# Lock Files (The Doorman) These files ensure that only **one** Elephant is in charge of the Depot at a given time and that he knows who else is in the room. ![[LockFileCreateRead]] ![[LockFileCreateSync]] ![[LockFileCreateWrite]] ![[LockFileAddToDataDirRead]] ![[LockFileAddToDataDirSync]] ![[LockFileAddToDataDirWrite]] ![[LockFileReCheckDataDirRead]]