Fujitsu Corporation

Ken Iizawa

Tatsuo Kumano

Yasuo Noguchi

Masahisa Tamura

Munenori Maeda

Toshihiro Ozawa

Kazutaka Ogihara

Kazuichi Oe

Jun Kato

Takashi Watanabe

An information processing device includes: a memory; and a processor coupled to the memory, the processor being configured to: sort stream data buffered in units of wraps of a sequential recording medium, in a column order and a time order of the stream data, as primary data to be written into a primary wrap of the sequential recording medium; and control writing of the sorted primary data into the primary wrap, wherein the sorting of the stream data is configured to sort secondary data to be written into a secondary wrap that follows the primary wrap, in a reverse order of the column order and in the time order, and wherein the controlling of the primary data is configured to control writing of the sorted secondary data into the secondary wrap.

Information processing device, information processing system, and non-transitory computer-readable storage medium for storing program

A storage control apparatus controls a tape apparatus including a plurality of tape drives. The storage control apparatus is configured to calculate, when causing the tape apparatus to execute write processing of dividing write data into a predetermined size and writing to a plurality of magnetic tapes, a write start position of the write data for each of the plurality of magnetic tapes where the write start position being different in each of the plurality of magnetic tapes and instruct the tape apparatus with the write start positions, and specify, when a reading range is designated, a read start position indicating a head of data in the reading range for each magnetic tape, and instruct the tape apparatus to read data in the reading range in an order from a magnetic tape of which the read start position is closer to an end of the magnetic tape.

Storage control apparatus and storage control method

A control apparatus includes a processor configured to execute a procedure including: receiving, from a processing device, a reading request to read a first data piece among a plurality of data pieces included in a data set, the processing device executing a given process on each of the data pieces; reading the first data piece from a first storage tier among a plurality of hierarchical storage tiers having respective different reading capabilities; transmitting the read first data piece to the processing device in response to the reading request; measuring a processing time that the processing device takes to execute the given process; determine a storage tier that is to store the first data piece among the hierarchical storage tiers based on the reading capabilities and the measured processing time; and migrating the first data piece from the first storage tier to the determined storage tier.

Control apparatus and computer-readable recording medium having stored therein control program

An information processing device includes: a plurality of threads, each of the plurality of threads being configured to process any of a plurality of tasks, the plurality of tasks being obtained by dividing a job; and a control circuit configured to execute processing when designating a next task in scheduling for the plurality of threads, the processing including inquiring of an assignment destination thread out of the plurality of threads as to whether the next task is to be completed by a scheduled time, and preferentially assigning a task supposed to be completed by the scheduled time in the assignment destination thread, as the next task from among the plurality of tasks.

Information processing device, storage system, and non-transitory computer-readable storage medium for storing scheduling program

A storage apparatus acquires a data block including event data, time series information, first attribute information, and second attribute information. A first temporary accumulating unit and a second temporary accumulating unit temporarily accumulate the acquired data block in a first temporary storage unit and a second temporary storage unit, respectively. A first storing unit sorts a plurality of data blocks accumulated in the first temporary storage unit by the first attribute information and in a time series order identified from the time series information, and stores the sorted data blocks in a first storage unit. A second storing unit sorts a plurality of data blocks accumulated in the second temporary storage unit by the second attribute information and in a time series order identified from the time series information, and stores the sorted data blocks in a second storage unit.

Storage apparatus and data storage method

A first processor is configured to acquire measurement values of plural types of processing index values each indicating a state of processing loads on a storage control device, and plural types of access index values each indicating a state of loads of an access process performed for each of plural pieces of data stored in a first storage device. The first processor is configured to select a first access index value corresponding to a first processing index value when the acquired measurement value of the first processing index value exceeds a threshold value. The first processor is configured to move a first piece of data from the first storage device to a second storage device. The acquired measurement value of the first access index value for the first piece of data is higher than the acquired measurement value of the first access index value for any other piece of data.

Storage control device and storage control method

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 processor of a distribution device included in a storage system is configured to manage an initial write position and a current write position for each of a plurality of storage apparatuses. The initial write position varies for the storage apparatuses. The processor is configured to receive a write request and give an instruction for writing data to each of the storage apparatuses in accordance with the current write position by distributing the write request to each of the storage apparatuses. The processor is configured to manage offset information indicating a write position relative to a top of a storage device corresponding to the current write position for each of the storage apparatuses. The processor is configured to receive a read request and select, based on the offset information, one of the storage apparatuses so as to send the read request to the selected storage apparatus.

Storage system and method for managing storage apparatuses

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 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.

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Yokohama, Japan

Ken Iizawa