Combined NoSQL + full-text search
Teams requiring both wide-column NoSQL access patterns and full-text search on the same dataset without maintaining two separate systems (Cassandra + Elasticsearch independently).
Open Source Infrastructure
Projects maintained by InClouds
InClouds maintains open-source infrastructure projects with a focus on stability and production reliability. We do not chase upstream feature velocity — we patch, stabilize, and document what already works.
Active maintenance
Elassandra
Apache Cassandra with deeply embedded OpenSearch. A single distributed system that serves CQL queries and full-text search from the same node cluster.
The original project by Strapdata was deprecated. InClouds continues maintenance on the 4.0.x series — CVE patches, dependency updates, and compatibility fixes. No new features are added.
Technical specification
| Cassandra base | Apache Cassandra 4.0.x |
| Search integration | OpenSearch 1.3.x |
| Keyspace type | Wide-column + inverted index |
| Query interfaces | CQL + OpenSearch REST API |
| Consistency | Tunable: Cassandra quorum semantics |
| Replication | Gossip-based, RF-configurable |
| Maintenance stance | Stability-focused, CVE-patched |
| Feature policy | No upstream feature additions |
Version matrix
| Branch | Cassandra | OpenSearch | Status |
|---|---|---|---|
| elassandra-4.0.x | 4.0.x | 1.3.x | active |
| elassandra-3.11.x | 3.11.x | ES 7.x | eol |
Appropriate operational contexts
Elassandra is not a general recommendation. These are the specific scenarios where it remains the correct technical choice.
Migration continuity
Production deployments that depend on the original Elassandra project and require ongoing patch support without migrating to a Cassandra-only or OpenSearch-only architecture.
Operational simplicity
A single cluster handles both CQL queries and OpenSearch document indexing. No dual-write logic, no ETL pipeline, no index synchronization lag.
Maintenance policy
Stability-focused, not feature-chasing
The Elassandra maintenance branch at InClouds has an explicit policy: no new features are added. Releases contain security patches (CVEs), dependency updates, and bug fixes that affect correctness or stability.
Upstream Apache Cassandra 4.x and OpenSearch 1.3.x are tracked for security advisories. Compatibility fixes are applied only when they affect behavior visible to the application layer.
Teams requiring new OpenSearch query capabilities or Cassandra 5.x features should evaluate migration to separate clusters. InClouds does not plan a 5.x series.
# Release cadence (approximate)
Security patches: as-needed (CVE-driven)
Dependency bumps: quarterly
Bug fixes: on confirmed reproducible reports
Feature requests: not accepted
# Supported deployment topologies
Single datacenter: yes
Multi-datacenter: yes (Cassandra native)
Kubernetes: community maintained
Bare metal: yes
# Not supported
Elasticsearch 8.x API compatibility
Cassandra 5.x features
OpenSearch 2.x features
Commercial SLA or support contracts