| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent processing speed from decreasing even when an access frequency is unbalanced between data stored in node devices. <P>SOLUTION: According to an embodiment, each node device compares access frequency information and threshold information in order to determine whether a value indicated by the access frequency information exceeds a threshold indicated by the threshold information. When the value indicated by the access frequency information exceeds the threshold indicated by the threshold information, each node device reads out data associated with data identification information included in a reading request, duplicates the read-out data, reads out any node device identification information other than node device identification information associated with the data identification information, and transmits the duplicated data to a node device corresponding to the read-out node device identification information. <P>COPYRIGHT: (C)2012,JPO&INPIT |
