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Solutions to the Fourth COSC 6360 Quiz for Fall 2012

Solutions to the Fourth COSC 6360 Quiz for Fall 2012. Jehan-François Pâris jfparis@uh.edu. RAID Part A. Consider a RAID level 6 array with ten disks. Which fraction of the array space can be occupied by data? (5 points) . Answer. Consider a RAID level 6 array with ten disks.

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To increase concurrency Commit soon To protect against failures Commit as late as possible

To increase concurrency Commit soon To protect against failures Commit as late as possible Analogy Real life actions | system transactions Goal is to: Maximize commitment of actions/transactions Minimize rollback Maximize concurrency Minimize blocking. Obstables

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