``Libckpt: Transparent Checkpointing under Unix''

James S. Plank, Micah Beck, Gerry Kingsley, and Kai Li

Conference Proceedings, Usenix Winter 1995 Technical Conference, New Orleans, LA, January, 1995, pp. 213--223.


Checkpointing is a simple technique for rollback recovery: the state of an executing program is periodically saved to a disk file from which it can be recovered after a failure. While recent research has developed a collection of powerful techniques for minimizing the overhead of writing checkpoint files, checkpointing remains unavailable to most application developers. In this paper we describe libckpt, a portable checkpointing tool for Unix that implements all applicable performance optimizations which are reported in the literature. While libckpt can be used in a mode which is almost totally transparent to the programmer, it also supports the incorporation of user directives into the creation of checkpoints. This user-directed checkpointing is an innovation which is unique to our work.

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