Gregory Ashton authored 5 years ago and Moritz Huebner committed 5 years ago

1) Print the progress to STDOUT rather than STDERR - this will keep the
log file clean
2) Add SIGALRM to checkpoint signals
3) Change some logging messages to help diagnose checkpointing issues
4) Remove write current state when it has just been read
5) Improve documentation on how the periodic/reflective boundaries are
implemented

This reverts commit cba643d4