Hi Chris,

Could you please elaborate the expected behavior a little bit?
Helix supports changing the partition list now.
But application needs to define how data is transferred between different
partitions. For example, when the new partition replica is boot up, the
state transition logic can move data accordingly.
If you are using CRUSH algorithm, the existing partitions' placement should
be stable.
Best Regards,

On Mon, May 21, 2018 at 11:12 PM, Chris Lu <[EMAIL PROTECTED]> wrote: