Must be programmed into the M code

If the application is already structured to minimize logical transaction breakage problems, inserting the fencing commands may be a largely mechanical task. In less structured applications, inserting fences immediately "inside" the M LOCKs associated with transactions may provide an excellent first approximation of proper fencing.

Fencing adds some entries to the journal file(s)

Fencing may duplicate methods of recovery already established to address these issues

An application structured so that all information for each logical transaction is stored in a single global node (while other nodes hold only redundant information), permits rebuild programs to completely correct logical inconsistencies. With less restrictive designs, logical inconsistencies may be corrected manually or by using semi-automated techniques.