Abstract: A data processing system includes a storage apparatus having a plurality of data storages and a processing control apparatus, the processing control apparatus is configured to: calculate hash information from data; and uniquely decide an arrangement destination of the data in the plurality of data storages according to the calculated hash information, and the storage apparatus is configured to: move specific data specified as a movement processing target among a plurality of pieces of stored data stored in the data storage from the arrangement destination of the specific data to a movement destination; and write information on a storage position of the specific data to the arrangement destination of the specific data after the movement.

Abstract: An information processing apparatus includes a memory and a processor coupled to the memory. The memory stores first information and second information. The first information includes a permission time with respect to each of a plurality of operation states of the information processing apparatus in an activation state. The permission time is a time allowed for switching a substitute apparatus from a standby state to the activation state. The second information includes an activation time required for activating each of a plurality of modules which operate on the substitute apparatus. The processor identifies one permission time corresponding to a current operation state. The processor determines stop modules such that a total time for activating the stop modules is equal to or less than the one permission time based on the second information. The processor instructs the substitute apparatus in the standby state to stop the stop modules.

Abstract: An information processing apparatus includes a memory and a processor coupled to the memory. The memory stores first information and second information. The first information includes a permission time with respect to each of a plurality of operation states of the information processing apparatus in an activation state. The permission time is a time allowed for switching a substitute apparatus from a standby state to the activation state. The second information includes an activation time required for activating each of a plurality of modules which operate on the substitute apparatus. The processor identifies one permission time corresponding to a current operation state. The processor determines stop modules such that a total time for activating the stop modules is equal to or less than the one permission time based on the second information. The processor instructs the substitute apparatus in the standby state to stop the stop modules.

Abstract: When a master name node has created a file, the master name node performs meta-information synchronization with only a slave name node, and does not perform the meta-information synchronization with a dummy name node. The master name node performs the meta-information synchronization with the dummy name node asynchronously with file creation. Furthermore, the slave name node stores the same meta-information as that stored in the master name node, and the file is stored in a data node placed in the same node as the slave name node and a data node placed in the same node as the master name node.