IBM Systems Journal - 2002 Copyright

IBM Skip to main content
  Home     Products & services     Support & downloads     My account  

  Select a country  
Journals Home  
  Systems Journal  
    Current Issue  
    Recent Issues  
    Papers in Progress  
    Author's Guide  
Journal of Research
and Development
  Contact Us  
  Related links:  
     IBM Research  

IBM Journal of Research and Development  
Volume 23, Number 2, Page 178 (1984)
  Full article: arrowPDF   arrowCopyright info


Data recovery in IBM Database 2

by R. A. Crus
This paper presents the various forms of data recovery provided by IBM Database 2 (DB2). It describes the DB2 recovery log, introduces the notion of a unit of recovery, and discusses the two-phase commit protocol used by DB2. Furthermore, it describes what type of information is logged, the DB2 checkpoint process, what a compensation log record is, and how DB2 handles undo/redo processing, media recovery, restart after abnormal system termination, and data unavailability.
Related Subjects: Database