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.. _glance-rbd:

.. list-table:: Description of RADOS Block Devices (RBD) configuration options
   :header-rows: 1
   :class: config-ref-table

   * - Configuration option = Default value
     - Description
   * - **[glance_store]**
     -
   * - ``rados_connect_timeout`` = ``0``
     - (Integer) Timeout value (in seconds) used when connecting to ceph cluster. If value <= 0, no timeout is set and default librados value is used.
   * - ``rbd_store_ceph_conf`` = ``/etc/ceph/ceph.conf``
     - (String) Ceph configuration file path. If <None>, librados will locate the default config. If using cephx authentication, this file should include a reference to the right keyring in a client.<USER> section
   * - ``rbd_store_chunk_size`` = ``8``
     - (Integer) RADOS images will be chunked into objects of this size (in megabytes). For best performance, this should be a power of two.
   * - ``rbd_store_pool`` = ``images``
     - (String) RADOS pool in which images are stored.
   * - ``rbd_store_user`` = ``None``
     - (String) RADOS user to authenticate as (only applicable if using Cephx. If <None>, a default will be chosen based on the client. section in rbd_store_ceph_conf)