openstack/openstack-manuals
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Merge "Dell SC: QOS, Data reduction and fault domain"

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Jenkins 2017-01-16 01:17:09 +00:00 committed by Gerrit Code Review
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doc/config-reference/source/block-storage/drivers/dell-storagecenter-driver.rst
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@ -123,6 +123,39 @@ To create a volume type that enables replication using Live Volume:
$ openstack volume type key --property replication_enabled='<is> True' "ReplicationType"
$ openstack volume type key --property replication:livevolume='<is> True' "ReplicationType"
If QOS options are enabled on the Storage Center they can be enabled via extra
specs. The name of the Volume QOS can be specified via the
``storagetype:volumeqos`` extra spec. Likewise the name of the Group QOS to
use can be specificed via the ``storagetype:groupqos`` extra spec. Volumes
created with these extra specs set will be added to the specified QOS groups.
To create a volume type that sets both Volume and Group QOS:
.. code-block:: console
$ openstack volume type create "StorageCenterQOS"
$ openstack volume type key --property 'storagetype:volumeqos'='unlimited' "StorageCenterQOS"
$ openstack volume type key --property 'storagetype:groupqos'='limited' "StorageCenterQOS"
Data reduction profiles can be specified in the
``storagetype:datareductionprofile`` extra spec. Available options are None,
Compression, and Deduplication. Note that not all options are available on
every Storage Center.
To create volume types that support no compression, compression, and
deduplication and compression respectively:
.. code-block:: console
$ openstack volume type create "NoCompressionType"
$ openstack volume type key --property 'storagetype:datareductionprofile'='None' "NoCompressionType"
$ openstack volume type create "CompressedType"
$ openstack volume type key --property 'storagetype:datareductionprofile'='Compression' "CompressedType"
$ openstack volume type create "DedupType"
$ openstack volume type key --property 'storagetype:datareductionprofile'='Deduplication' "DedupType"
Note: The default is no compression.
iSCSI configuration
~~~~~~~~~~~~~~~~~~~
@ -298,6 +331,27 @@ Note that this server definition is created once. Changing this setting after
the fact will not change an existing definition. The selected Server OS does
not have to match the actual OS used on the node.
Excluding a domain
~~~~~~~~~~~~~~~~~~
This option excludes a Storage Center ISCSI fault domain from the ISCSI
properties returned by the initialize_connection call. This only applies to
the ISCSI driver.
Add the excluded_domain_ip option into the backend config for each fault domain
to be excluded. This option takes the specified Target IPv4 Address listed
under the fault domain. Older versions of DSM (EM) may list this as the Well
Known IP Address.
Add the following to the back-end specification to exclude the domains at
172.20.25.15 and 172.20.26.15.
.. code-block:: ini
[dell]
excluded_domain_ip=172.20.25.15
excluded_domain_ip=172.20.26.15
Driver options
~~~~~~~~~~~~~~