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Storage

Types

  • heap file org
  • sequential
  • hash
  • clustered

operations

  • update
  • retreival
  • open
  • locate
  • read
  • write
  • close

RAID

redundant array of independent disks, treat multiple disks as 1.

  • raid 0
  • 1 - mirroring
  • 2 - error correction code using hamming distance
  • 3 - parity bit - byte level striping
  • 4 - parity bit - block level striping
  • 5 - parity bits do not have seperate disks
  • 6 - 2 indipendent parity bits, on same disks