Comment 4 for bug 1505685

Reviewed: https://review.openstack.org/234339
Committed: https://git.openstack.org/cgit/openstack/ironic-python-agent/commit/?id=e320bb8942f6737969ed58e732de26bdcb528a84
Submitter: Jenkins
Branch: master

commit e320bb8942f6737969ed58e732de26bdcb528a84
Author: Lucas Alvares Gomes <email address hidden>
Date: Tue Oct 13 17:31:46 2015 +0100

    Add support for streaming raw images directly onto the disk

    This patch adds support for streaming a raw image directly onto the disk,
    that means no more time spent writing the image to a tmpfs partition prior
    to copying it to the disk. Checksum computation is also done as the image
    is being streamed. Streaming raw images is disabled by default, however
    this behavior can be enabled by passing a key called "stream_raw_images"
    with the value of True to the prepare_image() command of IPA.

    For non-raw images this may not be possible, not sure about all image
    file formats, but common types such as qcow2 requires random access to
    the image file in order to be converted to raw.

    Closes-Bug: #1505685
    Change-Id: Iddf67907bc9b54bbd3065a97064cb5a3602cfe18