53 lines
1.5 KiB
ReStructuredText
53 lines
1.5 KiB
ReStructuredText
===============================
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Manage Block Storage scheduling
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===============================
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As an administrative user, you have some control over which volume
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back end your volumes reside on. You can specify affinity or
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anti-affinity between two volumes. Affinity between volumes means
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that they are stored on the same back end, whereas anti-affinity
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means that they are stored on different back ends.
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For information on how to set up multiple back ends for Cinder,
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refer to the guide for `Configuring multiple-storage back ends
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<http://docs.openstack.org/admin-guide-cloud/blockstorage_multi_backend.html>`__.
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Example Usages
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~~~~~~~~~~~~~~
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#. Create new volume on the same back end as Volume_A:
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.. code-block:: console
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$ cinder create --hint same_host=Volume_A-UUID SIZE
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#. Create new volume on a different back end than Volume_A:
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.. code-block:: console
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$ cinder create --hint different_host=Volume_A-UUID SIZE
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#. Create new volume on the same back end as Volume_A and Volume_B:
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.. code-block:: console
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$ cinder create --hint same_host=Volume_A-UUID --hint same_host=Volume_B-UUID SIZE
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Or:
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.. code-block:: console
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$ cinder create --hint same_host="[Volume_A-UUID, Volume_B-UUID]" SIZE
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#. Create new volume on a different back end than both Volume_A and Volume_B:
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.. code-block:: console
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$ cinder create --hint different_host=Volume_A-UUID --hint different_host=Volume_B-UUID SIZE
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Or:
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.. code-block:: console
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$ cinder create --hint different_host="[Volume_A-UUID, Volume_B-UUID]" SIZE
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