Hitachi, Ltd.

Hitachi Vantara Corporation

Norio Shimozono

Kazuyoshi Serizawa

Akira Deguchi

Yasutomo Yamamoto

Sadahiro Sugimoto

Naoko Iwami

Takao Sato

Hisaharu Takeuchi

Tomohiro Yoshihara

Kiyoshi Honda

Hisao Homma

Shintaro Ito

Hirotoshi Akaike

Yoshiaki Eguchi

Hiroaki Akutsu

Koji Hosogi

Nobuhiro Yokoi

Kohei Tatara

Tadato Nishina

Akira Yamamoto

Yoshinori Ohira

Shunji Kawamura

Yasuo Watanabe

Makio Mizuno

Noboru Morishita

Ryosuke Tatsumi

Yoshihiro Yoshii

Kazuei Hironaka

Shintaro Kudo

Masayuki Yamamoto

Akira Fujibayashi

Takahiro Yamamoto

Junji Ogawa

Tomohiro Kawaguchi

Kazuhisa Fujimoto

Shinichi Hayashi

Atsushi Kawamura

Takayuki Nagai

Mitsuo Hayasaka

Katsuya Tanaka

Wataru Okada

Takeru Chiba

Naoya Okada

Tomoki Sekiguchi

Takanobu Suzuki

Takaki Matsushita

Yasuyuki Nagasoe

Kazuki Matsugami

Masahiro Tsuruya

Hirofumi Inomata

Futoshi Haga

Kazushi Nakagawa

Machiko Asaie

Yuto Kamo

Akihiro Hara

Kenichi Betsuno

Mutsumi Hosoya

In a computer system including a plurality of storage nodes and a control node, in a case where a storage system is deployed to a new storage node, the control node templates configuration information of an existing storage node by using a template deployment service, the control node sets a plurality of initial setting nodes, and causes the plurality of initial setting nodes to perform in parallel initial setting of converting and storing data of the existing storage node by using the template in a plurality of disks to be connected to a new storage node, and the new storage node is connected to the disks in which the initial setting is performed, and imports configuration information of the existing storage so that the storage system is deployed.

Computer system and management method for computer system

A storage system includes a plurality of drive nodes, a plurality of controller nodes controlling data from a host device to the plurality of drive nodes, and a processor that calculates long-term load fluctuation prediction as prediction of load fluctuation over a certain period of time in the future of the plurality of controller nodes based on time-series data of load of the plurality of controller nodes, and calculates an addition/reduction completion target time to complete addition or reduction of an operating controller node out of the plurality of controller nodes based on the long-term load fluctuation prediction and a load threshold value determined from a power performance model representing a relationship between the load and energy efficiency of the plurality of controller nodes.

Storage system and method for predictive rebalancing and controller node management based on load prediction

A storage system with reduced power consumption includes a storage apparatus that saves data in accordance with a data input/output request from a host or outputs the saved data, the storage system including a plurality of components each configured to operate in a first power mode or at least one second lower power mode in a switchable manner, a condition monitoring module monitoring each of the plurality of components, and a power mode control module that determines a power mode of at least one component to be the second power mode, according to a processing load related to each of the plurality of components and which corresponds to a result of monitoring by the condition monitoring module, and operates the at least one particular component in the power saving mode, in which the plurality of components perform mutual control with the storage apparatus in accordance with the data input/output request.

Storage system and a method of controlling energy consumption therein

A first node performs copy (virtual copy) of address mapping between a virtual volume and a pool to a first virtual volume to create a third virtual volume in the first node. A second node performs mapping from a first pool volume in the second node to the third virtual volume in the first node, links an address of the first pool volume, which is mapped to the third virtual volume, to an address of a second virtual volume in the second node on a one-to-one basis, and performs log-structured write of the data in the second virtual volume to a second pool volume in the second node.

Storage system and memory control method

The present invention makes it possible to maintain availability and scale out file performance, while suppressing costs. A unified storage has a plurality of controllers and a storage apparatus (storage device unit), and each of the plurality of controllers is equipped with one or more main processors (CPU) and one or more channel adapters (FE-I/F). Each main processor causes a block storage control program to operate and thereby process data inputted to and outputted from the storage apparatus, each channel adapter has a processor (CPU) that performs transmission and reception to and from a main processor after receiving an access request, and the processors in the plurality of channel adapters cooperate to cause a distributed file system to operate, and distributively store data, written as a file, to the plurality of controllers.

