In-Memory

In-memory mode is useful for tests, demos, and fast local iteration.

It does not provide shared state across processes.

Registration

builder.Services.AddDurableStack(options =>
{
    options.UseInMemory();
    options.WorkerName = $"local-{Environment.ProcessId}";
});

import { createDurableStackInMemory } from "durablestack";

const { runtime } = await createDurableStackInMemory({
  workerName: `local-${process.pid}`
});

Behavior

• No external database required.
• Job/run state exists only in process memory.
• Data is lost on process restart.

Important limitations

• Not durable across restarts.
• Not valid for distributed multi-worker execution.
• Default run retention is 1 hour (vs 24 hours for durable DB providers).