Describe howthe two-phase commit protocol can be expanded to deal with a cohort site that uses a timestamp-ordered concurrency control.
What will be an ideal response?
The protocol described in the text assumes that cohorts use strict two-phase locking controls and hence that transactions are serialized in commit order. In order to achieve serialization in commit order, when a site using a time-stamp ordered concurrency control receives a prepare message for a transaction T, it checks to see whether T has a time-stamp later than all committed or prepared subtransactions. If so, it votes
ready; if not it votes aborting.
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The formal process of deciding which fields should be grouped together into which fields is called ________
Fill in the blank(s) with correct word
To create a Word outline, start a new document in Word, click the ____ tab, and then click the Outline button in the Views group.
A. View B. Document C. Object D. Item
How does the logical process of combining bits known as ANDing work?
What will be an ideal response?
Match each of the following terms to its best description:I.One-variable data tableII.Two-variable data tableIII.Goal SeekIV.Scenario ManagerV.SolverA. A structured range that contains different values for one variable to compare how these values affect one or more calculated resultsB.Finds the best way to optimize values within specified constraints.C.A structured range that contains different values for two variables to compare how these differing values affect the results for one calculated value.D.Solves for a desired result of a formula by changing values E.Sets up and compares multiple situations
Fill in the blank(s) with the appropriate word(s).