`Home <index.html>`__ OpenStack-Ansible Installation Guide

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Appendix D: Tips and tricks
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Ansible forks
~~~~~~~~~~~~~

The default MaxSessions setting for the OpenSSH Daemon is 10. Each Ansible
fork makes use of a Session. By default, Ansible sets the number of forks to 5.
However, you can increase the number of forks used in order to improve deployment
performance in large environments.

This may be done on a permanent basis by adding the `forks`_ configuration
entry in ``ansible.cfg``, or for a particular playbook execution by using the
``--forks`` CLI parameter. For example, to execute the
``os-keystone-install.yml`` playbook using 10 forks:

.. code-block:: shell-session

    # openstack-ansible --forks 10 os-keystone-install.yml

.. _forks: http://docs.ansible.com/ansible/intro_configuration.html#forks

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