tree 20b7fe25c6bfed6637c17d6920629199ca969455
parent 8db5dff95158eeebe6f9a2a045333b96f243cca7
author Jiang Yan Xu <yan@jxu.me> 1433193743 -0700
committer Jiang Yan Xu <yan@jxu.me> 1433193945 -0700

Add more scheduler metrics.

- Refactor the metrics variables to use a Metrics object nested in the scheduler to hold them.
- Add some essential scheduler metrics such as uptime and task lost/failed/finished, etc.