JP2010238042A - Apparatus, program, system and method for processing of information - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information processing apparatus or the like, capable of reducing retransmission/rereception of accumulation data or operation delay caused by instability of a WAN (Wide Area Network) in a view from a server device side without adding a special configuration as hardware. <P>SOLUTION: A storage arrangement controller C connected with the server device SV via a LAN (Local Area Network), and connected with a storage device ST1 via the WAN includes an iSCSI (internet Small Computer System Interface) protocol control unit 22 integrating a plurality of commands to be transmitted to the storage device ST1 from the server device SV to generate one integration command, transmitting it to the storage device ST1, transmitting and receiving data corresponding to each command integrated inside the transmitted integration command to/from the storage device ST1 in a lump in each command, dividing the data transmitted and received to/from the storage device ST1 in a lump in each piece of the data corresponding to each command, and transmitting and receiving the data to/from the server device SV via the LAN. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention belongs to the technical fields of an information processing apparatus, an information processing program, an information processing system, and an information processing method. More specifically, an information processing device connected to a server device and one or a plurality of information storage devices, a program for the information processing device, an information processing method executed in the information processing device, and the information processing device It belongs to the technical field of information processing systems.

  Conventionally, as an environment for performing data transmission / reception between a server device composed of a personal computer or the like and a so-called storage device including a large-capacity storage device such as a hard disk, for example, SAN (FC (Fiber Channel) protocol) (Storage Area Network) environment. However, in recent years, many storage devices compatible with iSCSI (Internet Small Computer System Interface) that can be used with TCP / IP (Transmission Control Protocol / Internet Protocol) lines have been shipped, and existing storage devices that connect the server device and the storage device. By executing the iSCSI protocol on the TCP / IP network, data can be transmitted and received between the server device and the storage device.

  On the other hand, when data is transmitted / received by executing the iSCSI protocol on the TCP / IP network described above, the following problems can be considered.

    (1) When data is transmitted / received between the server apparatus and the storage apparatus using the iSCSI protocol via a WAN (Wide Area Network) such as the Internet, the storage apparatus is recognized and data is transmitted / received (more specifically, A delay occurs in the transmission / reception of iSCSI commands and iSCSI data), and the load on the server device side due to the exchange increases.

    (2) When a line disconnection due to a timeout during data transmission / reception or data re-transmission due to the quality of the WAN line occurs, the load on the server side is generated / increased, thereby causing data destruction on the storage side Can occur. In particular, in the Internet environment, data can be transmitted and received at a lower price than other network services. In particular, when sequential data is continuously transmitted and received, so-called “retransmission” may occur. In such a case, it is necessary to re-acquire data from the storage device again, which further increases the delay. .

    (3) When connecting one server device and N storage devices in a remote location with “1: N”, this is due to the limitation of the capacity of each physical volume or the specific location of the remote location. It is necessary to process each constraint while constantly confirming each constraint with the server device.

  Here, as conventional techniques considering the above-mentioned problems, there are those disclosed in Patent Documents 1 and 2 below.

  First, in Patent Document 1 below, by incorporating an iSCSI accelerator into an iSCSI storage system, the CPU load on the host side in the TCP (IP security) process, which is the TCP / IP protocol process based on the iSCSI protocol and its encryption process, is described. It is disclosed that mitigation, high speed data input / output, and data protection are possible.

  On the other hand, in Patent Document 2 below, a cache system is arranged between a server device and a storage device in the transmission / reception of data using the iSCSI protocol. It is disclosed that data transmission / reception can be speeded up by deleting existing data.

JP 2007-264744 A (for example, paragraph numbers [0011] to [0015]) JP 2008-016037 A (for example, paragraph numbers [0023] to [0027] and paragraph numbers [0035] and [0036])

  However, in any of the techniques disclosed in each of the above-mentioned patent documents, basically, a so-called hardware configuration specialized for each purpose is separately provided to speed up data transmission / reception. For this reason, in the techniques disclosed in the respective patent documents, it is necessary to prepare a hardware configuration having a special configuration for the purpose, and there is a problem in that the cost and the installation space are increased. .

