Computer, computer system, and data quantity restriction method

A computer comprising:

• a storage device;
• an NW I/F (network interface) connected to one or more other computers;
• a storage virtual machine that manages a logical volume;
• and
• at least one processor configured to execute one or more entities, wherein each of the one or more entities is an application or virtual machine that can write data to the logical volume managed by the storage virtual machine and recognized by the entity, and send data via the NW I/F, and wherein the at least one processor is configured to, for each of the one or more entities,
• allocate a portion of a total send quantity of the NW I/F to the entity as an allocated send quantity,
• set an upper-limit NW send quantity and an upper-limit write quantity for the entity, such that a sum of the upper-limit NW send quantity and the upper-limit write quantity is equal to or lower than the allocated send quantity for the entity, wherein each of the upper-limit NW send quantity and the upper-limit write quantity indicates a quantity of data per unit time,
• restrict writes of data by the entity to the logical volume, managed by the storage virtual machine and recognized by the entity, so as not to exceed the upper-limit write quantity,
• restrict sending of data by the entity via the NW I/F to the one or more other computers so as not to exceed the upper-limit NW send quantity, and,
• when data to be written to the logical volume, managed by the storage virtual machine and recognized by the entity, is received, store the data in the storage device, and transfer the data to each of N other computers, from among the one or more computers, for storage in the N other computers, wherein N is an integer greater than zero,
• wherein the at least one processor is configured to, for each of the one or more entities, set the upper-limit write quantity to be smaller as the value of the N gets larger.