Data processing system

A data processing system, comprising:

• a plurality of computers, each of which includes a processor and a memory;
• and
• a storage device which is connected to the plurality of computers to store data,
• wherein the computer includes a node pool which is possible to perform, stop, and delete one or more nodes,
• wherein the node pool includes one or more first nodes which function as a data buffer, and a third node which controls the first node,
• wherein, when receiving a request of measurement, the third node measures a performance of data transmission between the data buffer and the storage device, and makes a response with a measurement result of the performance,
• wherein, when receiving a notification of performing or deleting the first node, the third node adjusts a number of the first nodes on the basis of the notification.

A data processing system, comprising:

• a plurality of computers, each of which includes a processor and a memory;
• a storage device which is connected to the plurality of computers to store data;
• and
• a management computer which includes a processor and a memory to control the plurality of computers,
• wherein the computer includes a node pool which is possible to perform, stop, and delete one or more node,
• wherein the node pool includes one or more first nodes which function as a data buffer, a second node which makes an access to the data buffer, and a third node which controls the first node,
• wherein the management computer causes the third node to measure a performance of data transmission between the data buffer and the storage device when receiving a connection request to the data buffer from the second node, determines a number of increased/decreased first nodes on the basis of a measurement result of the performance, and notifies the node pool of a number of the first nodes according to the determined number of increased/decreased nodes and a predetermined initial value, and
• wherein the node pool performs the first node according to the number notified from the management computer.