The trouble with timestamps

Some folks have asked whether Cassandra or Riak in last-write-wins mode are monotonically consistent, or whether they can guarantee read-your-writes, and so on. This is a fascinating question, and leads to all sorts of interesting properties about clocks and causality. There are two families of clocks in distributed systems. The first are often termed wall clocks, which correspond roughly to the t

[kuenishi]

if you want monotonic clock you should use clock_gettime(2) but Cassie looks she doesn't (probably due to performance?).