Fujitsu Corporation

Toshihiro Ozawa

Yasuo Noguchi

Masahisa Tamura

Tatsuo Kumano

Munenori Maeda

Kazutaka Ogihara

Kazuichi Oe

Ken Iizawa

Jun Kato

Takashi Watanabe

Yoshihiro Tsuchiya

Miyoshi Saito

Atsuhiro Suga

Hisanori Fujisawa

Tsuyoshi Takeuchi

Ken Ilzawa

A storage system includes a storage device that stores divided data which represents data which is obtained by division of data in a time series; a server device that acquires a first time, searches interval-related information for an interval that overlaps an interval between the first time and a second time following the first time by a specified duration of time, the interval-related information storing information in which identifying information that identifies the divided data and information that relates to intervals which indicate start times and end times of the divided data are associated, and acquires identifying information for the divided data that corresponds to the interval for which the search was performed; and a terminal device that acquires from the storage device the divided data that corresponds to the acquired identifying information and reads out the acquired divided data in chronological order.

Storage system, recording medium for storing control program and control method for storage system

A storage controller is coupled to a plurality of storage devices, the storage controller is configured to receive a first write request of data, determine a first time when the first write request is received, specify, based on the first time, a first storage device included in the plurality of storage devices, write the data into the first storage device, receive a read request for the data, determine a second time when the read request is received, specify a second storage device included in the plurality of storage devices, wherein, in anticipation of a second write request received at the second time, the processor specifies the second storage device based on the second time, determine whether the first storage device is identical to the second storage device, and not read the data from the first storage device when the first storage device is identical to the second storage device.

Storage controller, method, and storage system

A method of storing data using a first storage apparatus, a second storage apparatus, and a third storage apparatus coupled with each other through a network, includes as followings. The first storage apparatus receives a processing request of first data and second data. The first storage apparatus includes the first data as data to be addressed to the second storage apparatus, and the second data as data to be addressed to the third storage apparatus in one packet. The first storage apparatus transmits the one packet to the second storage apparatus. After transmitting the first data and the second data, the second storage apparatus transmits the second data to the third storage apparatus.

Method of storing data, storage system, and storage apparatus

A computer includes a memory that stores a program and received data; and a processor that executes an operation by executing the program stored in the memory, the operation including storing the received data into a first database having a first data structure in which reading is performed in a random access manner and writing is performed in a sequential access manner, when the received data is received from a second apparatus is as same as data stored in a first apparatus which has a failure, and copying the received data stored in the first database to a second database having a second data structure in which reading is performed in a sequential access manner and writing is performed in a random access manner.

Computer, data storage method, and information processing system

A controlling method executed by a processor included in an information processing apparatus, the controlling method includes storing identifiers of information processing apparatuses and identifiers of groups, each of the information processing apparatuses belonging to at least one of the groups, a group among the groups storing replications of one or more identifiable data; and detecting, by the information processing apparatus, a failure of other information processing apparatus belonging to one or more groups among the groups to which the information processing apparatus executing the detecting of the failure belongs, based on the identifiers of information apparatuses and the identifiers of groups.

Controlling method, information processing apparatus, storage medium, and method of detecting failure

A transfer data block is selected, and a data file including the transfer data block is selected as a transfer data file. All the data blocks of the transfer data file are added to the transfer data block. When all the data files including each transfer data block is selected as a transfer data file, the transfer data block is selected as a deletion data block. When a total data amount of the deletion data block is larger than or equal to a predetermined target deletion data amount and a ratio of a total data amount of the transfer data block to the total data amount of the deletion data block is smaller than or equal to a predetermined value, the data file is transferred from a transfer source node to a transfer destination node. Accordingly, a storage can be used efficiently.

Transfer control device, non-transitory computer-readable storage medium storing program, and storage apparatus

A first information processing apparatus transmits a message storing a replica of data stored in the first information processing apparatus. The message has an unspecified destination. A first relay apparatus detects a second information processing apparatus provided in a network to which the first relay apparatus belongs. The first relay apparatus selects, as a transfer destination of the message, the second information processing apparatus or a second relay apparatus upon receiving the message. The first relay apparatus transfers the message to the selected transfer destination. The second information processing apparatus stores the replica therein upon receiving the message.