  Therefore, the present invention has been made in view of the above-mentioned problems, and the problem is that the operation delay due to the instability of the WAN and the re-transmission / reception of stored data as seen from the server device side are specially implemented as hardware. PROBLEM TO BE SOLVED: To provide an information processing device that can be reduced without adding an additional configuration, a program for the information processing device, an information processing method executed in the information processing device, and an information processing system including the information processing device It is in.

  In order to solve the above-mentioned problem, the invention described in claim 1 is connected to a server device via a local area network and has one or more storage devices or the like via a wide area communication network such as a network. In an information processing device connected to an information storage device, an iSCSI protocol control unit or the like that generates a single integrated command by integrating a plurality of commands to be transmitted from the server device to any one of the information storage devices A generating unit; a transmitting unit such as a LAN port for transmitting the generated integrated command to the one information storage device via the wide area communication network; and the commands integrated in the transmitted integrated command. Transmission / reception of storage data corresponding to each of the commands is performed together with the one information storage device via the wide area communication network. The stored data transmitted and received between the wide area communication control means such as a SCSI protocol control unit and the one information storage device is divided into the stored data corresponding to the commands, and the local area network. And local area communication control means such as an iSCSI protocol control unit for transmitting and receiving to / from the server device via the network.

  Therefore, an integrated command that integrates a plurality of commands to be transmitted to one information storage device is generated and transmitted to the one information storage device, and stored data corresponding to each command integrated in the integrated command Are sent to and received from a single information storage device via a wide-area communication network, and further transmitted to and received from the server device for each stored data corresponding to each command. By reducing the number of communications with the connected information storage device, a special hardware configuration can be used to reduce operation delays and re-transmission / reception of stored data due to instability of the wide area network seen from the server device side. It can be reduced without adding.

  In order to solve the above problem, the invention according to claim 2 is the information processing apparatus according to claim 1, wherein the generation unit corresponds to a processing unit when the command is processed in the server apparatus. One integrated command for an information amount larger than the unit information amount is generated, and the wide area communication control means sets the accumulated data corresponding to each of the commands so that the information amount is larger than the unit information amount. In this way, each command is collected and transmitted to and received from the one information storage device.

  Therefore, one integrated command for an information amount larger than the unit information amount corresponding to the processing unit is generated, and further, the accumulated data corresponding to each command is set so that the information amount is larger than the unit information amount and Since each command is collectively sent to and received from one information storage device, by increasing the amount of information sent as commands and stored data at a time, information between the information storage devices connected by a wide area network The number of communications can be reduced.

  In order to solve the above-described problem, the invention according to claim 3 is the information processing apparatus according to claim 1 or 2, wherein the plurality of commands integrated into one integrated command is the one information. In the storage device, each command corresponding to the stored data stored in a continuous area is configured.

  Therefore, since the plurality of commands integrated into one integrated command are the respective commands corresponding to the stored data stored in continuous areas in one information storage apparatus, It is possible to reduce operation delay and re-transmission / reception of stored data due to instability of the wide area network viewed from the apparatus side without adding a special configuration as hardware.

  In order to solve the above-described problem, the invention described in claim 4 is the information processing apparatus according to any one of claims 1 to 3, wherein the storage is stored in the one information storage apparatus. When the data is read in the server device, the generation unit generates a single integrated command by integrating a plurality of read commands to be transmitted from the server device to the one information storage device. The communication control means obtains accumulated data corresponding to each of the read commands integrated in the transmitted integrated command from the one information storage device via the wide area communication network, collectively for each of the read commands. In addition, the local area communication control means uses the stored data acquired from the one information storage device to store the stored data corresponding to each read command. Configured to send to the server device via the local area network separately for each.

