Hitachi, Ltd.

Other

Yoshiaki Eguchi

Yasutomo Yamamoto

Ai Satoyama

Takashige Iwamura

Kouji Arai

Shunji Kawamura

Hiroshi Arakawa

Kazuhiko Mogi

Kenta Ninose

Akira Yamamoto

Masayuki Yamamoto

Yasuo Watanabe

Tomohiro Kawaguchi

Hiroaki Akutsu

Akinobu Shimada

Noboru Morishita

Hideo Saito

Hisao Homma

Hiroshi Ohno

Takahiro Nakano

Takashi Oeda

Kazuyoshi Serizawa

Yoichi Mizuno

Kazuhisa Fujimoto

Toshio Nakano

Yutaka Takata

Hideo Tabuchi

Daisuke Orikasa

Ken Matsuda

Akira Deguchi

Yasuyuki Nagasoe

Manabu Kitamura

Norifumi Nishikawa

Koji Sonoda

Yusuke Hirakawa

Yoshinori Ohira

Norio Shimozono

Hisaharu Takeuchi

Masanori Takada

Hideomi Idei

Tetsuya Maruyama

Takashi Horiuchi

Kohei Tatara

Takayuki Fukatani

Junji Ogawa

Nobuhiro Maki

Shoji Kodama

Yasuyuki Mimatsu

Naoko Iwami

Kenta Shiga

Sadahiro Sugimoto

Shigeo Homma

Keishi Tamura

Yoshinori Okami

Isao Takita

Takahiro Fujita

Naoya Hattori

Miho Imazaki

Katsumi Hirezaki

Toyohiro Nomoto

Yoshifumi Mimata

Azusa Sudo

Yasunori Kaneda

Yusuke Nonaka

Junichi Hara

Takao Satoh

Shinichi Kato

Hiroshi Nasu

Yasushi Nagai

Hirokazu Ikeda

Toru Owada

Toshimichi Kishimoto

Azusa Jin

Itaru Nonomura

Hideaki Monji

Tsuyoshi Aoyama

Shinichi Sawamura

Shin'ichi Sawamura

Provided is a storage system capable of avoiding the increase in communication between nodes in the coordination of the file service and the block service. This is a storage system in which a plurality of nodes, which provide a file service for performing I/O in file units and a block service for performing I/O in block units, are connected via a network, and the storage system comprises a management unit which manages the first file processing unit and the second file processing unit as a pair, sets the first file processing unit to be operable, manages the first block processing unit and the second block processing unit as a pair, and sets the first block processing unit to be operable.

Storage system node communication

Storage system and method of storing data in nodes

A management target constituting the target of processing executed by a first storage system in accordance with a request transmitted from a higher-level device is managed by first and second management identifiers. A request designating the first management identifier is received from the higher-level device, and a first management identifier designated by the request is converted into a corresponding second management identifier.

Control device for storage system capable of acting as a constituent element of virtualization storage system

Starting a host computer and a high-speed data transfer achieved by NVMe are both realized. When the host computer is started and a command for instructing to read an OS in accordance with a specific protocol is issued from the host computer via a host-side bus to a specific function from among a plurality of functions, an interface device issues to a controller a request for instructing to read the OS and transfers the OS read by the controller to the host computer. When an NVMe command for instructing an I/O for the controller in accordance with an NVMe protocol is issued from the host computer via the host-side bus to an NVMe function from among a plurality of functions after the host computer is started, the interface device issues to the controller an I/O request based on the NVMe command.

Storage apparatus and interface apparatus

A plurality of storage apparatuses including a first and second storage apparatus, wherein said first storage apparatus is configured to have a first virtual volume composed of a plurality of virtual segments, at least said second storage apparatus is configured to have a pool composed of a plurality of real pages, each storage apparatus is configured to manage a virtual pool comprising one or more pools including at least said pool, said virtual pool is composed of a plurality of virtual pages, each virtual page corresponding to any real page, and said first storage apparatus is configured to receive a write command that specifies an address belonging to an unallocated virtual segment, allocate a free virtual page to said unallocated virtual segment, and write data to the real page corresponding to the allocated virtual page, even when said first storage apparatus does not have a pool composed of real pages.

