Patent ID: 9176964
Filing Date: 2015-11-03
Classification: G06F

Abstract:
1. In a computer system including first and second computer devices coupled to a central database device over a data communications network, a method for data deduplication comprising: instantiating the first computer device to a first deduplication level; identifying a first data item by the first computer device; performing by the first computer device a lookup of a deduplication table according to a duplicacy rule for determining duplicacy of the first data item at the instantiated first deduplication level, the deduplication table being stored in the central database device and including an entry for a second data item with content equal to content of the first data item, the second data item being associated with a second deduplication level different from the first deduplication level, wherein the second entry of the deduplication table stores a value corresponding to the content of the second data item; in response to the lookup of the lookup table based on the duplicacy rule, determining by the first computer device that there is no duplicacy of the first data item at the first deduplication level; in response to the determination that there is no duplicacy at the first deduplication level, transmitting by the first computer device a request to add an entry in the deduplication table for the first data item; and adding by the central database the entry for the first data item at the first deduplication level, wherein the adding includes storing a value in the deduplication table corresponding to the content of the first data item, wherein the value stored in the first entry is equal to the value stored in the second entry.