Research on BW-RAID reconstruction technology and optimization

Efficient reconstruction technology can improve the service performance and reduce reconstruction time effectively.A mechanism of"data volume reconstructed first"and a method of"redirection of read for reconstructed data"are proposed to improve the service performance during data recovery.Based on the mechanism and method,two strategies that take advantage of characteristics of user load,such as"hot and cached data"to direct reconstruction process and"affixation of user requests"to speed up reconstruction process,are given to improve performance and efficiency during data recovery.