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Title:
CLUSTER SYSTEM
Document Type and Number:
WIPO Patent Application WO/2012/066691
Kind Code:
A1
Abstract:
The present invention provides a cluster system wherein a cluster shared volume is shared by active or standby operation-performing physical servers. The cluster system is provided with an operation result detecting unit which stores a service level as the operation target of a system and a restart sequence of a plurality of virtual servers, and detects the operation results of a virtual server; a configuration change detecting unit which measures the restart time of the virtual server during the maintenance of the virtual server, and updates the restart time to the measured restart time; a restart sequence updating unit which determines a new restart sequence, and updates the restart sequence to the newly determined restart sequence, on the basis of the calculated redundancy of a plurality of virtual servers, the detected operation results, the stored service level, and the updated restart time; and a virtual server restart unit which, when fail-over is performed from an active operation-performing physical server to a standby operation-performing physical server, restarts a plurality of virtual servers on the standby operating-performing physical server on the basis of the newly updated restart sequence.

Inventors:
ODA TAKUYA (JP)
Application Number:
PCT/JP2010/073511
Publication Date:
May 24, 2012
Filing Date:
December 27, 2010
Export Citation:
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Assignee:
HITACHI LTD (JP)
ODA TAKUYA (JP)
International Classes:
G06F9/46
Foreign References:
JP2004537126A2004-12-09
JP2008171427A2008-07-24
JP2005258847A2005-09-22
Attorney, Agent or Firm:
POLAIRE I. P. C. (JP)
Polaire Intellectual Property Corporation (JP)
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