| 摘要 |
<P>PROBLEM TO BE SOLVED: To observe the service level of a business system. <P>SOLUTION: In a cluster system, an in-use and a standby business execution physical server share a cluster common volume. The cluster system includes an operation result detection part which stores a service level as an operation target of the system and restart order of a plurality of virtual servers, and detects operation results of the virtual servers, a configuration alternation detection part which measures restart times of the virtual servers during maintenance of the virtual servers and updates restart times to the measured restart times, a restart order update part which calculates redundancies of the plurality of virtual servers, determines new restart order based upon the calculated redundancies, the detected operation results, the stored service level, and the updated restart times, and updates restart order to the determined new restart order, and a virtual server restart part which restarts the plurality of virtual servers on the standby business execution physical server based upon the updated new restart order when performing failover from the in-use business execution physical server to the standby business execution physical server. <P>COPYRIGHT: (C)2012,JPO&INPIT |
