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Apache Flink Documentation

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Apache Flink Documentation

{{< center >}} Apache Flink is a framework and distributed processing engine for stateful computations over unbounded and bounded data streams. Flink has been designed to run in all common cluster environments, perform computations at in-memory speed and at any scale. {{< /center >}}

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If you're interested in playing around with Flink, try one of our tutorials:

  • [Flink SQL Tutorial]({{< ref "docs/getting-started/quickstart-sql" >}}) - Interactive queries with the SQL Client
  • [Table API Tutorial]({{< ref "docs/getting-started/table_api" >}}) - Declarative streaming with a relational API
  • [DataStream API Tutorial]({{< ref "docs/getting-started/datastream" >}}) - Imperative, event-driven stream processing
  • [Operations Playground]({{< ref "docs/getting-started/flink-operations-playground" >}}) - Explore Flink in Docker

  • To dive in deeper, the [Hands-on Training]({{< ref "docs/learn-flink/overview" >}}) includes a set of lessons and exercises that provide a step-by-step introduction to Flink.

  • The [Concepts]({{< ref "docs/concepts/overview" >}}) section explains what you need to know about Flink before exploring the reference documentation.

If you get stuck, check out our community support resources. In particular, Apache Flink’s user mailing list is consistently ranked as one of the most active of any Apache project, and is a great way to get help quickly.

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The reference documentation covers all the details. Some starting points:

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  • [Flink SQL]({{< ref "docs/sql/overview" >}})
  • [Table API]({{< ref "docs/dev/table/overview" >}})
  • [DataStream API]({{< ref "docs/dev/datastream/overview" >}})
  • [DataStream API (V2)]({{< ref "docs/dev/datastream-v2/overview" >}})

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  • [Configuration]({{< ref "docs/deployment/config" >}})
  • [REST API]({{< ref "docs/ops/rest_api" >}})
  • [CLI]({{< ref "docs/deployment/cli" >}}) {{< /columns >}}

Before putting your Flink job into production, read the [Production Readiness Checklist]({{< ref "docs/ops/production_ready" >}}). For an overview of possible deployment targets, see [Clusters and Deployments]({{< ref "docs/deployment/overview" >}}).

Release notes cover important changes between Flink versions. Please read them carefully if you plan to upgrade your Flink setup.

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See the release notes for [Flink 2.2]({{< ref "/release-notes/flink-2.2.md" >}}), [Flink 2.1]({{< ref "/release-notes/flink-2.1.md" >}}), [Flink 2.0]({{< ref "/release-notes/flink-2.0.md" >}}), [Flink 1.20]({{< ref "/release-notes/flink-1.20.md" >}}), [Flink 1.19]({{< ref "/release-notes/flink-1.19.md" >}}), [Flink 1.18]({{< ref "/release-notes/flink-1.18.md" >}}), [Flink 1.17]({{< ref "/release-notes/flink-1.17.md" >}}), [Flink 1.16]({{< ref "/release-notes/flink-1.16.md" >}}), [Flink 1.15]({{< ref "/release-notes/flink-1.15.md" >}}), [Flink 1.14]({{< ref "/release-notes/flink-1.14.md" >}}), [Flink 1.13]({{< ref "/release-notes/flink-1.13.md" >}}), [Flink 1.12]({{< ref "/release-notes/flink-1.12.md" >}}), [Flink 1.11]({{< ref "/release-notes/flink-1.11.md" >}}), [Flink 1.10]({{< ref "/release-notes/flink-1.10.md" >}}), [Flink 1.9]({{< ref "/release-notes/flink-1.9.md" >}}), [Flink 1.8]({{< ref "/release-notes/flink-1.8.md" >}}), or [Flink 1.7]({{< ref "/release-notes/flink-1.7.md" >}}).

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