The write-ahead logging (WAL) protocol simply means that a. Writing of a data item should be done

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The write-ahead logging (WAL) protocol simply means that

a. Writing of a data item should be done ahead of any logging operation
b. The log record for an operation should be written before the actual data is written
c. All log records should be written before a new transaction begins execution
d. The log never needs to be written to disk.

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Fundamentals Of Database Systems

ISBN: 9780133970777

7th Edition

Authors: Ramez Elmasri, Shamkant Navathe

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