aphyr/riemann — pull request #102 by lwf (2013-01-03 12:55:34+00:00)
Title: Add delete-by stream primitive and test case

delete-by allows you to delete events from the index based on properties of the event. We use it to delete individual metrics (delete-by index [:host :service]) when we're performing upgrades but also to delete all metrics for a particular host when we retire hosts (delete-by index :host).