Checkpointing in CosMiC: a User-level Process Migration Environment

Bell Labs., Lucent Technol., Murray Hill, NJ
02/1999; DOI: 10.1109/PRFTS.1997.640146
Source: CiteSeer

ABSTRACT The CosMiC system is a user-level process migrationenvironment. Process migration is defined as the mechanism to checkpoint the state of an unfinished process, transfer the state from one machine to another, and resume process execution on the new machine. The main purposes of process migration are (1) to utilize the CPU power and balance load on all machines in an environment; (2) to provide faulttolerance by migrating a process from a failed machine to another machine. CosMiC provides an extensible architecture to allow an application to choose its own checkpointing mechanism. It is equipped with four checkpoint libraries, namely, libckp, libfcp, libft and libst. They provide different strategies for state saving and restoring. Libckp is a transparent checkpoint library, it checkpoints the entire process state. It requires minimum user involvement and no modifications to the source code. Libfcp is a file checkpoint library that saves and restores file contents. Libft is a critical ...

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