This is just notes on checkpointing options, both that exist for Condor and in other systems:

• HTCondor's standard universe: Links in a custom library that replaces system calls with wrapped versions so state can be saved; checkpoints (and restores) inside of a signal handler.
• DMTCP (Distributed MultiThreaded CheckPointing (See DmtcpCondor ): Uses ptrace(?)
• CRIU (Checkpoint/Restore In Userspace) - See also This LWN article : Some kernel changes
• BLCR (Berkeley Lab Checkpoint/Restart) : requires kernal changes
• c/r (Linux Checkpoint/Restart) - No news since 2010. LWN article
• CryoPID - No news since 2005
• Checkpointing -List of others, circa 2011
• OpenVZ - Check on. May be built on CRIU
• ZAP - Circa 2008