Spanner provides read-only transactions a snapshot view of data, using multiversion two-phase locking. a. In the centralized

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Spanner provides read-only transactions a snapshot view of data, using multiversion two-phase locking.

a. In the centralized multi-version 2PL scheme, read-only transactions never wait. But in Spanner, reads may have to wait. Explain why.

b. Using an older timestamp for the snapshot can reduce waits, but has some drawbacks. Explain why, and what the drawbacks are.

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Database System Concepts

ISBN: 9780078022159

7th Edition

Authors: Abraham Silberschatz, Henry F. Korth, S. Sudarshan

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Question Posted: Jun 13, 2022 06:41 AM

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Spanner provides read-only transactions a snapshot view of data, using multiversion two-phase locking. a. In the centralized

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a Unlike centralized commit which can be instantaneous c...View the full answer

Database System Concepts

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