  Therefore, when the storage data stored in one information storage device is read by the server device, a plurality of read commands to be transmitted from the server device to the one information storage device are integrated into one integrated command. The stored data corresponding to each read command generated and integrated in the integrated command is collected for each read command from one information storage device, and the stored data acquired from one information storage device is read for each read command. Since each stored data corresponding to each command is transmitted to the server device, when the stored data is read from the information storage device, operation delays or stored data caused by instability of the wide area network viewed from the server device side Retransmission / reception can be reduced without adding a special hardware configuration.

  In order to solve the above problem, the invention according to claim 5 is the information processing apparatus according to any one of claims 1 to 3, wherein the storage data is transferred from the server device to the one information storage device. The generation means integrates a plurality of write commands to be transmitted from the server device to the one information storage device to generate one integrated command, and the local area A communication control unit configured to store the storage data to be stored in the one information storage device via the local area network for each storage data corresponding to each of the write commands integrated into the integration command; Further, the wide area data communication control means acquires each of the acquired stored data from each of the write frames integrated in the transmitted integrated command. Wherein said one information storage device are summarized in de respectively only the corresponding amount configured to transmit via a wide area network.

  Therefore, when storing accumulated data from a server device to one information storage device, a plurality of write commands to be transmitted from the server device to one information storage device are integrated to generate one integrated command, The storage data to be stored in one information storage device is acquired from the server device for each storage data corresponding to each write command integrated in the integration command, and each acquired storage data is included in the integration command. Since the data corresponding to each of the integrated write commands is collected and transmitted to one information storage device, the instability of the wide area network seen from the server device side when writing stored data to the information storage device The resulting operational delay and re-transmission / reception of stored data can be reduced without adding a special hardware configuration.

  In order to solve the above problem, an invention according to claim 6 is the information processing apparatus according to any one of claims 1 to 5, wherein the information processing apparatus is connected to the server apparatus via the local area network. It further includes cache means such as a cache memory for temporarily storing the stored data to be transmitted and received.

  Therefore, since it further includes a cache means for temporarily storing the accumulated data transmitted / received to / from the server apparatus, even when the accumulated data is retransmitted due to the quality of the wide area communication network, the server apparatus Accumulated data necessary for processing can be transmitted and received at high speed.

  In order to solve the above-described problem, an invention according to a seventh aspect causes a computer to function as the information processing apparatus according to any one of the first to sixth aspects.

  Therefore, by executing the information processing program on a computer, an integrated command that integrates a plurality of commands to be transmitted to one information storage device is generated and transmitted to the one information storage device. Data stored and received corresponding to each command integrated in the command is sent and received together via a wide area network with one information storage device, and each command is supported with the server device. Since the computer functions to transmit / receive each stored data to be transmitted, the instability of the wide area network seen from the server apparatus side can be reduced by reducing the number of times of communication with the information storage apparatus connected by the wide area network. The resulting operational delay and re-transmission / reception of stored data can be reduced without adding a special hardware configuration.

  In order to solve the above problem, an invention according to an eighth aspect includes the information processing apparatus according to any one of the first to sixth aspects, the information storage apparatus, and the server apparatus.

  Therefore, in the information processing device, an integrated command that integrates a plurality of commands to be transmitted to one information storage device is generated and transmitted to the one information storage device, and each command integrated in the integrated command Since each corresponding stored data is transmitted / received for each command together via a wide area communication network and further transmitted / received to / from the server device for each stored data corresponding to each command. By reducing the number of communications with information storage devices connected by a wide area communication network, it is possible to reduce the number of communication delays caused by instability of the wide area network seen from the server side and retransmit / receive stored data as hardware. This can be reduced without adding a special configuration.

