About

Xapiand is a fast, simple and modern search and storage server built for the cloud. It features:

Liberal Open Source license:

MIT license (Note Xapian engine itself is GNU GPL).
You can find the source code for Xapiand at GitHub

HTTP RESTful API:

Document oriented.
No need for upfront schema definition.

Lightweight Engine:

Small footprint with very low memory usage.

Search Server:

Built on top of Xapian indexes.

Storage Server:

Each index also offers storage of files: à la Facebook’s Haystack ¹.

Support for query Aggregations:

Metrics aggregations.
Bucket aggregations.

Multi Tenant with Multi Types:

Support for more than one index.
Support for different types, one per index.
Index level configuration:
- Schema.

Efficient and Scalable architecture:

(Near) Real Time Search.
Event driven asynchronous architecture using libev.
Written in modern C++.

Geo-spatial support:

Uses the Hierarchical Triangular Mesh ² for indexing.
Accepts multiple Coordinate Reference Systems, including WGS84.
Implements EWKT.

High Availability:

Automatic node operation rerouting.
Replicas exists to maximize high availability and data locality.
Read and Search operations performed on any of the replicas.
Reliable, asynchronous replication for long term persistence.

Multi-Partitioning and Distribution Strategies:

Random Consistent Partitioning and Replication.

¹ Finding a needle in Haystack: Facebook’s photo storage.

² The Hierarchical Triangular Mesh.

Core Team

The Xapiand Core Team’s responsibility is to ensure the development and community around the Xapiand ecosystem thrive.