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LSN 1 2 3 4 5 6 7 8 LOG begin checkpoint (empty Transaction Table and Dirty Page Table) end checkpoint UPDATE: T1 writes P1
LSN 1 2 3 4 5 6 7 8 LOG begin checkpoint (empty Transaction Table and Dirty Page Table) end checkpoint UPDATE: T1 writes P1 UPDATE: T2 writes P4 UPDATE: T2 writes P3 ABORT: T1 CLR: TI, LSN 3 END: T1 xxx CRASH Xxx 1- At the end of the Analysis phase of recovery, draw the transaction table 2- Explain which update action will continue when the recovery is complete 3- explain how many new compensation log records are written while the undo phase recovery LSN 1 2 3 4 5 6 7 8 LOG begin checkpoint (empty Transaction Table and Dirty Page Table) end checkpoint UPDATE: T1 writes P1 UPDATE: T2 writes P4 UPDATE: T2 writes P3 ABORT: T1 CLR: TI, LSN 3 END: T1 xxx CRASH Xxx 1- At the end of the Analysis phase of recovery, draw the transaction table 2- Explain which update action will continue when the recovery is complete 3- explain how many new compensation log records are written while the undo phase recovery
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