  In order to solve the above problems, the invention according to claim 9 is connected to a server apparatus via a local area network, and also includes one or a plurality of storage apparatuses via a wide area communication network such as a network. An information processing method executed in an information processing device connected to an information storage device, wherein a plurality of commands to be transmitted from the server device to any one of the information storage devices is integrated into one integrated command A generation step of generating the integrated command, a transmission step of transmitting the generated integrated command to the one information storage device via the wide area communication network, and each command integrated in the transmitted integrated command. Wide-area data communication control for performing transmission / reception of the corresponding stored data for each command together with the one information storage device via the wide-area communication network. The stored data collectively transmitted and received between the process and the one information storage device is divided into the stored data corresponding to the commands, and the server device is connected to the server device via the local area network. And a local area communication control process for transmitting and receiving data.

  Therefore, an integrated command that integrates a plurality of commands to be transmitted to one information storage device is generated and transmitted to the one information storage device, and stored data corresponding to each command integrated in the integrated command Are sent to and received from a single information storage device via a wide-area communication network, and further transmitted to and received from the server device for each stored data corresponding to each command. By reducing the number of communications with the connected information storage device, a special hardware configuration can be used to reduce operation delays and re-transmission / reception of stored data due to instability of the wide area network seen from the server device side. It can be reduced without adding.

  According to the present invention, an integrated command obtained by integrating a plurality of commands to be transmitted to one information storage device is generated and transmitted to the one information storage device, and each command integrated in the integrated command is assigned to each command. Corresponding accumulated data is sent and received for each command together with one information storage device via a wide area network, and further with each server for each accumulated data corresponding to each command, By reducing the number of communications with the information storage device connected via the wide area communication network, operation delays due to the instability of the wide area network seen from the server side and the re-transmission / reception of stored data as hardware It can be reduced without adding a special configuration.

1 is a block diagram illustrating a schematic configuration of an information processing system according to an embodiment, (a) is a block diagram illustrating an overall configuration of the information processing system, and (b) is a schematic configuration of a storage arrangement control device according to the embodiment. FIG. It is a figure explaining the data read-out operation concerning an embodiment. It is a figure explaining the data write operation which concerns on embodiment.

  Next, a mode for carrying out the present invention will be described with reference to FIGS. In the embodiment described below, a server device composed of a personal computer or the like, one or a plurality of storage devices, and the server device are connected via a LAN (Local Area Network), and the storage device is a WAN. This is an embodiment in the case where the present invention is applied to an information processing system including a storage arrangement control device connected in conformity with the TCP / IP protocol via the network.

FIG. 1 is a block diagram illustrating a schematic configuration of the information processing system according to the embodiment. FIG. 2 is a diagram illustrating a data read operation in the information processing system. FIG. It is a figure explaining write-in operation.
(I) Configuration of Information Processing System First, the overall configuration of the information processing system according to the embodiment will be described with reference to FIG.

  As shown in FIG. 1A, the overall configuration of the information processing system S according to the embodiment is basically different from the server device SV having the same configuration as the conventional one, and the server device SV. The storage apparatus ST1 to ST3 set in place and basically provided with the same configuration as the conventional one, and the storage arrangement control apparatus C according to the embodiment are configured. In this configuration, the server apparatus SV and the storage arrangement control apparatus C are connected to each other by a LAN that is a TCP / IP line capable of transmitting and receiving data using the iSCSI protocol. The storage apparatuses ST1 to ST3 and the storage arrangement control apparatus C are connected to each other by a network NT which is a WAN as a TCP / IP line capable of transmitting and receiving data using the iSCSI protocol.

  At this time, each of the storage devices ST1 to ST3 includes a LAN port P that performs an input / output control operation for connection to the network NT, and disks DK1 to DK3 made of a non-volatile recording medium such as a hard disk, for example. ing. The data stored in the disks DK1 to DK3 can be transmitted / received to / from the server apparatus SV via the network NT and the storage arrangement control apparatus C.

