Fujitsu Corporation

Jun Kato

Yasuo Noguchi

Masahisa Tamura

Tatsuo Kumano

Munenori Maeda

Toshihiro Ozawa

Ken Iizawa

Kazutaka Ogihara

Kazuichi Oe

Kosuke Suzuki

Ken Ilzawa

A storage circuit stores a first correlation of each program between a transmission rate of information transmitted by each program and a usage rate of an arithmetic processing circuit for each program obtained from statistical information regarding the usage rate, the transmission rate, and a reception rate of information received by each program, and a second correlation of each program between the reception rate and the usage rate. The arithmetic processing circuit converts a guaranteed transmission rate obtained from a desired transmission rate into a first usage rate based on the first correlation, converts a guaranteed reception rate obtained from a desired reception rate into a second usage rate based on the second correlation, designates a target usage rate using a desired usage rate, the first and second usage rate; and allocates the target usage rate to each program.

Information processing device, information processing system, and information processing method

A network switch includes a field programmable gate array (FPGA) and a processor. The FPGA is configured to transfer a processing target packet to a transfer destination, based on transfer definition information, and to transfer a copy of the processing target packet to the processor. The processor is configured to delete an entry of the transfer definition information based on a transfer record information, and to update the transfer record information based on the copy of the processing target packet.

Network switch, non-transitory computer-readable storage medium, and control method

An information processing device includes: a cache memory; and a processor configured to: manage the number of times of reference to be used for deduplication control of a data block; store, among data blocks in the cache memory, a first management list in which the data block in which writing is requested and the number of times of reference is 1 is managed by a least recently used scheme, and, among the data blocks in the cache memory, a second management list in which the data block in which writing is requested and the number of times of reference is equal to or larger than 2 is managed by the LRU scheme; and in a case where a data block to be written is registered in the first management list when a write request is processed, maintain the data block registered in the first management list over the cache memory.

Information processing device and computer-readable recording medium having stored therein cache control program

An information processing apparatus includes a memory; and a processor coupled to the memory and configured to process a first processing request from a first virtual environment and a second processing request from a second virtual environment different from the first virtual environment, the first processing request and the second processing request being related to a storage device that stores data, collect information concerning the first processing request and the second processing request, and determine whether either of the first virtual environment and the second virtual environment is set as a processing target of a process to suppress a reduction in performance based on the collected information.

Information processing apparatus, control method and storage medium

A specifying unit specifies one or more dividing positions in input data. A common region compressing unit specifies compression positions in the input data corresponding to positions at which sizes from two ends of compressed, data are equal to or larger than a predetermined, size and corresponding to positions which sandwich adjacently-positioned dividing positions and of which a size therebetween is equal to or larger than the predetermined size and compresses former compression data that are arranged in a row in the input data on either side of each of the dividing positions and that are interposed between the compression positions. An individual region compressing unit compresses latter compression data that are separated fay any of the pieces of former compression data in the input data, based on the former compression data positioned adjacent to the piece of latter compression data and the piece of latter compression data.

Information processing apparatus, data compressing method, and computer-readable recording medium

A control device includes a cache memory configured to store a first, a second, a third and a fourth list, each of the first, the second, the third and the fourth list storing information indicating data stored in the cache memory, and each of the first, the second, the third and the fourth list being managed under a LRU algorithm, and when first data stored in the storage device is accessed, register first information indicating the first data into the first list, and when the first data is stored in the storage device, register second information indicating the first data into the second list, a processor coupled to the memory and configured to receive a first request for reading the first data, and based on the first request, move the first information from the first list to the third list, while remain the second information in the second list.

Control device, storage system and method

A storage control apparatus includes a cache memory, and a processor configured to access to a first area of the cache memory in accordance with a command, generate a first processing report identifying the first area, input the first processing report to a processing report queue when a plurality of second processing reports each of which identifies the first area are not stored in the processing report queue, execute management list update processing in which the access to the first area is recorded in a management list in accordance with the first processing report, identify data to be deleted from the cache memory in accordance with the management list, and not to input the first processing report to the processing report queue when the plurality of second processing reports are stored in the processing report queue.

Storage control apparatus, storage system and method of controlling a cache memory

A device includes: a cache memory configured to store a first list and a second list, and a processor. The first list includes one or more entries that include any one of data pieces in a storage device and information indicating a location of the data piece on the storage device, and the second list includes one or more entries that include information indicating a location of an already discarded data piece on the storage device, the already discarded data piece having been included in an entry that has been evicted from the first list. The processor counts a count number of entries including data pieces updated and being consecutive from an eviction target entry when updating data piece of an entry in the first list, and writes data of a target entry in the storage device and discards the data from the cache memory based on a certain rule.

Information processing device, method of controlling a cache memory, and storage medium

A control device for a storage apparatus including a first storage device, a second storage device, and a third storage device, the control device includes a memory, and a processor coupled to the memory and configured to store, in the third storage device, first parity data generated based on first data stored in the first storage device and second data stored in the second storage device, store, in the first storage device, third data as update data of the first data, execute reading the first data and the third data from the first storage device and reading the first parity data from the third storage device when garbage collection for the first storage device is performed, and execute generating second parity data based on the read first data, the read third data, and the read first parity data.

Control device for a storage apparatus, system, and method of controlling a storage apparatus

A data storage apparatus includes a storage device, a first processor storing first data at a first address region of the storage device in the first memory, the first data included in a first data writing request, and a second processor coupled to a second memory storing second data at a second address region of the storage device in the second memory, the second data included in a second data writing request, and transmit the second data at the second address region of the storage device to the first processor, wherein the first processor is configured to store a first reception number in the first memory, the first reception number indicating a reception order, store the second data at the second address region of the storage device in the first memory, store a second reception number in the first memory, the second reception number indicating a reception order.

Data storage apparatus, data control apparatus, and data control method

A storage device includes a memory device and a processor. The memory device is configured to store therein a plurality of data pieces. The processor is configured to determine overlapping degrees of the plurality of data pieces stored in the memory device. The processor is configured to determine, on basis of the determined overlapping degrees, an order in which a plurality of information pieces for identifying the respective data pieces are to be sent to another storage device.

Storage device and storage system

A storage apparatus includes: a first storage device that stores data; a proxy storage processor that records first data in the first storage device in a power-off state of a second storage device, while a writing destination of the first data is the second storage device, and moves the first data to the second storage device after the second power storage is powered on, while the first data is recorded in the first storage device; and a cache releaser that deletes the first data from a cache memory after the proxy storage processor stores the first data in the second storage device, while the first data is recorded in the first storage device, so that it is possible to efficiently use the cache memory.

Storage apparatus, cache control method, and computer-readable recording medium having cache control program recorded thereon

A distributed storage system includes a plurality of storage devices and an information processing devices including a storage unit that is accessed more preferentially than the plurality of storage devices, and a processor. The processor deletes the data that can be restored from the storage unit when data that belongs to data stored in a first storage device and which can be restored is stored in the storage unit. The processor writes data that belongs to the data stored in the first storage device and which will not be restored to the storage unit. The processor switches the first storage device to the power-off state after writing the data. The processor reads the data that has been stored in the storage unit and which will not be restored when a request to read the data that will not be restored is given.

Distributed storage system and 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 control method is used in an information processing system which has a plurality of computers. The control method includes receiving, by a first computer of the plurality of computers, an update request of data from a first client device, receiving, by a second computer of the plurality of computers, a read request of the data from a second client device. The control method also includes selecting, by the second computer, a computer as an query destination from the plurality of computers excluding the first computer and a third computer that is a terminal to receive the update request sent from the first computer, when the data is undergoing updating due to the update request; transmitting a verify request to inquire whether the data is undergoing updating, to the query destination; and transmitting the data to the second client device based on a reply from the query destination.

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Kawasaki, Japan

Jun Kato