGRESS||v2.7||Track||Enhance YSQL language support|
|Improve TPC-C benchmarking||PROGRESS||v2.7||Track|
|Transparently restart transactions||PROGRESS||v2.7||Track||Decrease the incidence of transaction restart errors seen in various scenarios|
|Pessimistic locking Design||PROGRESS||v2.7||Track|
|Support Liquibase, Flyway, ORM schema migrations||PROGRESS||v2.7|
Planned additions to the roadmap
The following items are being planned as additions to the roadmap.
|Support Kafka as source and sink||PLANNING||Support source and sink for both YSQL and YCQL|
|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|
|Support Spark 3.x on YCQL API||v2.5, v2.6||Track|
|Identity and access management in YSQL||v2.5||Track||LDAP and Active Directory support|
|Follower reads in YSQL||v2.5||Issue||Ability to perform follower reads for YSQL and transactional tables in YCQL.|
|YSQL cluster administration features - Node-Level statistics||v2.5||Issue||Per-node view of currently active queries, find which queries are slow, what active connections are doing, etc.|
|Support loading large data sets into YSQL using
||v2.5||Issue||Improving transactions which have a very large number of operations, as well as provide various options to batch load data more efficiently|
|Database runtime activity monitoring||v2.5||Issue||Activity monitoring, audit logging, inactivity monitoring|
|Online rebuild of indexes||v2.2||Docs coming soon. See pending enhancements|
||v2.2||Docs coming soon. See pending enhancements.|
||v2.2||Docs coming soon|
|Online schema migration framework||v2.2||Note that this is just the framework implementation. See planned enhancements in this area.|
|Distributed backups for transactional tables||v2.2||Docs coming soon. See pending enhancements.|
|IPV6 support for YugabyteDB||v2.2||Docs coming soon|
|Automatic tablet splitting||v2.2||Docs||See further enhancements|
|Change data capture||This feature is currently available but in beta.|
|xCluster replication (async cross-cluster replication)||v2.1||Docs|
|Encryption of data at rest||v2.1||Docs|
Review detailed architecture in our Docs.
Please use GitHub issues to report issues.
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.
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
-managedin 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.