'Same transactions' diaporamas de présentation

Concurrency Control

Concurrency Control. Chapter 17. Modified by Donghui Zhang. Transactions. Concurrent execution of user programs is essential for good DBMS performance.

593 views • 41 slides

Concurrency Control

Concurrency Control. Transactions. A transaction is a list of actions. The actions are reads (written R T (O)) and writes (written W T (O)) of database objects. Example: T 1 : R(V), R(Y), W(V), W(C). Schedules.

636 views • 26 slides

Async XDS.b

Async XDS.b. Key Use Cases. Scenario 1: Async XDS allows for scenarios where actors are not simultaneously connected (off-line) making store-and-forward scenarios possible through the use of intermediaries.

396 views • 16 slides

The Nature of the Firm Coase, Ronald H.(1937) Economica , 4 (November): 386-405

1.77k views • 6 slides