Abstract
A design is presented for the storage component of a
self-recovering distributed operating system. This component consists of
an object manager, which maintains objects on main memory and on the
disk, and a recovery layer, which incorporates a collection of highly
optimized algorithms based on optimistic recovery. With optimistic
recovery it is possible for a machine (or collection of machines) to
present a fault-free interface to programs running on it (or them),
making all data appear to be persistent. The optimizations presented
make it possible to do this at a cost no higher than that of transaction
systems
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