Storage management device, information processing system, storage management method, and recording medium

An information processing system comprising:

• a first data center;
• and
• a second data center, wherein
• a storage management device, which is a storage management device of either one of the first data center and the second data center, includes:
• a memory;
• and
• a processor coupled to the memory, wherein the processor executes a process including:
• managing a plurality of storages that stores data of a virtual machine that is able to be transferred between the first data center and the second data center;
• first performing management to cause a first storage of the first data center to hold data of the virtual machine being operated in the first data center as master data and cause a second storage of the second data center to hold data equivalent to the master data as backup data;
• and
• second performing management to cause the second storage to hold update data for the backup data held in the second storage independently from the backup data and cause a third storage different from the first storage and the second storage to duplicate the update data when a data storage destination is switched from the first storage to the second storage for the virtual machine being operated in the second data center.

A non-transitory computer-readable recording medium having stored therein a program that causes a computer to execute a storage management process comprising:

• managing a plurality of storages in a system in which a data storage destination is switched between a first storage and a second storage;
• first performing management to cause the first storage to hold data as master data and cause the second storage to hold data equivalent to the master data as backup data;
• and
• second performing management to cause the second storage to hold update data for the backup data held in the second storage independently from the backup data and cause a third storage different from the first storage and the second storage to duplicate the update data when the data storage destination is switched from the first storage to the second storage.