This stateless design means each function execution starts fresh, with no memory of previous runs. Any required data must be fetched from external storage or passed explicitly. While this may seem limiting, it ensures reliability and scalability. Stateless functions can be replicated endlessly without synchronization issues. This design simplifies concurrency and prevents hard-to-debug state corruption problems common in traditional servers.
Statelessness improves reliability and fault tolerance across distributed systems. Failures don’t corrupt shared memory.
This approach encourages better system design, pushing developers toward modular and scalable architectures.
Serverless functions do not retain memory between executions by default.
[Red Hat, redhat.com]