Hot Restart and Persistent Memory Management

The HOT_RESTART feature provides support for rapidly reloading and reinitializing failed ChorusOS operating system actors, without accessing stable storage. Actors which benefit from this support are known as restartable actors. HOT_RESTART also provides all actors (not just restartable actors) with a means of storing persistent data, data which can persist beyond the lifetime of a run-time instance of an actor.

The main services exported by the HOT_RESTART feature are:

• An actor restart mechanism which detects crashes in restartable actors, and automatically restarts them from an actor image in persistent memory.

• Persistent memory allocation. Actors can allocate blocks of persistent memory to store data which will persist beyond the actor's lifetime.

• A site restart mechanism to restart the kernel, boot actors and all restartable actors on a system without accessing stable storage.

For more details, see HOT_RESTART(5FEA)