Il gio 1 feb 2018, 22:43 Ivan Kelly <iv...@apache.org> ha scritto: > > 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. >
I remember one of my first questions as an user was about migrating away from FlatLM. We did not finish and so for some cases my customers decided to nuke the cluster and start a new one. > 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. > Sijie, I have tens of running BK clusters of my customers which are using FlatLM because it is the default. Most of them are very little clusters with 3 bookies. So I am ok with this move but I need a tool to migrate. Having the full cluster down can be a option for my cases so I think my customers will be happy even with a simple tool. Maybe we can have a tool which creates a new structure using a different base path so that is case of failure the cluster is not compromised. Enrico > -Ivan > -- -- Enrico Olivelli
