Fundamentals

Splitgill is a versioned storage and search library. It is a management layer that sits on top of MongoDB and Elasticsearch to store data and track the versions of that data.

MongoDB provides the persistent, versioned storage, while Elasticsearch provides a searchable view on that versioned data.

A number of considerations are addressed by the Splitgill data model:

• the latest data needs to be searchable
• all versions of the data need to be searchable at any specific version
• as many of the powerful search features in ElasticSearch need to be available for users as possible
• changes in data type between versions of a field need to be supported
• the model should support efficient type querying to assist with searches
• the model should support all JSON types nested at any level
  • string
  • number
  • object
  • array
  • boolean
  • null