Cisco ACI - Node Stateful Vs Stateless reload

 

Aspect	Stateful Reload	Stateless Reload
Definition	Reload where process state is preserved using checkpoints	Reload where process starts fresh without any prior state
State Preservation	Yes – runtime state is saved to Persistent Storage Services (PSS)	No – process is restarted without retaining previous state
Recovery Speed	Faster – resumes from last known state	Slower – requires full reinitialization
System Impact	Minimal – seamless continuation of operations	Higher – may cause temporary disruption or delay
Use Case	Preferred for critical services needing quick recovery	Used when state cannot be preserved or process needs a clean start
Managed By	Persistent Storage Services (PSS)	System Manager
Example Scenario	Restarting a service with session data intact	Replacing a crashed process with a new instance