Question: Using the following execution shown below, explain what is done in each of the ARIES recovery algorithm phases: LSN LOG 00 begin_checkpoint 10 end_checkpoint 20

Using the following execution shown below, explain what is done in each of the ARIES recovery algorithm phases:

LSN LOG
00 begin_checkpoint
10 end_checkpoint
20 update: T1 writes P1
30 update: T2 writes P2
40 update: T3 writes P3
50 T2 commit
60 update: T3 writes P2
70 T2 end
80 update: T1 writes P5
90 T3 abort
CRASH, RESTART

In addition to the execution shown here, the system crashes during recovery after writing two log records to stable storage and again after writing another two log records.

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