Backup to be written
This should maybe go under "recipies" (or similar) rather than "analysis".
Deferred mirroring old, to be adapted or replaced
On top of that, a user can mirror his/her data by synchronizing it onto another server. The user thereby sends the root hash of his tree to a second server, which starts copying the missing objects. This is usually done with a delay of a few minutes to a few hours. Should the main server fail, the user only loses a few minutes or hours of his work, which is often acceptable.
This setup emerges naturally when people are working on different devices that are kept synchronized.
Note that mirroring and object scattering are orthogonal.