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Introduction to Database Systems by ITL Education Solutions Limited

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CHAPTER 7

DATA STORAGE AND INDEXING

After reading this chapter, the reader will understand:

  • Different types of storage devices including primary storage, secondary storage, and tertiary storage
  • Important characteristics of storage media
  • Magnetic disk and its organization
  • Seek time, rotational delay, and data transfer time
  • Redundant array of independent disk, that is, RAID
  • Performance and reliability improvement of disk with RAID
  • All the RAID levels from level 0 to 6
  • New storage systems
  • The concept of files and pages
  • Responsibilities of buffer manager
  • Management of buffer space
  • Page-replacement policies
  • Fixed-length and variable-length records
  • Spanned and unspanned organization of records in disk blocks
  • Various file organizations including heap ...

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