Apparatus and methods for fault-tolerant computing employing a daemon monitoring process and fault-tolerant library to provide varying degrees of fault tolerance

Abstract From the Canadian patent

Techniques for fault-tolerant computing without fault-tolerant hardware or operating, systems. The techniques employ a monitor daemon which is implemented as one or more user processes and a fault-tolerant library which can be bound into application, programs. A user process is made fault tolerant by registering it with the monitor, daemon. The degree of fault tolerance can be controlled by means of the fault-tolerant library. Included in the fault-tolerant library are functions which define, portions of a user process's memory as critical memory which copy the , critical, memory to persistent storage and which restore the critical memory from persistent, storage. The monitor daemon …