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Transaction Management Overview

Transaction Management Overview

Transaction Management Overview. Chapter 18. Transactions. Concurrent execution of user programs is essential for good DBMS performance. Because disk accesses are frequent, and relatively slow, it is important to keep the cpu humming by working on several user programs concurrently.

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470 views • 47 slides
Transaction Management and Concurrency Control

Transaction Management and Concurrency Control

Transaction Management and Concurrency Control. Transactions. Concurrent execution of user programs is essential for good DBMS performance.

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1.34k views • 45 slides
Transactions Lecture 2 (BHG , Chap. 2)

Transactions Lecture 2 (BHG , Chap. 2)

Transactions Lecture 2 (BHG , Chap. 2). The formal foundation. Partial order. L=( ? , <), ? is the domain, < is a binary relation on ? that is: irreflexive, for all a ? ? , a ? a (i.e., a < a is false). transitive, for all a, b, c in ? , a < b and b < c implies a < c.

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540 views • 38 slides
Transactions Lecture 2 (BHG , Chap. 2)

Transactions Lecture 2 (BHG , Chap. 2)

Transactions Lecture 2 (BHG , Chap. 2). The formal foundation. Partial order. L=( ? , <), ? is the domain, < is a binary relation on ? that is: irreflexive, for all a ? ? , a ? a (i.e., a < a is false). transitive, for all a, b, c in ? , a < b and b < c implies a < c.

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468 views • 38 slides
Concurrency Control

Concurrency Control

Concurrency Control. Lecture 22 Ramakrishnan - Chapter 19. Review. DBMSs support concurrency, crash recovery with: ACID Transactions Log of operations A serial execution of transactions is safe but slow Try to find schedules equivalent to serial execution

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299 views • 19 slides
Concurrency Control

Concurrency Control

Concurrency Control. Chapter 17 Sections 17.1-17.4. Conflict Serializable Schedules. Two schedules are conflict equivalent if: Involve the same actions of the same transactions Every pair of conflicting actions is ordered the same way

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198 views • 13 slides

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