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Concurrency Control

Concurrency Control. Mon. Tue. Wed. Thur. Fri. 9:00. Overview. TP mons. Log. Files &Buffers. B-tree. Jim Gray Microsoft, Gray @ Microsoft.com Andreas Reuter International University, Andreas.Reuter@i-u.de. 11:00. Faults. Lock Theory. ResMgr. COM+. Access Paths. 1:30.

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Chapter 15: Transactions

Chapter 15: Transactions. Transaction Concept Concurrent Executions Serializability Testing for Serializability. Transaction Concept. A transaction is a unit of program execution that accesses and possibly updates various data items. Two main issues to deal with:

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Accessing data

Accessing data. Transactions. Agenda. Questions from last class? Transactions concurrency Locking rollback. Transactions. 1+ SQL statements that are performed completely, or not at all ACID properties Atomic Consistent Isolation Durability Why develop these?. has. Customer.

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Concurrency Control

Chapter 15: Transactions

Accessing data