Hitachi, Ltd.

Hitachi Vantara Corporation

Masakuni Agetsuma

Takahiro Yamamoto

Takaki Nakamura

Hiroto Ebara

Hideo Saito

Shintaro Ito

Yoshinori Ohira

Takeru Chiba

Sachie Tajima

Takahiro Nakano

Hitoshi Kamei

Yuko Matsui

Takanobu Suzuki

Jun Nemoto

Akira Yamamoto

Masaaki Iwasaki

Yohsuke Ishii

Tatsuya Hirai

Akihiko Araki

Etsutaro Akagawa

Azusa Jin

Hiroaki Akutsu

Masanori Takata

Akihiro Urano

Yasuo Yamasaki

Akihiro Hara

Yuki Sakashita

Tomonori Esaka

Akira Deguchi

Shoji Kodama

Yusuke Nonaka

Tsukasa Shibayama

Masanori Takada

Makio Mizuno

Noboru Morishita

Ryosuke Tatsumi

Nobumitsu Takaoka

Mikio Fukuoka

Akiyoshi Tsuchiya

Go Uehara

Kohei Tatara

Miho Imazaki

Akio Shimada

Soichi Takashige

Kazuhito Yokoi

Misato Yoshida

Youji Nakatani

Kaiho Fukuchi

Shinichiro Seki

Tomoki Sekiyama

Naoto Yanagi

To provide a data sharing system and a data sharing method that make it easy to suppress the disclosure of data whose disclosure is restricted according to the location where the data exists, in accordance with the provision of the disclosure restriction. A data sharing system comprising a storage node having virtual volumes accessed by a readout device, the data sharing system comprising: the storage node comprises: an access setting unit configured to restrict a target readout device from reading data from a target virtual volume in accordance with information on a location of the target readout device accessing the data sharing system and information on a location of the target virtual volume from which the target readout device attempts to read data.

Data sharing system and data sharing method

Provided is a storage system that performs inter-node movement of parity and reconfiguration of a stripe when a node configuration is changed. The storage system includes a plurality of nodes and a management unit, in which the nodes are targets for data write and read requests, form a stripe by a plurality of data stored in different nodes and parity generated based on the plurality of data, and store the parity of the stripe to which the data under the write request belongs in a node different from the plurality of nodes that store the plurality of data so as to perform redundancy; and the management unit transmits, to the node, an arrangement change request to perform the inter-node movement of the parity and the reconfiguration of the stripe when the node configuration is changed.

Storage system

In a storage system, a failover time is shortened while avoiding erroneous detection of a node failure according to network quality. The storage system includes a plurality of storage nodes having processors; a data storage device; the plurality of storage nodes having the processors for processing data to be input to and output from the storage device; and a network for connecting the plurality of storage nodes, wherein the plurality of storage nodes monitors the operation status of each other to perform node failure detection for determining the occurrence of a failure of the storage node on the basis of a time-out value, performs a failover process in which one of the other storage nodes takes over the process of the storage node when the failure occurs in the storage node, and adjusts the time-out value on the basis of the status of the network between the storage nodes.

Storage system and control method for adjusting timeout based on network conditions

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

To set an appropriate buffer area in a storage system that performs hierarchical storage management. The storage system includes a storage device that provides a storage pool and a storage management unit that manages the storage pool in a tiered manner. The storage pool is provided with a first tier, a second tier, a third tier, and a third tier buffer which is a buffer area used as a buffer when reading or writing data from or to the third tier which is a buffer target tier. The storage management unit determines a size of the third tier buffer based on an access frequency of the third tier.

According to one embodiment, provided is a storage management system having a processor and managing a plurality of storages, in which the storage has a plurality of types of components, and performs redundantization of a data to be stored by combining the plurality of components, the storage management system has component management information indicating redundancy set for the component itself, and the processor sets a method of data protection of the storage based on the component management information and a request for the data protection for the data stored in the storage.

Storage management system and management method

In a storage system in which a plurality of pieces of control software constituting a redundancy group are distributedly arranged in a plurality of storage nodes, control software in an active state out of the plurality of pieces of control software constituting the redundancy group receives a write request from a higher-level device. The control software in the active state writes data related to the write request by mirroring into a cache memory of a storage node in which the control software in the active state is arranged and a cache memory of a storage node in which control software in an inactive state belonging to the same redundancy group is arranged. The control software in the active state sends a write completion response to the higher-level device, and redundantly stores the data written in the cache memories in a storage device.

Storage system and data processing method

When a communication protocol is changed, the I/O function can be appropriately provided. In a computer system, a storage node includes a CPU and a storage control program that performs communication relating to data I/O. The storage control program has a first storage control program that is capable of using a first communication protocol, and a second storage control program that is capable of using the first communication protocol and a second communication protocol. The control node the control node causes, when any storage node of the plurality of storage nodes is capable of executing the first storage control program alone, all storage nodes to perform communication using the first communication protocol. The control node causes, after all storage nodes of the plurality of storage nodes are enabled to execute the second storage control program, the all storage nodes to perform communication using the second communication protocol.

Computer system and communication management method

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

A storage system includes a plurality of storage nodes. The storage node includes: one or more storage devices which respectively provide a storage area; and one or more control software which read/write requested data from/into the corresponding storage device according to a request from a higher-level device, wherein each of the control software retains predetermined configuration information required for reading/writing requested data from/into the corresponding storage device according to a request from the higher-level device, wherein a plurality of the control software are managed as a redundancy group, and the configuration information retained in each of the control software belonging to the same redundancy group is synchronously updated, and wherein the plurality of control software configuring the redundancy group are each deployed in respectively different storage nodes so as to distribute a load of each of the storage nodes.

Storage system and control software deployment method

A scale-out storage system includes a plurality of computer nodes each of which has a memory and a processor, and a storage apparatus. The computer nodes have one or more redundancy groups each of which is a group for metadata protection. Each of the one or more redundancy groups includes two or more of the computer nodes including a primary node being a primary computer node and a secondary node being a secondary computer node, and a failover is performed from the primary node to the secondary node. The memory of the primary node has stored therein metadata related to the redundancy group and to be accessed for control. The metadata is redundantly stored in the memory of the primary node and the memory of the secondary node.

Scale-out storage system and storage control method

Each redundancy group is constituted by one active program (storage control software of the active program) and N standby programs (N is an integer of two or more). Each of the N standby programs is associated with a priority to be determined as a failover (FO) destination. In the same redundancy group, FO is performed from the active program to the standby program based on the priority. For the plurality of pieces of storage control software including the active programs and the standby programs that change to be active by FO in the plurality of redundancy groups arranged in the same node, standby storage control software that can set each of the programs as a FO destination are arranged in different nodes.

Storage system and control method therefor

In an information processing system, a storage control server (storage control node) that has received a read request of data from a compute server (compute node) transmits the read request to a drive box. The drive box that has received the read request from the storage control server reads encrypted read target data corresponding to the read request from non-volatile storage media, decrypts the read target data with key data acquired at a predetermined timing, and then transmits the decrypted read target data to the compute server as a read request source.

Information processing system and data transfer method

The storage part receives an I/O request including the ID of software, information regarding a storage area to and from which the software performs input and output, and a token. The storage part checks the I/O request against the software ID, the information regarding the storage area, and the token received from an I/O control part so as to determine whether access to the storage part is allowed. Upon determination that the access to the storage part is allowed, the storage part processes the I/O request.

Information processing system and information processing method

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Tokyo, Japan

Masakuni Agetsuma