Shadowed management of free disk pages with a linked list

  • Authors:
  • Matthew S. Hecht;John D. Gabbe

  • Affiliations:
  • Interactive Systems Corp.;Bell Labs

  • Venue:
  • ACM Transactions on Database Systems (TODS)
  • Year:
  • 1983

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Abstract

We describe and prove correct a programming technique using a linked list of pages for managing the free disk pages of a file system where shadowing is the recovery technique. Our technique requires a window of only two pages of main memory for accessing and maintaining the free list, and avoids wholesale copying of free-list pages during a checkpoint or recover operation.