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

A storage node logical capacity setting method comprising:

• setting at least one reference storage node from storage nodes having different I/O performances included in a distributed data storage system;
• and
• partitioning a storage region of each of the storage nodes other than the reference storage node into a first storage region and a second storage region based on the I/O performance and a logical capacity of the reference storage node and setting a logical capacity of the first storage region and a logical capacity of the second storage region in accordance with the I/O performance of the storage nodes other than the reference storage node,
• wherein the first storage region and the second storage region of each of the storage nodes, other than the reference storage node, are set based on the I/O performance of the respective storage node by:
• setting a logical capacity of a first storage region of each of the storage nodes other than the reference storage node to be N times of the logical capacity of the reference storage node while the I/O performance of each of the storage nodes other than the reference storage node is N times of the I/O performance of the reference storage node, and
• setting a remaining capacity of each of the storage nodes, other than the reference storage node, that exceeds N times of the logical capacity of the reference storage node as the second storage region, while the logical capacity of the storage nodes other than the reference storage node is N times or more of the logical capacity of the reference storage node.

A non-transitory recording medium recording a program that causes a computer to execute:

• a process of setting at least one reference storage node from a plurality of storage nodes having different I/O performances included in a distributed data storage system and
• a process of partitioning a storage region of each of the storage nodes other than the reference storage node into a first storage region and a second storage region, referring to the I/O performance and a logical capacity of the reference storage node, and setting a logical capacity of the first storage region and a logical capacity of the second storage region in accordance with the I/O performance of the storage nodes other than the reference storage node;
• and
• a process of setting the first storage region and the second storage region of each of the storage nodes, other than the reference storage node, based on the I/O performance of the respective storage node by:
• setting a logical capacity of a first storage region of each of the storage nodes other than the reference storage node to be N times of the logical capacity of the reference storage node while the I/O performance of each of the storage nodes other than the reference storage node is N times of the I/O performance of the reference storage node;
• and
• setting a remaining capacity of each of the storage nodes, other than the reference storage node, that exceeds N times of the logical capacity of the reference storage node as the second storage region, while the logical capacity of the storage nodes other than the reference storage node is N times or more of the logical capacity of the reference storage node.