Fujitsu Corporation

Masahisa Tamura

Yasuo Noguchi

Kazutaka Ogihara

Tatsuo Kumano

Yoshihiro Tsuchiya

Kazuichi Oe

Takashi Watanabe

Tetsutaro Maruyama

Toshihiro Ozawa

Munenori Maeda

Ken Iizawa

Jun Kato

Riichiro Take

Shigeyuki Miyamoto

Minoru Kamoshida

Minoru Kamosida

Satoshi Iwata

Toru Yokohata

Takeshi Miyamae

Seiji Toda

Hideki Sakurai

Satoshi Ikuta

Ken Ilzawa

Kazutaka Ogiwara

A blockchain method generates data on a new blockchain by linking a new block to data on a blockchain including a plurality of blocks linked together each being a set of data containing given information. The blockchain method may further includes: in generating a second block following a first block included in the data on the blockchain, identifying, among branch blocks approved prior to the generating of the second block, one or more blocks capable of being approved in parallel with the first block, and generating and registering, in a memory, the second block following the first block and the one or more blocks capable of being approved in parallel with the first block.

Blockchain program and blockchain method

An information processing system includes one or more processors configured to acquire a plurality of pieces of divided data generated by dividing the data, determine, in accordance with offset information, a first position of a first key point closest to a head position of each of the plurality of pieces of divided data, and a second position of a second key point closest to an end position of each of the plurality of pieces of divided data, generate first difference information indicating first data between the head position and the first position, and second difference information indicating second data between the end position and the second position, generate metadata to be used for decoding partial data, distribute the plurality of pieces of divided data to a plurality of nodes respectively together with the first difference information, the second difference information, and the metadata.

Information processing system and information processing method

An information processing apparatus includes: a memory configured to store a storage controlling program; and a processor configured to execute a process based on the storage controlling program, wherein the process includes: storing, in the memory, address information regarding an address of a unit region for which duplicate deletion of data was performed in the past and data information regarding data in the unit region as past information; generating, using the address information, first data information of a first unit region in a state in which duplicate deletion of data has been performed currently; and specifying a data region to be a target of garbage collection based on the data information in the past information and the generated first data information.

Information processing apparatus for specifying data region of garbage collection, information processing system and information processing method

An index generation request reception unit configured to receive an index generation request for stored data from one or more information processing apparatuses, and a determination unit configured to determine whether an index of data is generated or not in accordance with identification information attached to the index generation request are provided, so that writing of an object is efficiently processed.

Information processing apparatus and storage system

A non-transitory, computer-readable recording medium has stored therein a program for causing a computer to execute a process that includes: receiving packets captured from a network and allocating first groups in which the packets are classified in accordance with a first scheme to storage locations in a storage; allocating second groups in which the packets are classified in accordance with a second scheme to the storage locations in the storage; and selecting the second groups allocated to the storage as storage locations other than the storage locations to which the first groups to which the packets belong are allocated when the packets are classified in the second groups in accordance with the second scheme.

Packet control apparatus and packet control system

An information processing system includes a plurality of information processing apparatuses connected to each other, and communication is performed between the plurality of information processing apparatuses. Each of the plurality of information processing apparatuses includes a processor. The processor included in one of the plurality of information processing devices serving as a first information processing device receives, from each of second information processing devices other than the first information processing device, state information regarding each state of the plurality of information processing devices determined by the second information processing devices, determines each state of the plurality of information processing devices, based on the state information received from each of the second information processing devices, and transmits state information for transmission regarding the determined state of each of the plurality of information processing devices to each of the second information processing devices.

Information processing system, computer-readable recording medium having stored therein control program for information processing device, and control method of information processing system

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 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.

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Kawasaki, Japan

Masahisa Tamura