ReferenceResearch tree
Era 4 · Series BExpand and contract
A schema change adds the new shape, backfills, then drops the old one: no table lock, so a migration can never stall writes.
Prerequisites#
Research these first: Online schema migrations.
A schema change adds the new shape, backfills, then drops the old one: no table lock, so a migration can never stall writes.
Research these first: Online schema migrations.