On Tuesday July 3, chris.mason@xxxxxxxxxx wrote: > > Getting a snapshot that is useful with respect to application data > requires help from the application. Certainly. > The app needs to be shutdown or > paused prior to the snapshot and then started up again after the > snapshot is taken. Alternately, the app needs to be able to cope with unexpected system shutdown (aka crash) and the same ability will allow it to cope with an atomic snapshot. It may be able to recover more efficiently from an expected shutdown, so being able to tell the app about an impending snapshot is probably a good idea, but it should be advisory only. NeilBrown - To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
