Hitachi, Ltd.

Yuichi Yagawa

Shigeki Hirasawa

Michio Morioka

Tadashi Kuwabara

Shigeru Kishiro

Tomochika Ozaki

Akio Yajima

Naoki Watanabe

Hironori Emaru

Takahiro Fujita

Shigetoshi Hayashi

Kiyoshi Matsumoto

Koichi Murayama

Hiroyuki Inoue

Mitsuhiko Yoshimura

Kazuto Senda

Hiromi Ukai

Hideo Nishijima

Hitoaki Owashi

Keiji Kojima

Toshiyuki Ono

Akira Maeda

Nobuyuki Osaki

Hidehisa Shitomi

Kenji Baba

Kenichi Funaki

Kiyoshi Kumagai

Kyoko Mikami

Takuya Okamoto

Akira Tanaka

Manabu Kitamura

Shoji Kodama

Koichi Sano

Norifumi Nishikawa

Takayuki Nagai

Jun Nakajima

Daisuke Shinohara

Takashi Amano

Akihiro Mannen

Hiroaki Odawara

Masaaki Hosouchi

Toyohiro Nomoto

Yoshiyuki Azuma

Katsuhiko Abe

Toru Yamada

Keiichiro Inaba

Eiichi Yukino

Claus Mikkelsen

Tomohiro Nakagaki

Hidehiko Ogasawara

Nobukage Takahashi

Display screen with graphical user interface

Writing paper

For each of multiple migration policies, a server systemthat accesses a storage apparatusobtains a resource use amount needed to execute the migration. Each of the migration policies includes information for specifying a resource use amount of the server systemneeded to execute the migration according to the policy. Then, the server systemallocates an amount of usable resources to each of the policies in accordance with the resource use amount obtained for the policy; in the migration according to each of the policies, allocates a certain amount of resources usable for executing the migration, to the virtual server which serves as either of a migration destination and a migration source, while determining the certain amount of resources within the amount of resources allocated to the policy; and executes the migration according to each of the policies in accordance with the resource use amount allocated to the policy.

Method for executing migration between virtual servers and server system used for the same

Copy pair monitoring is provided for a storage system having plural host computers, at least one storage subsystem, and a management computer. The storage subsystem including volumes storing data requested by the host computer, the management computer being accessible to the host computer and the storage subsystem. The copy pair monitoring includes obtaining every piece of copy pair definition information that is stored in the host computer, removing duplicate copy pair definition information from the whole copy pair definition information obtained, and collecting the copy pair status based on the obtained copy pair definition information from which duplicate copy pair definition information has been removed. Each host computer is assigned a priority level, and, when more than one host computer includes the same copy pair, the host computer with the lowest priority obtains the copy pair information to reduce the load on the higher priority host computers.

Method of improving efficiency of replication monitoring

In order to limit host computers permitted to control a storage area from host computers, provided is a storage management computer coupled to one or more host computers for providing services and one or more storage systems, in which the storage management computer judges whether the host computer is permitted to control the storage area based on data indicating the configuration information of the storage system and service management information for managing the services provided by the host computers, and in case of which it is judged that the host computer is permitted to control the storage area, the storage management computer sets access control data to permit the host computer to control the storage area.

Method and program for supporting setting of access management information

Provided is a copy pair monitoring method which is for a storage system having at least one host computer, at least one storage subsystem, and a management computer, the storage subsystem including volumes storing data requested by the host computer to be written, the management computer being accessible to the host computer and the storage subsystem. The copy pair monitoring method is characterized by including the steps of: obtaining every piece of copy pair definition information that is stored in the host computer; removing duplicate copy pair definition information from the whole copy pair definition information obtained; and collecting the copy pair status based on the obtained copy pair definition information from which duplicate copy pair definition information has been removed.

Provided is a computer system including a host computer, a plurality of virtual storage systems coupled to the host computer, a storage system coupled to the plurality of virtual storage systems, and a management computer. The storage system includes storage areas provided as volumes to the host computer. Each of the virtual storage systems provides virtual volumes corresponding to the volumes to the host computer. The host computer disperses a plurality of data I/Os containing data to be written in one of the volumes to the virtual volumes of a plurality of paths reaching the one of the volumes at a determined ratio. The management computer calculates a threshold value of a performance value to be set in the virtual volume of each of the paths to determine whether to generate an alert based on the predetermined ratio. Thus, performance of the computer system is properly managed.

Computer system, computer and method for managing performance based on I/O division ratio

A secure data mirroring capability in a storage system includes encrypting data blocks in a primary volume in preparation for a data mirroring operation. The encrypted data blocks are mirrored to a secure secondary volume. Host systems provide keys from which encryption keys are produced for encrypting the data blocks. Access to data on the secure secondary volume requires decryption using the key that was used to produce the encrypted data blocks.

Method and apparatus for secure data mirroring a storage system

Provided is an access right managing method for a resource of a storage system, in which a management computer stores access right definition information of the resource, and resource correspondence information including information on a management program which manages another resource related to the resource managed by the management program. In case of which receiving an updating request of an access right of the resource, the management computer updates an access right based on the updating request of the access right, selects a management program of the resource whose access right is requested to be updated based on the resource correspondence information, transmits an updating request of an access right for a relative resource to a management computer which executes the selected management program, and in case of which the access right updating request of the related resource is received, updates the access right of the relative resource.

Access right managing method for accessing multiple programs

A method for copying data to multiple remote sites includes transmitting data from a first volume in a primary storage system to a back-up volume provided in a secondary storage system. The primary storage system is located at a primary site, and the secondary storage system is located at a first remote site from the primary site. The data from the first volume in the primary storage system is copied to a second volume in the primary storage system using a point in time (PiT) as a reference point of time for the copying. The second volume is provided with a first time consistent image of the first volume with respect to the reference point of time. The data from the second volume in the primary storage system is transferred to a third volume in a ternary storage system at a second remote site. The third volume is provided with a second time consistent image of the second volume with respect to the reference point of time, where the second time consistent image is a mirror image of the first time consistent image. The data from the third volume is transferred to a fourth volume in the ternary storage system. The fourth volume is provided with a third time consistent image. In the ternary storage, either of the third volume or fourth volume can always keep time consistent image of the first volume.

Point in time remote copy for multiple sites

Groups of volumes having a certain amount of commonality of data are identified within a storage system. For each group, the process defines a base volume, such as the volume containing the most commonality with the other volumes. For each volume in the group, the process extracts differential data between the base volume and each other volume, saves the differential data in a pool volume, and updates a mapping table. Commonality between volumes in the group is managed in the base volume, the pool volume, and the mapping table. Then the original volumes except the base volume and the pool volume may be deleted, and the original volumes are replaced with virtual volumes accessible through the mapping table. As a result, the amount of data in a storage system can be reduced while maintaining data integrity and accessibility.

Method and apparatus for reducing the amount of data in a storage system

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Yokohama, Japan

Yuichi Yagawa