  On the other hand, the storage arrangement control apparatus C includes a cache memory 10 as an example of a cache unit, a cache disk 11, a cache control unit 20, a virtual volume control unit 21, an example of a generation unit, and an example of a wide area communication control unit. As an example of the local area communication control means, the iSCSI protocol control unit 22, the storage address management table 30, and the storage devices ST1 to ST3 respectively correspond to the storage devices ST1 to ST3 via the network NT. LAN ports P2 to P4 as an example of transmission means for performing input / output control operations for data transmission / reception, and LAN ports for performing input / output control operations for data transmission / reception via the LAN between the server apparatus SV P1.

  In this configuration, the cache memory 10 is a memory that temporarily stores data that is frequently transmitted to and received from the server apparatus SV, and the cache disk 11 has a function as a save area of the cache memory 10. Yes. Then, the cache control unit 20 performs cache control of data transmission / reception with respect to the cache memory 10.

  Next, the virtual volume control unit 21 is as if the disks DK1 to DK3 (so-called volumes) provided in the respective storage devices ST1 to ST3 are connected on a single LAN as viewed from the server device SV. To operate virtually. At this time, the virtual volume control unit 21 stores the storage contents in the storage address management table 30 storing the addresses (IP addresses) of the disks DK1 to DK3 included in the storage devices ST1 to ST3 as the iSCSI protocol. Works with reference.

  Further, the iSCSI protocol control unit 22 refers to the storage contents in the storage address management table 30 and transmits / receives data according to the embodiment described later (more specifically, any one of the storage devices ST1 to ST3). Data reading and writing) are collectively controlled.

Next, the operation of the storage arrangement control apparatus C according to the embodiment will be described in more detail with reference to FIGS.
(II) Embodiment of Read Operation First, the data read operation as the operation will be described with reference to FIG. 2 by taking the read operation specifically for the storage device ST1 as an example. Note that the operation illustrated in FIG. 2 is performed by reading three blocks of data DA to DC that are continuously stored in the storage device ST1 in response to a read command from the server device SV. This is an operation to output to the device SV.

  As illustrated in FIG. 2, the read operation according to the embodiment includes a read command RC-A for requesting reading of the data DA and a read request for reading of the data DB from the server device SV. A command RC-B and a read command RC-C requesting reading of the data DC are transmitted to the storage arrangement control device C in time series.

  Thereby, the iSCSI protocol control unit 22 of the storage arrangement control apparatus C collects (in other words, bundles) these three read commands RC-A to RC-C and generates an integrated read command RC-ABC. At this time, the integrated read command RC-ABC is a command for continuously reading data DA, data DB, and data DC.

  Note that the iSCSI protocol control unit 22 determines whether the data DA, data DB, and data DC are data blocks stored in a continuous area of the disk DK. 30. If the contents are stored in a continuous area, the data DA, the data DB, and the data DC are grouped together by further referring to the storage address management table 30. An address on the new disk DK and a data area to be requested are calculated and reset (re-description) on the frame of the iSCSI protocol read command.

  Further, the data amount of the request unit of data read in the integrated read command RC-ABC is set as a data amount larger than the data amount of the request unit in the read command RC-A from the server device SV in the iSCSI protocol control unit 22. It can be set arbitrarily. More specifically, for example, when the data amount of the request unit in the read commands RC-A to RC-C from the server device SV is 32 kilobytes, the data amount in the read request unit as the integrated read command RC-ABC For example, 512 kilobytes.

  Thereafter, the iSCSI protocol control unit 22 transmits the integrated read command RC-ABC to the storage device ST1 that is the destination via the network NT.

  Thereby, for example, when the data DA to DC are continuously stored in the disk DK1 included in the storage device ST1, the storage device ST1 reads them and further continuously stores them as data D-ABC. The data is collected and transmitted to the storage arrangement control apparatus C.

  Thereafter, the iSCSI protocol control unit 22 of the storage arrangement control apparatus C refers to the storage address management table 30 while receiving the data D-ABC, and the data DA to DC included in the data D-ABC. Is received for each of the data DA to DC.

