Difference L2P method

摘要

A method for maintaining a data set includes storing a base copy of the data set in a first non-volatile memory having a first writing speed, storing changes to the data set in a first change data set in a second non-volatile memory having a second writing speed, and generating a current copy of the data set by reading the base copy and the changes. If a threshold number of entries in the first change data set is reached, then part or all of the first change data set is moved into a second change data set in the first non-volatile memory, where the generating step includes reading the second change data set. If a threshold number of entries in the second change data set is reached, then the current copy is generated by reading the base copy and the changes in the first and the second non-volatile memory.

主权项

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.