<transcript><audio_146>uh better to just Mark a record has been deleted and then eventually it can get uh cleaned up or you can have a tombstone uh based approach to basically clean up this version with in a in a two-step process so again the details for this not material for the exam but I</transcript><transcript><audio_147>uh encourage you to read the textbook but up to here the key problem I do want you to know and we may ask you questions about that okay uh last piece over here just for</transcript><transcript><audio_148>those of you who have more curiosity is the there's an explosion in the combinations that you can achieve with all of these different ways what's my garbage collection what's my index doing is it pointing to a physical uh record ID or is it pointing to a logical record ID that I can create in one of many</transcript><transcript><audio_149>different ways uh including pointing to the primary index what's the protocol I use to protect the right objects right as versions are getting created I still need to protect that new version is getting created and you can do two-phase locking or optimistic concery control</transcript> uh better to just Mark a record has been deleted and then eventually it can get uh cleaned up or you can have a tombstone uh based approach to basically clean up this version with in a in a two-step process so again the details for this not material for the exam but I uh encourage you to read the textbook but up to here the key problem I do want you to know and we may ask you questions about that okay uh last piece over here just for those of you who have more curiosity is the there's an explosion in the combinations that you can achieve with all of these different ways what's my garbage collection what's my index doing is it pointing to a physical uh record ID or is it pointing to a logical record ID that I can create in one of many different ways uh including pointing to the primary index what's the protocol I use to protect the right objects right as versions are getting created I still need to protect that new version is getting created and you can do two-phase locking or optimistic concery control
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