  Thereby, when it is first confirmed that the reception of the data DA has been completed, the iSCSI protocol control unit 22 stores the received data DA in 32 corresponding to the request unit in the read command RC-A. The data is divided into kilobyte reading units and sequentially transmitted to the server apparatus SV via the LAN. Thereafter, when the reception signal ACK indicating that the reception is completed is received from the server apparatus SV that has completed the reception of the data DA, the iSCSI protocol control unit 22 returns an iSCSI response Res in response thereto.

  Next, when it is confirmed that the reception of the data DB following the data DA is completed, the iSCSI protocol control unit 22 corresponds to the request unit in the read command RC-B and receives the received data. The D-B is divided into 32-kilobyte read units, and sequentially transmitted to the server apparatus SV via the LAN. Thereafter, when the reception signal ACK indicating the completion of the reception is received from the server device SV that has completely received the data DB, the iSCSI protocol control unit 22 returns an iSCSI response Res in response thereto.

  Further, when it is confirmed that the reception of the data DC following the data DB is completed, the iSCSI protocol control unit 22 corresponds to the request unit in the read command RC-C and receives the received data D -C is divided into read units of 32 kilobytes, and sequentially transmitted to the server apparatus SV via the LAN. Thereafter, when the reception signal ACK indicating the completion of the reception is received from the server apparatus SV that has completely received the data D-C, the iSCSI protocol control unit 22 returns an iSCSI response Res in response thereto.

When the reception of the data D-ABC is completed, the iSCSI protocol control unit 22 transmits a reception signal ACK indicating that the reception is complete to the storage device ST1, and then the iSCSI response Res corresponding to the reception signal ACK. Is received from the storage apparatus ST1, and the read operation as the storage arrangement control apparatus C according to the embodiment is terminated.
(III) Embodiment of Write Operation Next, with respect to the data write operation as the operation of the storage arrangement control apparatus C according to the embodiment, the write operation specifically targeting the storage apparatus ST1 will be described with reference to FIG. It explains using. The operation illustrated in FIG. 3 reads three blocks of data DA to DC stored in the server apparatus SV in response to a write command from the server apparatus SV, and stores them in the storage. This is an operation of writing (storing) in a continuous area in the device ST1.

  As illustrated in FIG. 3, as a write operation according to the embodiment, first, a write command WC-A for requesting writing of the data DA to the storage device ST1 from the server device SV is a storage arrangement control device. Sent to C.

  As a result, when the iSCSI protocol control unit 22 of the storage arrangement control device C receives the write command WC-A, it prepares to receive the corresponding data DA and completes the preparation for reception indicating that the reception preparation is completed. The signal R2T is returned to the server device SV.

  Next, the server device SV that has received the reception preparation completion signal R2T divides the write data DA related to the write command WC-A into, for example, 32 kilobytes and transmits it to the storage arrangement control device C. To do. As a result, the iSCSI protocol control unit 22 sequentially receives the data DA, and when all the data DA is received, returns an iSCSI response Res indicating that the reception is complete to the server SV. Thereafter, the cache control unit 20 temporarily stores the received write command WC-A and the corresponding data DA in the cache memory 10 or the cache disk 11.

  Next, when a write command WC-B requesting writing of the data DB to the storage device ST1 is transmitted from the server device SV to the storage arrangement control device C, the iSCSI protocol control unit 22 that has received this command , Preparation for reception of the corresponding data DB is performed, and a reception preparation completion signal R2T indicating that the reception preparation is completed is returned to the server SV.

  Receiving the reception preparation completion signal R2T, the server apparatus SV divides the write data DB related to the write command WC-B, for example, every 32 kilobytes, and transmits it to the storage arrangement control apparatus C. Thereby, the iSCSI protocol control unit 22 sequentially receives the data DB, and when all of the data DB is received, returns an iSCSI response Res indicating that the reception is completed to the server device SV. Thereafter, the cache control unit 20 temporarily stores the received write command WC-B and the corresponding data DB in the cache memory 10 or the cache disk 11.

