Hitachi, Ltd.

Kentaro Chigusa

Yukio Nakano

Kazutomo Ushijima

Tadataka Matsubayashi

Morihiro Iwata

Kenichi Chadani

Tsuyoshi Sudo

A virtual machine deployment determination unit that manages a plurality of physical machines as machines in which a virtual machine is to be deployed acquires setting information including a type of software that is running on the virtual machine and an operating policy of the software, refers to deployment condition determination information which prescribes a deployment condition for selecting the physical machine to become the deployment destination of the virtual machine is associated with the operating policy of the software and stored therein based on the acquired setting information, and determines the physical machine to become the deployment destination of the virtual machine by selecting the physical machine among the plurality of physical machines based on the referral result.

Computer, virtual machine deployment method and program

A retrieval apparatusfor searching document data comprises a document storage areafor storing documents to be searched and a document management tablefor storing a data size of a document such that the data size is associated with a document ID for identifying the document. The retrieval apparatusreads out from the document management table data sizes of documents to be searched, and calculates a retrieval document size by adding up the read out data sizes, and calculates an estimated time ttaken for a retrieval process by the index scan method and an estimated time ttaken for the retrieval process by the text scan method, based on the retrieval document size. The retrieval apparatuscompares the estimated times tand t, and decides which method to use for a retrieval process, the index scan method or the text scan method.

Retrieval apparatus, retrieval method and retrieval program

The amount of work processing (main processing amount) of a database is acquired and accumulated. A value (main processing index) indicating the transition of the amount of main processing amount available in a time frame that is presumed to be required for backup is calculated by using the amounts of main processing accumulated during the latest period of time. The main processing index is compared with the backup executability reference value which is a threshold value determining the backup executability. If the main processing index is smaller than the threshold value, backup is executed. If the main processing index is larger than the threshold value, backup is not executed but the amount of main processing is again acquired to calculate the main processing index, and the main processing index is compared with the backup executability reference value.

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Tokyo, Japan

Kentaro Chigusa