Description of storage configuration options

Configuration option = Default value	Description
[DEFAULT]
allocated_capacity_weight_multiplier = -1.0	(FloatOpt) Multiplier used for weighing volume capacity. Negative numbers mean to stack vs spread.
capacity_weight_multiplier = 1.0	(FloatOpt) Multiplier used for weighing volume capacity. Negative numbers mean to stack vs spread.
enabled_backends = None	(ListOpt) A list of backend names to use. These backend names should be backed by a unique [CONFIG] group with its options
iscsi_helper = tgtadm	(StrOpt) iSCSI target user-land tool to use. tgtadm is default, use lioadm for LIO iSCSI support, iseradm for the ISER protocol, or fake for testing.
iscsi_iotype = fileio	(StrOpt) Sets the behavior of the iSCSI target to either perform blockio or fileio optionally, auto can be set and Cinder will autodetect type of backing device
iscsi_ip_address = $my_ip	(StrOpt) The IP address that the iSCSI daemon is listening on
iscsi_num_targets = 100	(IntOpt) The maximum number of iSCSI target IDs per host
iscsi_port = 3260	(IntOpt) The port that the iSCSI daemon is listening on
iscsi_target_prefix = iqn.2010-10.org.openstack:	(StrOpt) Prefix for iSCSI volumes
iscsi_write_cache = on	(StrOpt) Sets the behavior of the iSCSI target to either perform write-back(on) or write-through(off). This parameter is valid if iscsi_helper is set to tgtadm or iseradm.
iser_helper = tgtadm	(StrOpt) The name of the iSER target user-land tool to use
iser_ip_address = $my_ip	(StrOpt) The IP address that the iSER daemon is listening on
iser_num_targets = 100	(IntOpt) The maximum number of iSER target IDs per host
iser_port = 3260	(IntOpt) The port that the iSER daemon is listening on
iser_target_prefix = iqn.2010-10.org.iser.openstack:	(StrOpt) Prefix for iSER volumes
max_gigabytes = 10000	(IntOpt) This configure option has been deprecated along with the SimpleScheduler. New scheduler is able to gather capacity information for each host, thus setting the maximum number of volume gigabytes for host is no longer needed. It's safe to remove this configure from cinder.conf.
migration_create_volume_timeout_secs = 300	(IntOpt) Timeout for creating the volume to migrate to when performing volume migration (seconds)
num_iser_scan_tries = 3	(IntOpt) The maximum number of times to rescan iSER targetto find volume
num_volume_device_scan_tries = 3	(IntOpt) The maximum number of times to rescan targets to find volume
volume_backend_name = None	(StrOpt) The backend name for a given driver implementation
volume_clear = zero	(StrOpt) Method used to wipe old volumes (valid options are: none, zero, shred)
volume_clear_ionice = None	(StrOpt) The flag to pass to ionice to alter the i/o priority of the process used to zero a volume after deletion, for example "-c3" for idle only priority.
volume_clear_size = 0	(IntOpt) Size in MiB to wipe at start of old volumes. 0 => all
volume_copy_blkio_cgroup_name = cinder-volume-copy	(StrOpt) The blkio cgroup name to be used to limit bandwidth of volume copy
volume_copy_bps_limit = 0	(IntOpt) The upper limit of bandwidth of volume copy. 0 => unlimited
volume_dd_blocksize = 1M	(StrOpt) The default block size used when copying/clearing volumes
volume_driver = cinder.volume.drivers.lvm.LVMISCSIDriver	(StrOpt) Driver to use for volume creation
volume_manager = cinder.volume.manager.VolumeManager	(StrOpt) Full class name for the Manager for volume
volume_service_inithost_offload = False	(BoolOpt) Offload pending volume delete during volume service startup
volume_usage_audit_period = month	(StrOpt) Time period for which to generate volume usages. The options are hour, day, month, or year.
volumes_dir = $state_path/volumes	(StrOpt) Volume configuration file storage directory