openstack/openstack-manuals
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Merge "[config-ref] update 'raw' to 'flat' image back end"

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Jenkins 2017-02-09 16:44:10 +00:00 committed by Gerrit Code Review
commit aa57e3ab09
2 changed files with 3 additions and 3 deletions
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4
doc/config-reference/source/compute/hypervisor-kvm.rst
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@ -231,7 +231,7 @@ Backing Storage is the storage used to provide the expanded operating system
image, and any ephemeral storage. Inside the virtual machine, this is normally image, and any ephemeral storage. Inside the virtual machine, this is normally
presented as two virtual hard disks (for example, ``/dev/vda`` and ``/dev/vdb`` presented as two virtual hard disks (for example, ``/dev/vda`` and ``/dev/vdb``
respectively). However, inside OpenStack, this can be derived from one of respectively). However, inside OpenStack, this can be derived from one of
these methods: ``lvm``, ``qcow``, ``rbd`` or ``raw``, chosen using the these methods: ``lvm``, ``qcow``, ``rbd`` or ``flat``, chosen using the
``images_type`` option in ``nova.conf`` on the compute node. ``images_type`` option in ``nova.conf`` on the compute node.
QCOW is the default backing store. It uses a copy-on-write philosophy to delay QCOW is the default backing store. It uses a copy-on-write philosophy to delay
@ -239,7 +239,7 @@ allocation of storage until it is actually needed. This means that the space
required for the backing of an image can be significantly less on the real disk required for the backing of an image can be significantly less on the real disk
than what seems available in the virtual machine operating system. than what seems available in the virtual machine operating system.
RAW creates files without any sort of file formatting, effectively creating Flat creates files without any sort of file formatting, effectively creating
files with the plain binary one would normally see on a real disk. This can files with the plain binary one would normally see on a real disk. This can
increase performance, but means that the entire size of the virtual disk is increase performance, but means that the entire size of the virtual disk is
reserved on the physical disk. reserved on the physical disk.

2
doc/config-reference/source/compute/hypervisor-xen-libvirt.rst
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@ -144,7 +144,7 @@ Use the following as a guideline for configuring Xen for use in OpenStack:
The default for virtualization mode in nova is PV mode. The default for virtualization mode in nova is PV mode.
#. **Image formats**: Xen supports raw, qcow2 and vhd image formats. #. **Image formats**: Xen supports flat, qcow2 and vhd image formats.
For more information on image formats, refer to the `OpenStack Virtual For more information on image formats, refer to the `OpenStack Virtual
Image Guide <https://docs.openstack.org/image-guide/introduction.html>`__ Image Guide <https://docs.openstack.org/image-guide/introduction.html>`__
and the `Storage Options Guide on the Xen Project Wiki and the `Storage Options Guide on the Xen Project Wiki