mirror of https://github.com/citusdata/citus.git
154 lines
6.3 KiB
Markdown
154 lines
6.3 KiB
Markdown
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[](https://travis-ci.org/citusdata/citus)
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[](https://slack.citusdata.com)
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[](https://docs.citusdata.com/)
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### What is Citus?
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* **Open-source** PostgreSQL extension (not a fork)
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* **Scalable** across multiple machines through sharding and replication
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* **Distributed** engine for query parallelization
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* **Database** designed to scale multi-tenant applications
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Citus is a distributed database that scales across commodity servers using transparent
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sharding and replication. Citus extends the underlying database rather than forking it,
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giving developers and enterprises the power and familiarity of a relational database. As
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an extension, Citus supports new PostgreSQL releases, and allows you to benefit from new
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features while maintaining compatibility with existing PostgreSQL tools.
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Citus serves many use cases. Two common ones are:
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1. [Multi-tenant database](https://www.citusdata.com/blog/2016/10/03/designing-your-saas-database-for-high-scalability):
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Most B2B applications already have the notion of a tenant /
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customer / account built into their data model. Citus allows you to scale out your
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transactional relational database to 100K+ tenants with minimal changes to your
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application.
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2. [Real-time analytics](https://www.citusdata.com/blog/2017/01/27/getting-started-with-github-events-data):
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Citus enables ingesting large volumes of data and running
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analytical queries on that data in human real-time. Example applications include analytic
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dashboards with subsecond response times and exploratory queries on unfolding events.
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To learn more, visit [citusdata.com](https://www.citusdata.com) and join
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the [mailing list](https://groups.google.com/forum/#!forum/citus-users) to
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stay on top of the latest developments.
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### Getting started with Citus
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The fastest way to get up and running is to create a Citus Cloud account. You can also setup a local Citus cluster with Docker.
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#### Citus Cloud
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Citus Cloud runs on top of AWS as a fully managed database as a service and has development plans available for getting started. You can provision a Citus Cloud account at [https://console.citusdata.com](https://console.citusdata.com/users/sign_up) and get started with just a few clicks.
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#### Local Citus Cluster
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If you're looking to get started locally, you can follow the following steps to get up and running.
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* Install Docker Community Edition and docker-compose
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* Mac:
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1. [Download](https://www.docker.com/community-edition#/download) and install Docker.
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2. Start Docker by clicking on the application’s icon.
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* Linux:
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```bash
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curl -sSL https://get.docker.com/ | sudo bash
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sudo usermod -aG docker $USER && newgrp docker
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sudo systemctl start docker
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sudo curl -L https://github.com/docker/compose/releases/download/1.11.1/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose
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sudo chmod +x /usr/local/bin/docker-compose
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```
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(This docker-compose version is fine for running Citus, or you can install the [latest version](https://github.com/docker/compose/releases/latest).)
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* Pull and start the docker images
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```bash
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wget https://raw.githubusercontent.com/citusdata/docker/master/docker-compose.yml
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docker-compose -p citus up -d
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```
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* Connect to the master database
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```bash
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docker exec -it citus_master psql -U postgres
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```
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* Follow the [first tutorial][tutorial] instructions
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* To shut the cluster down, run
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```bash
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docker-compose -p citus down
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```
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### Talk to Contributors and Learn More
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<table class="tg">
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<col width="45%">
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<col width="65%">
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<tr>
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<td>Documentation</td>
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<td>Try the <a
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href="https://docs.citusdata.com/en/stable/tutorials/multi-tenant-tutorial.html">Citus
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tutorial</a> for a hands-on introduction or <br/>the <a
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href="https://docs.citusdata.com">documentation</a> for
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a more comprehensive reference.</td>
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</tr>
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<tr>
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<td>Google Groups</td>
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<td>The <a
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href="https://groups.google.com/forum/#!forum/citus-users">Citus Google
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Group</a> is our place for detailed questions and discussions.</td>
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</tr>
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<tr>
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<td>Slack</td>
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<td>Chat with us in our community <a
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href="https://slack.citusdata.com">Slack channel</a>.</td>
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</tr>
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<tr>
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<td>Github Issues</td>
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<td>We track specific bug reports and feature requests on our <a
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href="https://github.com/citusdata/citus/issues">project
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issues</a>.</td>
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</tr>
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<tr>
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<td>Twitter</td>
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<td>Follow <a href="https://twitter.com/citusdata">@citusdata</a>
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for general updates and PostgreSQL scaling tips.</td>
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</tr>
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</table>
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### Contributing
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Citus is built on and of open source, and we welcome your contributions.
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The [CONTRIBUTING.md](CONTRIBUTING.md) file explains how to get started
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developing the Citus extension itself and our code quality guidelines.
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### Who is Using Citus?
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Citus is deployed in production by many customers, ranging from
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technology start-ups to large enterprises. Here are some examples:
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* [CloudFlare](https://www.cloudflare.com/) uses Citus to provide
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real-time analytics on 100 TBs of data from over 4 million customer
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websites. [Case
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Study](https://blog.cloudflare.com/scaling-out-postgresql-for-cloudflare-analytics-using-citusdb/)
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* [MixRank](https://mixrank.com/) uses Citus to efficiently collect
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and analyze vast amounts of data to allow inside B2B sales teams
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to find new customers. [Case
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Study](https://www.citusdata.com/solutions/case-studies/mixrank-case-study)
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* [Neustar](https://www.neustar.biz/) builds and maintains scalable
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ad-tech infrastructure that counts billions of events per day using
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Citus and HyperLogLog.
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* [Agari](https://www.agari.com/) uses Citus to secure more than
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85 percent of U.S. consumer emails on two 6-8 TB clusters. [Case
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Study](https://www.citusdata.com/solutions/case-studies/agari-case-study)
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* [Heap](https://heapanalytics.com/) uses Citus to run dynamic
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funnel, segmentation, and cohort queries across billions of users
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and tens of billions of events. [Watch
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Video](https://www.youtube.com/watch?v=NVl9_6J1G60&list=PLixnExCn6lRpP10ZlpJwx6AuU3XIgNWpL)
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___
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Copyright © 2012–2017 Citus Data, Inc.
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[faq]: https://www.citusdata.com/frequently-asked-questions
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[tutorial]: https://docs.citusdata.com/en/stable/tutorials/multi-tenant-tutorial.html
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