<transcript><audio_72>the change and then depending upon how you're using those log records you could do one of different schemes but we record stuff to undo things so all you need to know now is yeah bad things can happen while you're making these changes that's the recovery stuff we'll start talking about where we'll keep track of</transcript><transcript><audio_73>logs to to uh be able to back ourselves out of some unsafe state if we started to make this change and things crashed in the middle what the transaction AB it right yeah good question all right so Delta storage is that transactions can recreate in all of these things</transcript><transcript><audio_74>transactions can recreate old values in the Tuple based schemes they just go to the tle and they get the whole thing here you can create old versions by applying the delta in the reverse order because it's creating it's keeping track of the Delta right even though it's not</transcript><transcript><audio_75>quite shown value is being changed it it'll say uh it might have some sort of a Delta associated with it and we'll talk about that from the logging perspective too but that notion of Delta is effectively the same now the minute you have versions</transcript> the change and then depending upon how you're using those log records you could do one of different schemes but we record stuff to undo things so all you need to know now is yeah bad things can happen while you're making these changes that's the recovery stuff we'll start talking about where we'll keep track of logs to to uh be able to back ourselves out of some unsafe state if we started to make this change and things crashed in the middle what the transaction AB it right yeah good question all right so Delta storage is that transactions can recreate in all of these things transactions can recreate old values in the Tuple based schemes they just go to the tle and they get the whole thing here you can create old versions by applying the delta in the reverse order because it's creating it's keeping track of the Delta right even though it's not quite shown value is being changed it it'll say uh it might have some sort of a Delta associated with it and we'll talk about that from the logging perspective too but that notion of Delta is effectively the same now the minute you have versions
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