1 1 vote Can a schedule ( s) be irrecoverable and conflict serializable at same time? Databases conflict-serializable concurrency + – Ashish Mishra 4 855 views answer comment Share Follow Print See 1 comment 1 1 comment reply Rupendra Choudhary commented Jun 14, 2017 reply Follow flag Why not. Lets take most simple case S: w1(A)R2(A)C2C1 Here schedule is irrecoverable as T2 read data item A that is written by some uncommitted T1 and commit before T1 commit. It's conflict serializable. 1 1 replyShare Please log in or register to add a comment.
2 2 votes for irrecoverable schedule there should be a dirty read and transaction who is reading commits first than transaction who wrote . while in case of conflict serializable schedule there should be not any cyclic conflicting relationship. consider an example given below Niraj Singh 2 answered Jun 19, 2017 Niraj Singh 2 comment Share Follow 0 reply Please log in or register to add a comment.