Hey Jason, Would you prefer feedback on this email thread, or as a comment replying to the wiki post?
Kanak ---------------------------------------- > Date: Fri, 26 Sep 2014 17:50:01 -0700 > Subject: [DISCUSSION] Support dynamic config by Helix > From: [email protected] > To: [email protected] > > Hi, > > We are seeing a couple of use cases where an online service may need to > roll out a set of new configs in a coordinated way without bouncing the > service.Helix can be extended to support this. The basic idea is to > generalize ideal-state to support multi-dimensional mappings. Currently > Helix uses ideal-state to define the target mapping from a partition to the > placement and state of the partition (i.e. partition->(placement, state). > The mapping can be extended to support another attribute, say > config-version, so it would be partition->(placement, state, > config-version). Helix controller is then able to bring the system to the > target mappings in a coordinated way. I've drafted a high level design for > this: > > https://cwiki.apache.org/confluence/display/HELIX/Support+Dynamic+Config > > I'd appreciate any feedback. > > Thanks, > Jason
