elasticsearch Glossary of Terms

  • Posted on: 23 January 2014
  • By: oon

index: an index is like a database in relational database.

type: a type in like a table in relational database.

document: document is a JSON document which is stored in elasticsearch.

node: a node is a running instance of elasticsearch which belongs to a cluster.

cluster: a cluster consists of one or more nodes which share the same cluster name.

shard: a shard is a single Lucene instance. it is a low-level "worker" unit which is managed automatically by elasticsearch.