Hitachi, Ltd.

Hitachi Vantara Corporation

Hitachi Computer Peripherals Co., Ltd.

Hitachi Information & Telecommunication Engineering, Ltd.

Yoshinori Ohira

Takahiro Yamamoto

Hiroto Ebara

Masakuni Agetsuma

Akira Yamamoto

Hiroaki Akutsu

Junji Ogawa

Shigeo Homma

Takeru Chiba

Ryosuke Tatsumi

Hideo Saito

Shintaro Ito

Masanobu Yamamoto

Takaki Nakamura

Kenta Shiga

Shugo Ogawa

Yoshiaki Eguchi

Yoichi Mizuno

Tatsuya Hirai

Shoji Kodama

Norio Shimozono

Yasuo Watanabe

Katsuhiro Uchiumi

Sachie Tajima

Koji Hosogi

Koji Iwamitsu

Yoshiaki Deguchi

Masayuki Yamamoto

Tomohiro Kawaguchi

Nobuhiro Maki

Yusuke Nonaka

Hitoshi Kamei

Shunji Kawamura

Yutaka Takata

Tomohiro Yoshihara

Wataru Okada

Makio Mizuno

Hiroshi Nasu

Hiroki Fujii

Mikio Fukuoka

Yoshihiro Yoshii

Masanori Takata

Azusa Jin

Kohei Tatara

Yuki Sakashita

Yutaka Oshima

Taisuke Ono

Koshi Hoshino

Yoshihiko Fujii

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 having both a high performance and high reliability is implemented. The storage system includes a plurality of storage nodes each including a processor and a memory, and a storage device. Each of the plurality of storage nodes includes a storage controller configured to run on the processor, the plurality of storage controllers include an active storage controller configured to process data output to and received from the storage device, and a standby storage controller configured to take over the processing of the data from the active storage controller, each of the active storage controller and the standby storage controller is allocated with a storage area of the memory, and the storage node changes an amount of a memory capacity allocated for the storage controller of the self-node when a state of the storage controller is switched between a standby state and an active state.

Storage system including storage nodes each including a storage controller configured to run on a processor

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 includes one or more storage nodes each having a non-volatile storage device, a storage controller, and a volatile memory, in which the storage device includes a plurality of base image storage areas including at least a first base image storage area and a second base image storage area as areas for storing entire predetermined information stored in the memory as a base image, and the storage controller starts processing to store a next base image in the second base image storage area when the base image storage with respect to the first base image storage area is complete, and reads out the storage-completed base image and restores the image to the memory in a case where the predetermined information is lost from the memory.

Storage system including storage nodes, storage controller processing data reading and writing, and volatile memory, and storage control method

Provided is a storage system and a storage management method, aiming at reducing data movement amount necessary for using an expanded capacity in a distributed RAID. When only A (A is a positive integer) physical storage drives are added, a storage controller selects virtual parcels that are mapped to different physical storage drives among N physical storage drives and are included in different virtual chunks, changes an arrangement of the selected virtual parcels to the added A physical storage drives, and constitutes a new chunk based on unallocated virtual parcels selected from different physical storage drives among the (N+A) physical storage drives.

Storage system and storage management method

A storage system having high performance and high reliability includes a non-volatile storage device, a storage controller configured to control data to be read and written from and to the storage device using a storage function; and a volatile memory. In the reading and writing, the storage controller generates a log and stores the log in a log memory, writes the log stored in the memory to the storage device, and collects a capacity of the storage area of the memory storing the log written to the storage device. In collecting a free area of the memory, the storage controller executes a base image saving method of writing in the storage device in units of storage areas having a plurality of logs and collecting a free area, and a garbage collection method of writing in the storage device in units of logs and collecting a free area.

Storage system and storage control method including storing a log related to the stored data

A storage system includes one or more storage units, and a calculator. Each of the one or more storage units has plural physical storage devices, and a processor. The calculator has a controller that processes data inputted to and outputted from the storage unit by the processor. The storage system subjects the data to redundancy and stores the redundant data, and when a failure in which the data related to a read request cannot be read from one of the physical storage devices has occurred, reads the data from the readable physical storage device, recovers the data related to the read request, and transmits the recovered data to a request source of the read request. A process for recovering the data related to the read request from the read data can be selectively executed by the controller of the calculator and the processor of the storage unit.

