Method and arrangements for node recovery
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United States of America Patent
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May 17, 2011
Grant Date -
Jun 3, 2004
app pub date -
Mar 13, 2001
filing date -
Mar 13, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present invention relates to a method and arrangements for node recovery particularly suitable for recovery involving large database fragments. The method for node recovery according to the present invention makes use of an old version of a fragment in a failed node (114). The old version is brought up to date by means of scanning an up to date version of the fragment in another node and copying parts of the fragment (117), which have changed since the creation of the old version, to the recovering node. A delete log is utilized in order to take deletions, which have taken place since the creation of the old version, into account in the recovery of the failed node (116). An advantage of the method for node recovery according to the present invention is that it does not require write transactions to be stopped during the recovery process.
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