Storage system including multiple storage apparatuses and pool virtualization method

Failures in a storage system are managed at low cost and with high reliability. A storage system is coupled to a file command issuing apparatus and a block command issuing apparatus, and processes commands from both. The storage system is provided with: a first control portion which is provided extending across a plurality of clusters and which is configured to control block access requests to a disk device; a plurality of second control portions which are configured to process file access requests and provided respectively in the clusters, and operate on virtual machines managed by a virtualization control portion; failure detecting portions which are configured to detect failures within each of the clusters; and a failure information management portion which is provided in the first control portion and which is configured to consolidate and manage failure information relating to failures detected by the failure detecting portions.

Storage system which is capable of processing file access requests and block access requests, and which can manage failures in A and storage system failure management method having a cluster configuration

In conventional unified storage systems, an I/O for block storage and an I/O for file storage are processed in a single OS without being distinguished, so that it was not possible to perform processes for speedy failure detection or for enhancing performances such as tuning of performance by directly monitoring hardware. The present invention solves the problem by having a block storage-side OS and an OS group managing multiple systems including a file system other than the block storage-side OS coexist within a storage system, wherein the OS group managing multiple systems including a file system other than the block storage-side OS is virtualized by a hypervisor, wherein a block storage micro-controller and the hypervisor can cooperate in performing processes.

Storage system and method for allocating resource

A storage system connected to a computer and a management computer, includes storage devices accessed by the computer, and a control unit for controlling the storage devices. A first-type logical device corresponding to a storage area set in at least one of the storage devices and a second-type logical device that is a virtual storage area are provided. The control unit sets at least two of the first-type logical devices different in a characteristic as storage areas included in a storage pool through mapping. The first-type logical device stores data by allocating a storage area of the second-type logical device to a storage area of the first-type logical device mapped to the storage pool. The characteristic of the second-type logical device can be changed by changing the allocated storage area of the second-type logical device to a storage area of another first-type logical device.

Data management method in storage pool and virtual volume in DKC

The storage system includes a plurality of storage devices. A storage controller is configured to manage a plurality of pages in a pool provided by at least one of the plurality of storage devices, to provide a virtual storage area to a host by allocating one or more pages from the pool dynamically, in which the virtual storage area is formed with a data area and a control information area. The storage controller is further configured to expand the virtual storage area on a unit basis, where the unit is a set of a given size area of the data area and a given size area of the control information area. In response to a write request from the host, the storage controller is configured to store data into the data area and to store control information for accessing to the data into the control information area.

Storage apparatus and control method thereof

A shared device unit, which comprises a storage device, is coupled to a plurality of storage systems. The shared device unit provides a plurality of storage areas, which are based on the storage device, to the plurality of storage systems. Each storage system stores allocation management information which comprises an ID of a storage area provided to thereof among the plurality of storage areas, and provides the storage area corresponded to the ID included in the allocation management information to the host computer coupled thereto among the plurality of host computers.

Compound storage system and storage control method

The present invention transfers replication logical volumes between and among storage control units in a storage system comprising storage control units. To transfer replication logical volumes from a storage control unit to a storage control unit, a virtualization device sets a path to the storage control unit. The storage control unit prepares a differential bitmap in order to receive access requests. When the preparation completes, the virtualization device makes access requests to the storage control unit. The storage control unit hands over the access requests to the storage control unit. The storage control unit performs a process so that the access requests are reflected in a disk device and performs an emergency destage of storing data in a cache memory into disk device. When the emergency destage ends, the storage control unit connects to an external storage control unit and hands over access requests to the external storage control unit.

Logical volume transfer method and storage network system

If a monitor measurement cycle is set as a long cycle, promotion in a short cycle cannot be performed; and even if the number of I/Os is very large in response to fluctuations of the number of I/Os in several minutes to several hours of normal work, pages will be promoted after waiting for several weeks. As a result, I/Os which could have normally accepted by an upper tier will be accepted by a lower tier, which results in a problem of worsening the performance efficiency. A monitoring system capable of preventing demotion due to temporary reduction of the number of I/Os for specific pages from a viewpoint of a long cycle and enabling prompt promotion in response to an increase of the number of U/Os for 3 the specific pages is realized. A load index value defined from a viewpoint of a long cycle and a load index value defined from a viewpoint of a short cycle are updated based on the number of I/Os which is counted cyclically for each storage area. Promotion and demotion are implemented based on a value(s) calculated from these load index values.

Storage system and storage area allocation method having an automatic tier location function

Growing community of inventors

Yokohama, Japan

Yoshiaki Eguchi