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.. _dars:
Data Analytics Reference Stack
##############################
This guide explains how to use the :abbr:`DARS (Data Analytics Reference Stack)`,
and to optionally build your own DARS container image.
Any system that supports Docker\* containers can be used with DARS. This steps
in this guide use |CL-ATTR| as the host system.
.. contents::
:local:
:depth: 1
The Data Analytics Reference Stack release
******************************************
The Data Analytics Reference Stack (DARS) provides developers and enterprises a straightforward, highly optimized software stack for storing and processing large
amounts of data. More detail is available on the
`DARS architecture and performance benchmarks`_.
The Data Analytics Reference Stack provides two pre-built Docker images,
available on `Docker Hub`_:
* A |CL|-derived `DARS with OpenBlas`_ stack optimized for `OpenBLAS`_
* A |CL|-derived `DARS with Intel® MKL`_ stack optimized for `MKL`_
We recommend you view the latest component versions for each image in the
:file:`README` found in the `Data Analytics Reference Stack`_ GitHub\*
repository. Because |CL| is a rolling distribution, the package version numbers
in the |CL|-based containers may not be the latest released by |CL|.
.. note::
The Data Analytics Reference Stack is a collective work, and each piece
of software within the work has its own license. Please see the
`DARS Terms of Use`_ for more details about licensing and usage of the Data
Analytics Reference Stack.
Using the Docker images
***********************
#. To immediately start using the latest stable DARS images, pull an image
directly from `Docker Hub`_. This example uses the
`DARS with Intel® MKL`_ Docker image.
#. Once you have downloaded the image, you can run it with
.. code-block:: bash
docker run -it --ulimit nofile=1000000:1000000 --name mkl <name of image>
This will launch the image and drop you into a bash shell inside the
container. You will see output similar to the following:
.. code-block:: console
root@fd5155b89857 /root # spark-shell
spark-shell
Config directory: /usr/share/defaults/spark/
Welcome to
____ __
/ __/__ ___ _____/ /__
_\ \/ _ \/ _ `/ __/ '_/
/___/ .__/\_,_/_/ /_/\_\ version 2.4.0
/_/
Using Scala version 2.12.7 (OpenJDK 64-Bit Server VM, Java 1.8.0-internal)
Type in expressions to have them evaluated.
Type :help for more information.
scala>
The :command:`--ulimit nofile` parameter is currently required in order to
increase the number of open files opened at certain point by the spark
engine.
Building DARS images
********************
If you choose to build your own DARS container images, you can customize
them as needed. Use the provided Dockerfile as a baseline.
To construct images with |CL|, start with a |CL| development platform that
has the :command:`containers-basic-dev` bundle installed. Learn more about
bundles and installing them by using :ref:`swupd-guide`.
#. Clone the `Data Analytics Reference Stack`_ GitHub\* repository.
.. code-block:: bash
git clone https://github.com/clearlinux/dockerfiles/tree/master/stacks/dars -b master
#. Inside the DARS directory, run :command:`make` to build OpenBLAS and MKL images.
.. code-block:: bash
make
Run :command:`make baseline` to build the baseline CentOS image. Depending on
the system, it may take a while to finish building.
.. code-block:: bash
make baseline
#. Once completed, check the resulting images with :command:`Docker`
.. code-block:: bash
docker images | grep dars
#. You can use any of the resulting images to launch fully functional containers.
If you need to customize the containers, you can edit the provided :file:`Dockerfile`.
.. _Data Analytics Reference Stack: https://github.com/clearlinux/dockerfiles/tree/master/stacks/dars
.. _Docker Hub: https://hub.docker.com/
.. _OpenBLAS: http://www.openblas.net/
.. _MKL: https://software.intel.com/en-us/mkl
.. _CentOS: https://www.centos.org/
.. _DARS with OpenBLAS: https://hub.docker.com/r/clearlinux/stacks-dars-openblas/
.. _DARS with Intel® MKL: https://hub.docker.com/r/clearlinux/stacks-dars-mkl/
.. _DARS architecture and performance benchmarks: https://clearlinux.org/stacks/data-analytics-stack-v1
.. _DARS Terms of Use: https://clearlinux.org/stacks/data-analytics/terms-of-use