concurrency

CS3402 Database Systems Tutorials CS3402 Concurrency Control: Question 1 Consider the following arrival order of operations to the scheduler. If the scheduler uses strict two phase locking to schedule the operations, modify the table below to show the new schedule. Ta Tb Tc Write(x) Read(y) Read(z) Read(x) Write(y) Write(x) Read(x) Commit Write(z) Commit Commit Question […]

CS3402 Database Systems Tutorials CS3402 Concurrency Control: Question 1 Consider the following arrival order of operations to the scheduler. If the scheduler uses strict two phase locking to schedule the operations, modify the table below to show the new schedule. Ta Tb Tc Write(x) Read(y) Read(z) Read(x) Write(y) Write(x) Read(x) Commit Write(z) Commit Commit Answer:

CS3402 1 CS3402 Chapter 10: Transactions Semester B, 2020/2021 Single-User versus Multiuser Systems  A DBMS is single-user if at most one user at a time can use the system, and it is multiuser if many users can use the system—and hence access the database—concurrently.  Single-user DBMSs are mostly restricted to personal computer systems;