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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-3332) Provide an exactly-once Cassandra connector
Date Tue, 16 Feb 2016 10:32:18 GMT

    [ https://issues.apache.org/jira/browse/FLINK-3332?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15148415#comment-15148415

ASF GitHub Bot commented on FLINK-3332:

Github user rmetzger commented on a diff in the pull request:

    --- Diff: docs/apis/streaming/connectors/cassandra.md ---
    @@ -0,0 +1,100 @@
    +title: "Apache Cassandra Connector"
    +# Sub-level navigation
    +sub-nav-group: streaming
    +sub-nav-parent: connectors
    +sub-nav-pos: 1
    +sub-nav-title: Cassandra
    +Licensed to the Apache Software Foundation (ASF) under one
    +or more contributor license agreements.  See the NOTICE file
    +distributed with this work for additional information
    +regarding copyright ownership.  The ASF licenses this file
    +to you under the Apache License, Version 2.0 (the
    +"License"); you may not use this file except in compliance
    +with the License.  You may obtain a copy of the License at
    +  http://www.apache.org/licenses/LICENSE-2.0
    +Unless required by applicable law or agreed to in writing,
    +software distributed under the License is distributed on an
    +KIND, either express or implied.  See the License for the
    +specific language governing permissions and limitations
    +under the License.
    +This connector provides a sink that writes data into a [Cassandra](https://cassandra.apache.org/)
    +The Flink Cassandra sink integrates with Flink's checkpointing mechanism to provide
    +exactly-once processing semantics. To achieve that, Flink buffers incoming records
    +and commits them only when a checkpoint completes.
    +To use this connector, add the following dependency to your project:
    +{% highlight xml %}
    +  <groupId>org.apache.flink</groupId>
    +  <artifactId>flink-connector-cassandra{{ site.scala_version_suffix }}</artifactId>
    +  <version>{{site.version }}</version>
    +{% endhighlight %}
    +Note that the streaming connectors are currently not part of the binary distribution.
See how to link with them for cluster execution [here]({{ site.baseurl}}/apis/cluster_execution.html#linking-with-modules-not-contained-in-the-binary-distribution).
    +#### Installing RabbitMQ
    --- End diff --
    Installing RabbitMQ?

> Provide an exactly-once Cassandra connector
> -------------------------------------------
>                 Key: FLINK-3332
>                 URL: https://issues.apache.org/jira/browse/FLINK-3332
>             Project: Flink
>          Issue Type: Improvement
>          Components: Streaming Connectors
>            Reporter: Robert Metzger
>            Assignee: Chesnay Schepler
> With FLINK-3311, we are adding a Cassandra connector to Flink.
> It would be good to also provide an "exactly-once" C* connector.
> I would like to first discuss how we are going to implement this in Flink.

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