openstack/openstack-manuals
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Merge "Clarified and added more information on storage drivers."

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doc/install-guide/ch_cinder.xml
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xml:id="ch_cinder">
<title>Add the Block Storage service</title>
<para>The OpenStack Block Storage service provides block storage devices
to instances using various backends. The Block Storage API and scheduler
services run on the controller node and the volume service runs on one
or more storage nodes. Storage nodes provide volumes to instances using
local block storage devices or SAN/NAS backends with the appropriate
drivers. For more information, see the
<link xlink:href="http://docs.openstack.org/juno/config-reference/content/section_volume-drivers.html"
><citetitle>Configuration Reference</citetitle></link>.</para>
to guest instances. The method in which the storage is provisioned and
consumed is determined by the Block Storage driver, or drivers
in the case of a multi-backend configuration. There are a variety of
drivers that are available: NAS/SAN, NFS, iSCSI, Ceph, and more.
The Block Storage API and scheduler services typically run on the controller
nodes. Depending upon the drivers used, the volume service can run
on controllers, compute nodes, or standalone storage nodes.
For more information, see the
<link xlink:href="http://docs.openstack.org/juno/config-reference/content/section_volume-drivers.html">
<citetitle>Configuration Reference</citetitle></link>.</para>
<note>
<para>This chapter omits the backup manager because it depends on the
Object Storage service.</para>