removed dependency on six

converted to python3 (tested on 3.8.2)

make test case results more consistent between mac and linux

Redis: Use SETNX operation for atomic test and set to reduce number of transactions requried for syncing

Expect nodename rather than hostname in redis locks

Don't try to steal work from slow nodes since we don't yet have a way to kill the slow node automatically.

Merge pull request #14 from JensRantil/rm-unused-imports

link to Wiki

comments

BUGFIX: ls arguments were being ignored. broken in 19d83d5836e6360107d26747c10b61e9f94aee4e

Document that syncdir can use redis.

include cowdir files in ls

reduce is a barrier even if not preceded by a shuffle

remove dead code

add more handling for race conditions on shared data directories