Skip to main content

Shared Database

Flux Shared DB is a decentralized, persistent database service built on FluxCloud. It bundles standard DB engines with a custom “operator” that:

  1. Discovers peers via FluxCloud
  2. Forms a Master‑Slave cluster
  3. Exposes a native DB interface on port 3307

Overview​

  • High‑Availability Cluster
    Replicates automatically across ≥3 FluxNodes. No single point of failure.
  • Master‑Slave Replication
    • Master handles writes, stamps and sequences them.
    • Slaves replicate the Master’s data.
    • Reads served locally by any node.
  • Scalability & Fault Tolerance
    • Reads scale horizontally with added nodes.
    • Writes remain globally ordered by the Master.

Figure: Cluster architecture
Clients connect on port 3307; Master sequences writes (red) and replicates to Slaves; any node can serve reads (green).

Supported Engines​

  • ✅ MySQL (fully supported)
  • 🚧 MongoDB (in progress)
  • 🚧 PostgreSQL (in progress)

How To Deploy​

  1. Sign in at cloud.runonflux.com → Register New Application
  2. Complete, in order:
  • Details
  • Component
  • Review