Flashcards
Key Terms
Cards in this deck (13)
- 1Memory HierarchyCPU -> CACHE -> MAIN MEMORY -> DISK -> TAPE
- 2Persistent StorageNonvolatile (retains information when the computer is restarted/crashes)
- 3Random vs Sequential DevicesTapes are sequential and must step through all data/cannot access a given location. Random is good for operational data (Magnetic Disks)
- 4Seek TimeTime taken to move the disk heads to the track on which a desired block is located.
- 5Rotational DelayWaiting time for the desired block to rotate under the disk head
- 6Transfer TimeTime to actually read or write the data in the block once the head is positioned
- 7Buffer poolCollection of pages in main memory
- 8FramesMain memory pages in the buffer pool (slots that can hold a page)
- 9pin_countVariable of a frame that tells if the page in it has been requested but not released
- 10dirty bitWeather page has been modified since it was brought into the buffer pool from disk
- 11Recover managerResponsible for ensuring transaction atomicity and durability
- 12AtomicityUndoing actions of transactions that do not commit
- 13DurabilityMaking sure all actions of committed transactions survive system crashes and media failures
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- CS404 Flashcards on Key Terms, created by Curtis Hermanson on 05/01/2017.
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- Curtis Hermanson
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