SAP SE
Page list based crash recovery

Abstract:

A method for generating a data directory can include allocating a first page for storing a first segment of a log recording changes applied to data subsequent to a checkpoint. When the first page reaches maximum capacity, a second page can be allocated for storing a second segment of the log. A third page can be allocated for storing a first page list that includes a first page reference to the second data page. A fourth page serving as a restart page can be updated. The fourth page can store a second page list of data pages storing the data directory. The fourth page can be updated to add, to the second page list, a second page reference to the data page. Crash recovery at the computing node can be performed based on the data directory. Related systems and articles of manufacture are also provided.