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bigchaindb/docs/root/source/terminology.md
Krish ea6ce5c1a1 Single node/cluster bootstrap and node addition workflow in k8s (#1278) 
* Combining configs
*  Combining the persistent volume claims into a single file.
*  Combining the storage classes into a single file.

* Updating documentation

* Multiple changes
*  Support for ConfigMap
*  Custom MongoDB container for BigchainDB
*  Update documentation to run a single node on k8s

* Additional documentation

* Documentation to add a node to an existing BigchainDB cluster

* Commit on rolling upgrades

* Fixing minor documentation mistakes

* Documentation updates as per @ttmc's comments

* Block formatting error

* Change in ConfigMap yaml config
2017-03-15 16:22:49 +01:00

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Terminology

There is some specialized terminology associated with BigchainDB. To get started, you should at least know what what we mean by a BigchainDB node, cluster and federation.

Node

A BigchainDB node is a machine or set of closely-linked machines running RethinkDB/MongoDB Server, BigchainDB Server, and related software. (A "machine" might be a bare-metal server, a virtual machine or a container.) Each node is controlled by one person or organization.

Cluster

A set of BigchainDB nodes can connect to each other to form a cluster. Each node in the cluster runs the same software. A cluster contains one logical RethinkDB datastore. A cluster may have additional machines to do things such as cluster monitoring.

Federation

The people and organizations that run the nodes in a cluster belong to a federation (i.e. another organization). A federation must have some sort of governance structure to make decisions. If a cluster is run by a single company, then the federation is just that company.

What's the Difference Between a Cluster and a Federation?

A cluster is just a bunch of connected nodes. A federation is an organization which has a cluster, and where each node in the cluster has a different operator. Confusingly, we sometimes call a federation's cluster its "federation." You can probably tell what we mean from context.