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

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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2 Phase-Locking 2. Consider the timeline of the schedule shown below, T1 T2 R (X) R(Y) W (X) R(Z) R(Z) W (Y) R(Y) W (Y) W (X) 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 TI 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).
Transcribed Image Text:2 Phase-Locking 2. Consider the timeline of the schedule shown below, T1 T2 R (X) R(Y) W (X) R(Z) R(Z) W (Y) R(Y) W (Y) W (X) 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 TI 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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