We've had point in time restore for quite some time. Backtrack is different. It moves you to a different point using the same instance. Since we don't do destru

We've had point in time restore for quite some time. Backtrack is different. It moves you to a different point using the same instance. Since we don't do destructive writes to blocks (it is log-structured storage), we can simply mark a portion of the log as "ignored". It is a server feature, not a UI enhancement.