Storage system and storage system control method

A first controller manages first mapping information for accessing data stored in a storage area, management of which is assigned to the first controller, and second mapping information for accessing data stored in a predetermined storage area, management of which is assigned to a second controller. The second controller, when having executed garbage collection on the predetermined storage area, changes mapping information to post-migration mapping information for accessing data after being migrated by the garbage collection. The first controller acquires the post-migration mapping information from the second controller, and updates the second mapping information using the post-migration mapping information when information in the second mapping information and is to be used for accessing the data in the predetermined storage area has been updated accompanying the garbage collection when the first controller accesses the data in the predetermined storage area after the garbage collection by using the second mapping information.

Storage system and data management method

A compound storage system including: a storage box having a plurality of storage devices; and a plurality of servers capable of executing one or more virtual machines. The storage box stores a logical volume. The virtual machines executable by the server include an application VM and a controller VM. When a predetermined situation occurs in which an application VM of a migration source server is migrated to a predetermined migration destination server, at least one processor of the one or more servers in the compound storage system migrates the application VM to the migration destination server, and migrates a control right of a logical volume used by the application VM to a controller VM of the migration destination server.

Compound storage system

A distributed storage system includes one or a plurality of storage units including a plurality of physical storage devices, and a plurality of computers connected to the one or plurality of storage units via a communication network. When receiving a write request for a logical volume, the computer writes write data corresponding to the write request and redundant data for making the write data redundant in a plurality of physical storage devices of the storage unit in a distributed manner, and collectively controls writing of a journal of write data for managing a write history of the write data and a journal of redundant data for managing a write history of the redundant data.

Distributed storage system and storage control method

The invention is to efficiently exchange storage programs. A storage program in an active state and a storage program in a standby state in a storage program group each change metadata thereof when the storage program in the active state writes data. When update of the storage programs including arranging post-update storage programs in storage nodes and generating new-version metadata based on old-version metadata by the post-update storage programs is to be performed, the post-update storage program in the standby state generates the new-version metadata based on the old-version metadata is performed for the storage programs in the plurality of storage nodes while replacing the active state and the standby state of the storage programs with each other in the plurality of storage programs in the storage program group.

Storage system and storage program update method

In a complex system including; one or more storage systems including a cache and a storage controller; and one or more storage boxes including a storage medium, the storage box generates redundant data from write data received from a server, and writes the write data and the redundant data to the storage medium. The storage box transmits the write data to the storage system when it is difficult to generate the redundant data or it is difficult to write the write data and the redundant data to the storage medium. The storage system stores the received write data in the cache.

Complex system and data transfer method

A storage system monitors the first access frequency of occurrence which is the access frequency of occurrence from a host device during a first period, and the second access frequency of occurrence which is the access frequency of occurrence from a host device during a second period shorter than the first period. Along with performing data relocation among the tiers (levels) in the first period cycle based on the first access frequency of occurrence, the storage system performs a decision whether or not to perform a second relocation based on the first access frequency of occurrence and the second access frequency of occurrence, synchronously with access from a host device. Here the threshold value utilized in a decision on whether or not to perform the first relocation is different from the threshold value utilized in a decision on whether or not to perform the second relocation.

Storage system for migrating data between tiers

One or a plurality of physical storage devices that provide a physical storage area are connected to first and second computers. The computer updates metadata indicating the address correspondence relationship between the logical address of the volume and the physical address of the physical storage area in the write processing performed based on a write request designating the volume. The first computer copies the metadata to the second computer while receiving the write request. When the address correspondence relationship indicated by the copied metadata portion is changed during copying of the metadata, the first computer updates the metadata portion and copies the metadata portion to the second computer.

The computer system includes a node including a processor and a memory, and the processor and the memory serve as arithmetic operation resources. The computer system has an application program that operates using the arithmetic operation resources, and a storage controlling program that operates using the arithmetic operation resources for processing data to be inputted to and outputted from a storage device by the application program. The computer system has use resource amount information that associates operation states of the application program and the arithmetic operation resources that are to be used by the application program and the storage controlling program. The computer system changes allocation of the arithmetic operation resources to the application program and the storage controlling program used by the application program on the basis of an operation state of the application program and the use resource amount information.

Computer system and resource reallocation method

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Tokyo, Japan

Yoshinori Ohira