Terminology
Let's take a look at some of the terminology that Trove uses.
Datastore
Datastore is the term used for the RDBMS or NoSQL database that Trove can manage; it is nothing more than an abstraction of the underlying database engine, for example, MySQL, MongoDB, Percona, Couchbase, and so on.
Datastore version
This is linked to the datastore and defines a set of packages to be installed or already installed on an image. As an example, let's take MySQL 5.5. The datastore version will also link to a base image (operating system) that is stored in Glance.
The configuration parameters that can be modified are also dependent on the datastore and the datastore version.
Instance
An instance is an instantiation of a datastore version. It runs on OpenStack ...
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