| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve throughput of an entire system by realizing load distribution, while inhibiting a number of arranged virtual servers. <P>SOLUTION: In a data load distribution arrangement system 1 comprising a virtual server arrangement device 10 which is communicably connected to a plurality of DB servers 20, the virtual server arrangement device 10 calculates an absolute value of a difference between a load and a server threshold for each DB server 20 and generates aggregation of servers S<SP POS="POST">-</SP>whose loads are equal to or less than the server threshold and aggregation of servers S<SP POS="POST">+</SP>whose loads are more than the server threshold. Then the virtual server arrangement device 10 generates data information for server in charge 100 by arranging the virtual servers of the servers S<SP POS="POST">-</SP>against an excess of an area of which the servers S<SP POS="POST">+</SP>are in charge on a hash space, sequentially from the DB server 20 with the largest absolute value among the servers S<SP POS="POST">-</SP>. Each DB server 20 exchanges data stored by itself with another DB server 20 on the basis of the data information for server in charge 100 generated by the virtual server arrangement device 10. <P>COPYRIGHT: (C)2013,JPO&INPIT |