  Further, when a write command WC-C for requesting writing of the data D-C to the storage device ST1 is transmitted from the server device SV to the storage arrangement control device C, the iSCSI protocol control unit 22 that has received this command, The corresponding data D-C is prepared for reception, and a reception preparation completion signal R2T indicating that the preparation for reception is completed is returned to the server SV.

  Receiving the reception preparation completion signal R2T, the server apparatus SV divides the write data D-C related to the write command WC-C into, for example, every 32 kilobytes and transmits it to the storage arrangement control apparatus C. Accordingly, the iSCSI protocol control unit 22 sequentially receives the data D-C, and when all of the data D-C are received, returns an iSCSI response Res indicating that the reception is completed to the server device SV. Thereafter, the cache control unit 20 temporarily stores the received write command WC-C and the corresponding data DC in the cache memory 10 or the cache disk 11.

  If the data DA to DC to be written to the storage device ST1 and the write commands WC-A to WC-C corresponding to the data DA to DC are stored in the cache memory 10 or the cache disk 11 by the above operation, then the iSCSI protocol is used. The control unit 22 collects (in other words, bundles) the three write commands WC-A to WC-C and generates an integrated write command WC-ABC. At this time, the integrated write command WC-ABC is a command for successively writing the data DA, data DB, and data DC into the storage device ST1.

  Note that the iSCSI protocol control unit 22 confirms the contents of the storage address management table 30 for the continuous write destinations of the data DA, data DB, and data DC, and puts them in a continuous group of areas. The address on the new disk DK (any one of the disks DK1 to DK3 in the storage device ST1) and the data area to be requested are calculated so as to be written and reset on the frame of the integrated write command WC-ABC ( Re-describe).

  Further, the data amount of the request unit for data writing in the integrated write command WC-ABC is the same as that in the integrated read command RC-ABC, in the iSCSI protocol control unit 22, the write command WC from the server device SV. It can be arbitrarily set as a data amount larger than the data amount of the request unit in -A or the like. More specifically, for example, if the data amount of the request unit in the write commands WC-A to WC-C from the server apparatus SV is 32 kilobytes, the read request unit as the integrated write command WC-ABC The data amount is assumed to be 512 kilobytes, for example.

  Thereafter, the iSCSI protocol control unit 22 transmits the integrated write command WC-ABC to the destination storage apparatus ST1 via the network NT. Thereafter, when the reception preparation completion signal R2T corresponding to the integrated write command WC-ABC is received from the storage device ST1, the iSCSI protocol control unit 22 next receives the data DA that is the target of the integrated write command WC-ABC. To D-C are read from the cache memory 10 or the cache disk 11 and are continuously collected as data D-ABC, which is then transmitted to the storage device ST1 and stored at the corresponding address.

  Thereafter, the iSCSI response Res corresponding to the transmitted data D-ABC is received from the storage apparatus ST1, and the writing operation as the storage arrangement control apparatus C according to the embodiment is ended.

  As described above, according to the operation of the storage arrangement control apparatus C according to the embodiment, for example, read commands RC-A to RC-C or write commands WC-A to WC to be transmitted to one storage apparatus ST1. An integrated read command RC-ABC or an integrated write command WC-ABC, each of which integrates WC-C according to the iSCSI protocol, is generated and transmitted to the one storage device ST1, and the integrated read command RC-ABC or The transmission and reception of data corresponding to the read commands RC-A to RC-C or the write commands WC-A to WC-C integrated in the integrated write command WC-ABC are performed for each command in accordance with the iSCSI protocol. Collectively with one storage device ST1, via network NT, and with server device SV Is transmitted / received for each data corresponding to each command, and therefore, by reducing the number of communications with the storage devices ST1 to ST3 connected by the network NT, it is caused by the instability of the network NT as seen from the server device SV side. Therefore, the operation delay and the re-transmission / reception of stored data can be reduced without adding a special hardware configuration.

