NewClient creates a new data client, with given server address & password, and use the given namespace.

NewCluster creates a new cluster, and pre-loading it with a client for each of the listed (and thus known) shards.

Client defines a data client, to connect to a 0-db server.

Cluster implements datastor.Cluster for clients which interface with 0-db server using redis protocol.

Shard implements datastor.Shard for 0-db clients, to make those clients work within a cluster of other 0-db clients.