Cinder: volume-type

What's Volume Type?
In the context of Cinder, Volume Type is an abstraction of various properties of a volume. It is _NOT_ type of back-end storage although one can create one volume type that only certain back-end is able to serve.

In current Cinder's implementation, volume type is just a string/name: 0

mysql> desc volume_types;
+------------+--------------+------+-----+---------+----------------+
| Field      | Type         | Null | Key | Default | Extra          |
+------------+--------------+------+-----+---------+-------------
| created_at | datetime     | YES  |     | NULL    |                |
| updated_at | datetime     | YES  |     | NULL    |                |
| deleted_at | datetime     | YES  |     | NULL    |                |
| deleted    | tinyint(1)   | YES  |     | NULL    |                |
| id         | int(11)      | NO   | PRI | NULL    | auto_increment |
| name       | varchar(255) | YES  |     | NULL    |                |
+------------+--------------+------+-----+---------+----------------+

https://etherpad.openstack.org/grizzly-cinder-volumetypes