Backups you can afford to keep

Every backup is a whole world you can copy out and run — but a part of the world that has not changed since the last one is shared with it instead of copied, so a week of a 5 GB world costs about seven, not thirty-five. Taken the only way that is safe on a running server: saving flushed and paused for the length of the copy. Older ones thin out rather than vanish, a copy can go somewhere off the machine, and restoring is prepared and done on the next start — because a world cannot be swapped underneath a server that is playing.

Added

16 July 2026

Finished

3 September 2026