The major concern was about id generation. Yes if you take the cluster down, you can do it easily. But it is not really useful then. So my take is not to support it at all. It is not worth spending time and energy on it.
Sijie On Thu, Feb 1, 2018 at 1:43 PM Ivan Kelly <iv...@apache.org> wrote: > > well I don't think it is an easy effort to upgrade from flat ledger > manager > > to hierarchical ledger manager. There was a huge long discussion about > this > > migration 2-3 years ago. > > Do you recall where the discussion was? JIRA or ML? Superficially it > seems like a simple operation if the cluster is taken down while it is > happening. > > -Ivan >
