distributed snapshot algorithm inspired by http://research.microsoft.com/en-us/um/people/lamport/pubs/chandy.pdf http://research.microsoft.com/en-us/um/people/l

distributed snapshot algorithm inspired by http://research.microsoft.com/en-us/um/people/lamport/pubs/chandy.pdf http://research.microsoft.com/en-us/um/people/lamport/pubs/c...