Steffen Michels wrote:

Hi,

We are considering using the mdb.master3 branch of LMDB, but it is not clear to me whether the data.mdb format will remain stable. Is there a chance that another migration of all databases will be required in the future when switching now?

Yes. It is still unreleased because additional changes to the freelist format are planned, and possibly a few other changes.

In any case, mdb_dump/mdb_load will always work for migrating to a new version.

regards,

Steffen