Management device, a distributed storage system, access destination selection method, data storage unit setting method and program

摘要

Management apparatus for managing a distributed storage system comprising a plurality of data storage unit having the identification numbers of a plurality of digits and stores the data, to learn the identification number of said plurality of data storage unit, a mask of said identification number identifying a set of data storage unit remaining upper digits excluding a predetermined low-order digit is set as the digit of interest is the same identification numbers as a group to the specified group, the predetermined digit of the masked assigns a group number which is obtained by substituting a value, and obtains the group hash value is a value obtained by applying a hash function to the group number, data by applying the hash function to the corresponding key to the data reading and writing the object obtains the key-hash value, the data key hash value in accordance with a predetermined allocation method by assigning to one of said group hash value, the data storage to the corresponding data of the write target, the group of the identified identification number Associate with the department groups.