Data processing: database and file management or data structures – File or database maintenance – Database recovery
Reexamination Certificate
2011-05-17
2011-05-17
Mofiz, Apu M (Department: 2161)
Data processing: database and file management or data structures
File or database maintenance
Database recovery
C707S684000, C707S767000, C714S006210, C714S016000, C714S019000
Reexamination Certificate
active
07945538
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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Daye Chelcie
Lembke Kent A.
Marsh & Fischmann & Breyfogle LLP
Maynard Jeffrey C.
Mofiz Apu M
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