Storage node, the storage node management device, the storage node logical capacity setting method, a program, a recording medium and distributed data storage system

An object of the present invention is based on the I / O performance value of the storage node is to provide a storage node management apparatus capable of setting the logical volume of the storage space. Storage node management apparatus of the present invention, in a distributed data storage system, it sets at least one reference node from the plurality of I / O performance of different storage nodes, with reference to the I / O performance and logical capacity of the reference node Te, thereby dividing the storage area of ​​the storage nodes other than the reference node to the first storage area and second storage area, matching the logical capacity of each area in I / O performance of the storage nodes other than the reference node a setting unit be set to, Wherein comprising a distributed data storage system determining unit for determining the system configuration information reflecting the configuration changes, and a transmission unit which transmits the system configuration information in different storage node of the plurality of I / O performance.