Which of the following is used to get back all the transactions back after rollback?

Related MCQs

•                      rollback requires the system to maintain additional information about the state of all the running transactions.
• Rollback of transactions is normally used to:
• A special redo-only log record < Ti, Xj, V1> is written to the log, where V1 is the value being restored to data item Xj during the rollback. These log records are sometimes called
•                      are used to ensure that transactions access each data item in order of the transactions’          if their accesses conflict.
• A concurrency-control policy such as this one leads to              performance since it forces transactions to wait for preceding transactions to finish before they can start.
• Each of a pair of transactions has read data that is written by the other, but there is no data written by both transactions, is referred to as
•                              rolls back all transactions that were incomplete at the time of crash.
• Which of the following is used to get all the columns of a table?
• In the                      phase, the system replays updates of all transactions by scanning the log forward from the last checkpoint.
• The                        policy, allows the system to write modified blocks to disk even if the transactions that made those modifications have not all committed.