Discovering Streamsets Data Collector (Part 1)

StreamSets Data Collector (https://streamsets.com/product/) is an Open Source lightweight and powerful engine that streams data in real time. It allows to configure data flows as pipelines through a web UI in few minutes. Among its many features, it makes possible to view real-time statistics and inspect data as it passes through the pipeline.

In the first part of this series I am going to show the installation steps to run the Data Collector manually. I am referring to the release 1.2.1.0. The latest one (1.2.2.0) comes with a bug that prevents it to start (I have opened a ticket in the official Jira for this product (https://issues.streamsets.com/browse/SDC-2657), but it is still unresolved at the time this post is written).

The prerequisites for the installation are:

OS: RedHat Enterprise Linux 6 or 7 or CentOS 6 or 7 or Ubuntu 14.04 or Mac OS X.
Java: Oracle or IBM JDK 7+.

And now the installation steps:
- Download the full StreamSets Data Collector tarball:
    wget https://archives.streamsets.com/datacollector/1.2.1.0/tarball/streamsets-datacollector-all-1.2.1.0.tgz
- and then extract its content into any desired location:
    tar xvf streamsets-datacollector-all-1.2.1.0.tgz
- Check the maximum number of open file descriptors for the hosting machine:
    ulimit -n
   If it is set to 1024 you need to increase it to 4096 at least updating the /etc/security/limits.conf file adding the following entry:
    <user_running_dc>    soft    nofile    4096
   and then logoff and login again.
- Run the Data Collector:
    $DATA_COLLECTOR_HOME/bin/streamsets dc
- Access the UI through a web browser at the following URL:
    http://<hostname>:18630/
   Now you are ready to start to create your first pipeline.

In order to stop the data collector just type Ctrl + C in the same shell from which you started it.

What's next?
In part 2 we will walk through the process of creating a new pipeline from scratch.

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