Hitachi, Ltd.

Canon Kabushiki Kaisha

Shinya Matsumoto

Takahiro Nakano

Akira Yamamoto

Nobuyuki Saika

Yohsuke Ishii

Hitoshi Arai

Atsushi Sutoh

Jun Nemoto

Etsutaro Akagawa

Homare Kanie

Masaki Iwasaki

In some examples, a load on a first node of a plurality of nodes, over a period of time, may be determined based at least in part on comparing a load parameter with a load threshold. When the load parameter exceeds the load threshold, one or more nodes may be randomly selected from the plurality of nodes. Furthermore, an access load to move from the first node may be determined. The access load may correspond at least partially to data access requests received from user computing devices over the period of time. In addition, at least one node from the randomly selected one or more nodes may be determined that is able to receive the access load. A portion of data may be transferred from the first node to the at least one node. For instance, the portion of data transferred may be based on the access load.

Load balancing for scalable storage system

When a management screen for conducting management operation of a file system in the NAS apparatusof a file server is displayed by the administrator on a display device of the management consoleby using the management console, if a disk device obtained from the storage apparatusis in a power saving state, the NAS apparatushas a function to change the operations hereafter. Specifically, a screen is displayed on the management screen, in which a creation or deletion of the file system becomes impossible with respect to the disk device in the power saving state. Therefore, the administrator can conduct management operations for services without referring to the power status, thereby resulting in easy management operation.

Storage system and management method of file system using the storage system

A storage apparatus is connected via a network to a plurality of host computers requesting data writing. The storage apparatus includes: a volume creation unit for creating virtual volumes to be accessed by the host computers; an allocation unit for allocating a storage area of the storage apparatus to a data storage area of the virtual volumes in response to a data write request from the host computers; and a capacity management unit for managing the capacity of data written from the host computers; wherein the capacity management unit adds the data written from the host computers with regard to each host computer and judges whether a total value of the added data exceeds a specified threshold or not.

Storage apparatus and storage management method for storing entries in management tables

A computer system comprising storage devices having different characteristics, a client computer, and a file access controller managing the storage devices with the HSM is disclosed. The file access controller provides a normal directory tree and a virtual directory tree, according to the configuration, and provides a first file stored in a first storage device through the normal directory tree and the virtual directory tree. And, the file access controller switches providing of a second file stored in a second storage device, depending on a used directory tree, which is used by the at least one client computer, and which is the normal directory tree or the virtual directory tree. Examples of the switch are about accessibility of the second file and recall processing of the second file.

Computer system and recording medium

An image reproducing apparatus includes a selector which selects output of the MPEG decoder in a reproducing mode. A connection detection unit detects whether a video monitor is connected to an output terminal and a result of the detection is sent to a CPU. When a video monitor is connected, the CPU reads out bit map data of an operation icon having an enlarged size from a ROM and sends the data to an OSD control unit. The OSD control unit determines whether a blue background is displayed on a touch panel. If the operation icon is not enlarged, the OSD control unit masks a background portion with a single color (for example, blue background) and displays an enlarged operation icon over the background portion.

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Yokohama, Japan

Shinya Matsumoto