Jobs can be checkpointed/migrated/restarted

Checkpointing, Job Migration

• Condor checkpoints a job at regular intervals — saves state of a process (memory, CPU, IO, etc) to a file.
• Process can be restarted exactly as if it had never stopped.
• Jobs can be migrated to another machine, e.g., when owner returns.

Remote System Calls; File Transfer

• Access to IO files is through remote system calls — transfer of these files does not take place
• Execute binaries and checkpoint files transferred automatically as needed.