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CIS 720 Concurrency Control. Timestamp-based concurrency control Assign a timestamp ts(T) to each transaction T. Each data item x has two timestamps:

CIS 720 Concurrency Control. Timestamp-based concurrency control Assign a timestamp ts(T) to each transaction T. Each data item x has two timestamps:

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Concurrency III (Timestamps). Schedulers A scheduler takes requests from transactions for reads and writes, and decides if it is “OK” to allow them to.

Concurrency III (Timestamps). Schedulers A scheduler takes requests from transactions for reads and writes, and decides if it is “OK” to allow them to.

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CIS 720

CIS 720

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