Unified storage and method of controlling unified storage

Logical hierarchies include an append hierarchy in a storage device. The storage device writes user data received in the append hierarchy to a free area, select a garbage collection operation mode for a first logical area in the append hierarchy from operation modes including first and second operation modes. Conditions of executing the garbage collection in the first operation mode include a capacity of the free area in the append hierarchy being less than a threshold, and an amount of garbage that is invalid data after update in the first logical area being equal to or greater than a threshold. Conditions of executing the garbage collection in the second operation mode include the amount of garbage in the first logical area being equal to or greater than a threshold value, while excluding the condition of the capacity of the free area in the append hierarchy.

Storage device

A storage system includes at least one drive chassis connected to at least one host computer via a first network, and a storage controller connected to the drive chassis, in which the storage controller instructs the drive chassis to create a logical volume, and the drive chassis creates a logical volume according to an instruction from the storage controller, provides a storage area of the storage system to the host computer, and receives an IO command from the host computer to the storage area of the storage system.

Storage system and data transfer method

In a storage system, attributes of nodes are specified as first attribute nodes and second attribute nodes, the I/O processing in the nodes is executed as a plurality of processes including front-end I/O processing executed by any of the first attribute nodes and back-end I/O processing executed by the first and second attribute nodes having a storage device that stores data relating to the I/O processing.

Storage system and node management method

The processor provides a host computer with a logical volume based on a physical storage device. Based on a command from the host computer, the control device writes, into a memory, address information that associates a logical address in the logical volume with a device address in the physical storage device. The control device receives a command from the host computer and if it is determined that the command is a read command, identifies a first logical address designated by the command and determines whether or not the first logical address is included in the address information. If the first address is included in the address information, the control device specifies a first device address corresponding to the first logical address, reads read data stored in an area indicated by the first device address, and transmits the read data to the host computer.

Storage apparatus, computer system, and method for improved read operation handling

A storage system includes a plurality of controllers each including a processor module and a memory, and a relay unit to relay a communication between the processor modules. The relay unit executes assignment determination to determine one of the processor module of a first controller and the processor module of a second controller is a processor module processing a command stored in the memory. The first controller includes memory storing the command, and the second controller is any of the controllers other than the first controller. When the relay unit determines the command of the processor module of the first controller, the relay unit notifies storage location information of the command to the processor module of the first controller, and when the relay unit determines the command to be processed by the processor module of the second controller, the relay unit transfer the command to the second controller.

Storage system, storage control method, and relay device

A storage system is adapted for efficiency by defining beforehand a first size, which is the maximum data that can be read at one time, a second size, which is equal to or less than the first size, and a third size, which is a factor of the first size. A controller provides a virtual volume comprising a plurality of virtual pages. Upon receiving a write request, the controller allocates a pool area comprising a plurality of stripes of the first size, stores the write request data in a cache, and when writing the data stored in the cache to the storage device, compresses the data in accordance with the third size unit, selects a storage area in accordance with the second size unit, and writes the compressed data to the selected second size storage area sequentially from the start address of a free area without leaving spaces therebetween.

Efficient management storage system via defining of several size units in advance

If resources allocated to a host computer exist in different physical storage nodes within a virtual storage system after performing migration to a storage system, mapping of resources among the physical storage nodes becomes necessary, and if the amount of communication between physical storage nodes that occurs during access to resources exceeds a bandwidth of the connection path, the host I/O performance may be deteriorated compared to the performance before migration. Therefore, when migration is performed from a first physical storage node to a virtual storage system composed of a plurality of second physical storage nodes, a management computer allocates resources of the second physical storage nodes within a range of bandwidth of the transfer path between the second physical storage nodes based on configuration information of the plurality of second physical storage nodes, performance information, and load information of the volume provided by the first physical storage node.

Transfer format for storage system, and transfer method

A storage system according to the present invention has a plurality of flash packages equipped with a deduplication function. When a storage controller transmits a write data and a feature value of write data to a flash package, the flash package compares contents of the write data with data having a same feature value as the feature value of the write data. As a result of the comparison, if there is no corresponding data, the write data is stored in the flash memory, but if there is a corresponding data, the new data will not be stored. Thus, a greater number of data can be stored in the flash memory while preventing deterioration of performance.

Storage system

Growing community of inventors

Machida, Japan

Norio Shimozono