Condor can now read and write compressed checkpoints. This new functionality is provided in the libcondorzsyscall.a and libcondorzckpt.a libraries. By default, a checkpoint is written to a file on the local disk of the machine where the job was submitted. A checkpoint server is available to serve as a repository for checkpoints. Checkpointing Using the Condor checkpoint library without the remote system call functionality and outside of the Condor system is known as standalone mode checkpointing.
Remote system calls disabled.
A program need not be rewritten to take advantage of checkpointing. However, the checkpointing library provides several C entry points that allow for a program to control its own checkpointing behavior if needed. This function causes a checkpoint image to be written to disk. The program will continue to execute. This function causes a checkpoint image to be writtent to disk.