2. Consider the timeline of the schedule shown below, T1 R (X) R(Y) T2 W (X)...

   

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2. Consider the timeline of the schedule shown below, T1 R (X) R(Y) T2 W (X) R(Z) R(Z) W(Y) R(Y) W(Y) C W (X) C a. Show the schedule after applying regular 2PL with read/write locks. If there is a deadlock indicate it, otherwise specify the equivalent serial schedule. (Note: in regular 2PL, unneeded locks are released as soon as the growing phase ends) b. Show the schedule after applying 2PL-Strict with read/write locks. If there is a deadlock indicate it, otherwise specify the equivalent serial schedule. c. Assume instead T1 aborts (replace e with a in the schedule above), apply 2PL and 2PL- strict and indicate what is the results for both cases (i.e., both transactions abort, or T2 commits). 2. Consider the timeline of the schedule shown below, T1 R (X) R(Y) T2 W (X) R(Z) R(Z) W(Y) R(Y) W(Y) C W (X) C a. Show the schedule after applying regular 2PL with read/write locks. If there is a deadlock indicate it, otherwise specify the equivalent serial schedule. (Note: in regular 2PL, unneeded locks are released as soon as the growing phase ends) b. Show the schedule after applying 2PL-Strict with read/write locks. If there is a deadlock indicate it, otherwise specify the equivalent serial schedule. c. Assume instead T1 aborts (replace e with a in the schedule above), apply 2PL and 2PL- strict and indicate what is the results for both cases (i.e., both transactions abort, or T2 commits).

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a Using readwrite locks in conjunction with standard twophase locking 2PL T1 RX Readingonly lock on ... View the full answer