Patent ID: 9471485
Filing Date: 2016-10-18
CPC Classification: G06F

Claim Text:
1. A method for maintaining a data set, comprising: storing a base copy of the data set in a first non-volatile memory, the first non-volatile memory having a first writing speed; storing a current copy of the data set in a working memory, and making changes to the current copy; storing the changes to the data set in a first change data set in a second non-volatile memory which is different than the working memory, the second non-volatile memory having a second writing speed, wherein there is a threshold number for a number of entries in the first change data set in the second non-volatile memory; and moving part or all of the first change data set into a second change data set in the first non-volatile memory if the number of entries in the first change data set in the second non-volatile memory reaches the threshold number.