Storages

A Storage is a Zenoh router plugin that persists publications and serves them to future get() requests — with full location transparency.

Enabling a Storage

Add to your router configuration:

{
  plugins: {
    storage_manager: {
      volumes: {
        memory: {}  // in-memory backend (built-in)
      },
      storages: {
        temperature_store: {
          key_expr: "sensors/**/temperature",
          volume: "memory",
        }
      }
    }
  }
}

Architecture

The storage plugin intercepts publications flowing through the router and persists them. When a get() arrives, the plugin serves the stored values — all transparently through the same router.

Querying Stored Data

From any Zenoh application, query the stored data normally:

let replies = session.get("sensors/**/temperature").await.unwrap();
while let Ok(reply) = replies.recv_async().await {
    if let Ok(sample) = reply.result() {
        println!("{} = {:?}", sample.key_expr(), sample.payload());
    }
}

The application doesn't know (or care) whether the reply comes from:

• A live publisher
• A storage on an edge router
• A storage in the cloud

Storage Backends

Backends are loaded as plugins. See the eclipse-zenoh/zenoh-backend-* repositories for the full list.