Coupled node tree backup/restore apparatus, backup/restore method, and program
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United States of America Patent
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Feb 26, 2013
Grant Date -
Feb 18, 2010
app pub date -
Oct 19, 2009
filing date -
Apr 19, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A coupled node tree has a root node and a node pair, the node pair being a branch node, which includes position information of a link target node pair, and a leaf node, which includes a search target index key, or a pair of branch nodes, or a pair of leaf nodes located in adjacent storage areas. The nodes of the coupled node tree are backed up in a depth precedence search sequence. The coupled node tree is restored by repeating the following process: reading out the nodes in the sequence they are backed up, storing in a stack the position information of the node to be restored, successively restoring child nodes as long as branch nodes are encountered, restoring a leaf node which is read out and then, tracing back up the stack, a decision being made as to which node is next to be restored.
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