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Recovery in Distributed Real-Time Database Systems
University of Skövde, Department of Computer Science.
1999 (English)Independent thesis Advanced level (degree of Master (One Year))Student thesis
Abstract [en]

Recovery is a fundamental service in database systems. In this work, we present a new mechanism for diskless real-time recovery in fully replicated distributed real-time database systems. Traditionally, recovery has relied on disk-resident redundant data. Unfortunately, disks cannot always be used in real-time systems since these systems are sometimes used in environments which do not allow the use of disks. Also, minimizing the amount of hardware can save money, especially in mass-produced products. Instead of loading the database from disk, our recovery mechanism enables a restarted node to retrieve a copy of the database from an arbitrary remote node. The recovery mechanism does not violate timeliness during normal processing and, during recovery, all nodes except for the recovering node can guarantee the timeliness of critical transactions. The mechanism uses fuzzy checkpointing to copy the database to the recovering node. Fuzzy checkpointing has been chosen since it copies the database without regard to concurrency control and, thus, does not increase data contention in the database. We conclude that the suggested recovery mechanism is a feasible option for fully replicated distributed real-time database systems.

Place, publisher, year, edition, pages
Skövde: Institutionen för datavetenskap , 1999. , 93 p.
Keyword [en]
diskless distributed recovery, distributed real-time database systems, fuzzy checkpointing, eventual consistency
National Category
Information Science
Identifiers
URN: urn:nbn:se:his:diva-395OAI: oai:DiVA.org:his-395DiVA: diva2:2765
Presentation
(English)
Uppsok
Social and Behavioural Science, Law
Supervisors
Available from: 2007-12-12 Created: 2007-12-12 Last updated: 2009-11-16

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CiteExportLink to record
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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
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