Comment 7 for bug 1330938

Reviewed: https://review.openstack.org/105459
Committed: https://git.openstack.org/cgit/stackforge/fuel-astute/commit/?id=741b4fa9b964d73d9ab8f2fbcf5bb02836c98da1
Submitter: Jenkins
Branch: stable/5.0

commit 741b4fa9b964d73d9ab8f2fbcf5bb02836c98da1
Author: Vladimir Sharshov <email address hidden>
Date: Mon Jun 30 13:56:42 2014 +0400

    Avoid high load for Cobbler TFTP when delete many nodes.

    Delete operation does not have limit for nodes, but it
    erase disks and reboot nodes after which they try to boot
    using network. Cobbler installed at master node provide
    ability to boot using network and have limited resources.

    To prevent high load for Cobbler this changes add two things:
    * split all nodes to groups (default - 10) which process
    in series;
    * wait some time (default - 10 sec) between such groups.

    Both of this parameters can be changed in config.

    Closes-Bug: #1330938
    Closes-Bug: #1339024

    Backport from 5.1

    Change-Id: I9c3af6e8ab3c7c610e31baa6e58ec86aae20708d