Replica deployment method and relay apparatus

A storage apparatus is provided, including a first storage unit; a load information obtaining unit that obtains load information for each of a plurality of portions defined by dividing the first storage unit; a portion identifying unit that identifies a candidate portion that is to be relocated in the first storage unit based on the load information; a determining unit that determines whether or not data in the candidate portion is allowed to be migrated to a second storage unit, the second storage unit having a performance value higher than a performance value of the first storage unit; an adder that adds the second storage unit, when the determining unit determines that the data in the candidate portion is not allowed to be migrated; and a relocation unit that migrates the data in the candidate portion from the first storage unit to the added second storage unit.

Storage pool-type storage system, method, and computer-readable storage medium for peak load storage management

A storage device being one of a plurality of storage devices storing data includes a memory and a processor coupled to the memory. The processor executes determining, when having received a new request and a new priority information during a preparation for an execution of another update processing, whether a new priority indicated by the new priority information is higher than a priority of the update processing in the preparation. The process including canceling the update processing in the preparation when having determines at the determining that the new priority is higher than the priority of the update processing in the preparation. The process includes forwarding the new request and the new priority information to another storage device when having determined at the determining that the new priority is higher than the priority of the update processing in the preparation.

Storage device, computer-readable recording medium, and storage control method

A computer-readable recording medium stores a program that causes a computer to execute a writing control process that includes receiving a writing request to write a first data to a first storage apparatus; determining a second data from among a series of data and based on a writing sequence of the series of data written to the computer and a count of storage areas at a second storage apparatus that sequentially selects from among the storage areas when data is received, a storage area to be over written by the received data, where the second data is written to the first storage apparatus and is identical to data that is stored in the storage area to be selected next at the second storage apparatus; and transmitting copy data of the first data to the second storage apparatus, when the second data has been written to the first storage apparatus.

Computer product, writing control method, writing control apparatus, and system

A replication system includes N (&#x3e;=3) storage devices and N nodes, connected to a host via a 1st network and connected to the N number of storage devices via a 2nd network, each to receive a request for accessing a storage device associated with itself and to have an access with a content in response to the received access request to the storage device, wherein when a node receives a write request of data from the host, each of M nodes (1&#x3c;M&#x3c;N) including the node stores the data in the storage device associated with itself, and if first data in a first storage device cannot be read out, the first data stored in another storage device is stored into a second storage device not stored with the first data by transmitting the first data via the second network.

Replication system and method of rebuilding replication configuration

An internode put requesting unit detects a time-out with respect to a put request issued to the next node in the order of a multiplexing chain and notifies a put/get executing unit of the time-out. The put/get executing unit sends an error to the previous node in the order of the multiplexing chain or a client and instructs a put-failed-data synchronizing unit to synchronize data failed to be put, and the put-failed-data synchronizing unit performs a synchronization process. A primary makes other put requests wait until completion of the synchronization process. Furthermore, when having received the error, the client issues a get request to the tail end of the multiplexing chain.

Computer-readable recording medium, data management method, and storage device

Multiple storage apparatuses are provided, at least part of which are individually incorporated into one of storage groups. Each of multiple control apparatuses is configured to, when assigned one or more of the storage groups each including one or more of the storage apparatuses, control data storage by storing data designating each assigned storage group redundantly in the storage apparatuses of the assigned storage group. An information processing apparatus is configured to, when a storage group with data redundancy being lost is detected, make a change in control apparatus assignment for the storage groups in such a manner that a storage group different from the detected storage group is not assigned to a control apparatus with the detected storage group assigned thereto. Subsequently, the information processing apparatus causes the control apparatus to execute a process of restoring the data redundancy of the detected storage group.

Method and system for storage management

A storage system having a plurality of storages. The each of the storages include a memory and a processor coupled to the memory. The processor executes a process including transmitting an update request for data which is commonly stored in the plurality of storages according to a predetermined transmission order indicating a path to transfer the update request. The process includes updating data when receiving an update request from another storage. The process includes changing the predetermined transmission order to a transmission order in which one or more storages included in the path are excluded according to the number of times the update request for the data is received.

Storage system and storage device

An information processing system includes: CPUs; storage devices; switches; dummy storage devices which are with respective storage devices and each of which sends, when receiving an identifying information request, its own identifying information back to a sender of the identifying information request; and dummy CPUs which are associated with respective CPUs and each of which tries to, when receiving an instruction for acquiring identifying information from a dummy storage device, acquire the identifying information of the dummy storage device by transmitting the identifying information request, and sends the identifying information as response information back to a sender device of the acquiring instruction.

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Yokohama, Japan

Toshihiro Ozawa