1.1.1 Feature Services

ChorusOS hot restart comprises an API and run-time architecture which offer the following services:

• persistent memory allocation

  The hot restart API allows actors to allocate and free portions of persistent memory while they are executing. This service is available to all ChorusOS actors once hot restart is configured.

• actor restart

  With hot restart, the system is capable of detecting the abnormal termination of one or more actors and restarting them automatically from persistent memory. In addition, actors are organized into restart groups, enabling the simultaneous restart of all actors in a predefined group when a single actor in the group fails.

• site restart

  With hot restart, in addition to restarting one or more actors, the system is capable of restarting all restartable actors, plus the kernel and boot actors, for a given ChorusOS site.

The combination of these services provides a powerful framework for highly-available systems and applications, dramatically reducing the time it takes for a failed system or component to return to service.