Hitachi, Ltd.

Naoshi Maniwa

Hideo Ohata

Nobuyuki Yamamoto

Takato Kusama

Yasufumi Uchiyama

Hironobu Sakata

Hiromichi Yamagiwa

Junpei Nishitani

A distributed transaction control system includes redundant coordinator apparatuses, wherein determination part replaces input votes to votes of preparation failure when input votes from the participant apparatus time out, makes a determination of commit when all input votes are votes of preparation success, makes a determination of rollback when the input votes include at least one vote of preparation failure, and inputs a content of the determination into the distributed consensus processing part, the distributed consensus processing part decides on one of the contents of the determination that are inputs from the determination parts, by distributed consensus, and settlement part notifies an output of the distributed consensus processing part to the participant apparatuses as a settlement result.

Distributed transaction control system and distributed transaction control method

Multiple storage apparatuses each provide a virtual logical volume composed of multiple logical pages to a host computer. A management computer determines a target logical page to which data are migrated to achieve a volume goal performance on the basis of access path information that can identify a storage apparatus that receives an I/O request in which the virtual logical volume is specified, an actual volume response performance, the volume goal performance to be attained, a page response performance of the logical page, and storage destination information that can identify a storage apparatus in which a storage area allocated to the logical page is present, and migrates data of the logical page between storage apparatuses.

Method for selecting a page for migration based on access path information and response performance information

Computer system providing to a host computer a virtual logical volume that is associated with a logical pool configured from storage areas respectively provided by first and second storage apparatuses, and dynamically assigns a storage area from the logical volume to the virtual logical volume, a host computer and the first storage apparatus are connected via a first path configuring an access path, and, when a ratio of an access volume used by a second path connecting the first and second storage apparatuses exceeds a predetermined ratio, it is determined that a problem with the access path from the host computer to virtual logical volume, a third path connecting the host computer and the second storage apparatus is identified as a change destination of the access path, and the identified third path is changed to a part of the access path from the host computer to the virtual logical volume.

Management apparatus and management method

The present invention provides a configuration which can realize both two objects of prevention of performance deterioration and a reduction in storage management cost and shift a volume to a storage device which supports a hierarchical pool. To provide the configuration, a storage managing system acquires access information indicating an access load to a logical volume in a storage subsystem from a device file in a host server as access information in a page unit. The storage managing system acquires, from a storage subsystem having a hierarchical pool function, information concerning the configuration and a capacity of hierarchies of the storage subsystem. A capacity of the logical volume is calculated from the number of pages and a page unit capacity indicated by the access information. The storage managing system calculates, on the basis of information concerning the capacity of the logical volume and information concerning the configuration and the capacity of the hierarchies, a configuration candidate of a hierarchical pool for allocating a storage region for storing data included in the logical volume via the hierarchical pool to a virtual logical pool and outputs the configuration candidate of the hierarchical pool.

Storage managing system, computer system, and storage managing method

The present invention provides a technique for arranging a virtual logical volume group for satisfying target response performance and realizing a cost reduction. For this purpose, in the present invention, in a storage managing system which manages a storage subsystem comprising in a pool using plural storage devices (hierarchies) having different performances and provides plural virtual logical volumes from the pool, the plural virtual logical volumes are classified into plural groups on the basis of information concerning target response performance concerning each of the plural virtual logical volumes such that each of the plural virtual logical volumes satisfies the target response performance. A new pool is allocated to each of the plural groups of the virtual logical volumes. Further, information indicating a correspondence relation between the pool and the virtual logical volumes included in the groups is generated and the information is output.

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Tokyo, Japan

Naoshi Maniwa