An airlines reservation system has demanding performance and availability standards. Do the following play a role in enhancing performance? Do they enhance availability? Explain your answers.
a. Page cache
b. Log buffer
c. Checkpoint record
d. Physiological logging
e. Mirrored disk
a. Enhances performance (page I/O avoided), not availability
b. Enhances performance (page I/O avoided), not availability
c. Enhances availability (recovery is speeded up), not performance
d. Enhances performance slightly (log records are smaller), but executing logical operations during recovery might increase recovery time
e. Enhances availability
Computer Science & Information Technology
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Computer Science & Information Technology
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Computer Science & Information Technology