tree cd91faf9edd5f88f063197807aedfcde2788d41e
parent cd3de5a3f50f32d5103f2aa0cfad891e3bdcb261
author Jiajun Wang <1803880+jiajunwang@users.noreply.github.com> 1572291691 -0700
committer Jiajun Wang <1803880+jiajunwang@users.noreply.github.com> 1581107062 -0800

Adjust the replica rebalance calculating ordering to avoid static order. (#535)

* Adjust the replica rebalance calculating ordering to avoid static order.

The problem of a static order is that the same set of replicas will always be the ones that are moved or state transited during the rebalance.
This randomize won't change the algorithm's performance. But it will help the Helix to eliminate very unstable partitions.