  Further, one integrated read command RC-ABC or one integrated write command WC-ABC for a data amount larger than the data amount of the processing unit in the server device SV is generated, and further, the read commands RC-A to RC are generated. -C or data corresponding to each of the write commands WC-A to WC-C is transferred to each storage device ST1 so that the amount of data is larger than the data amount of the processing unit and for each command. Since data is transmitted and received, increasing the amount of data as commands and data transmitted and received at a time can reduce the number of communications with the storage apparatuses ST1 to ST3 connected via the network NT, and at a high speed. Can send and receive.

  Further, a plurality of read commands RC-A to RC-C or write commands WC-A to WC-C integrated into one integrated read command RC-ABC or one integrated write command WC-ABC are Since each of the commands corresponds to data stored in a continuous area in the storage device ST1, processing delays due to the instability of the network NT as viewed from the server device SV side and data Retransmission / reception can be reduced without adding a special hardware configuration.

  Furthermore, since the cache memory 10 or the like that temporarily stores data transmitted to and received from the server apparatus SV is further provided, the server apparatus can be used even when data retransmission due to the quality of the network NT occurs. Data necessary for processing in the SV can be transmitted and received at high speed.

  Further, since the storage arrangement control device C includes the virtual volume control unit 21, it is possible to make each storage device ST1 to ST3 appear to be in the same volume on the same LAN when viewed from the server device SV.

  2 and 3 are recorded on a recording medium such as a flexible disk or a hard disk, or acquired via a network such as the Internet, and this is stored in a microcomputer or the like. The microcomputer can be used as the iSCSI protocol control unit 22 according to the embodiment by reading and executing the above.

  As described above, the present invention can be used in the field of the information processing system S. In particular, a server device and one or a plurality of storage devices are connected to each other via a network NT such as a WAN. If the present invention is applied to the field of information processing systems connected in accordance with the / IP protocol, a particularly remarkable effect can be obtained.

DESCRIPTION OF SYMBOLS 10 Cache memory 11 Cache disk 20 Cache control part 21 Virtual volume control part 22 iSCSI protocol control part 30 Storage address management table S Information processing system C Storage arrangement control apparatus SV Server apparatus ST1, ST2, ST3 Storage apparatus NT network P, P1, P2, P3, P4 LAN ports DK1, DK2, DK3 Disks DA, DB, DC, D-ABC Data RC-A, RC-B, RC-C Read command WC-A, WC-B, WC-C Write command RC-ABC Integrated read command WC-ABC Integrated write command ACK Receipt signal Res iSCSI response R2T Reception preparation completion signal

Claims (9)

In an information processing apparatus connected to a server apparatus via a local area network and connected to one or a plurality of information storage apparatuses via a wide area communication network,
Generating means for generating a single integrated command by integrating a plurality of commands to be transmitted from the server device to any one of the information storage devices;
Transmitting means for transmitting the generated integrated command to the one information storage device via the wide area communication network;
Wide-area communication for performing transmission / reception of stored data corresponding to each of the commands integrated in the transmitted integrated command together with the one information storage device via the wide-area communication network. Control means;
The stored data transmitted / received together with the one information storage device is transmitted / received to / from the server device via the local area network by dividing the stored data corresponding to each of the commands. Local area communication control means;
An information processing apparatus comprising: The information processing apparatus according to claim 1,
The generation unit generates one integrated command that targets an information amount larger than a unit information amount corresponding to a processing unit when the command is processed in the server device,
The wide area communication control means transmits / receives the accumulated data corresponding to each command to / from the one information accumulating device so that the information amount is larger than the unit information amount and for each command. An information processing apparatus characterized by that. The information processing apparatus according to claim 1 or 2,
An information processing apparatus, wherein the plurality of commands integrated into one integrated command are the commands corresponding to the stored data stored in continuous areas in the one information storage apparatus. The information processing apparatus according to any one of claims 1 to 3,
When the server device reads out the stored data stored in the one information storage device,
The generation unit generates a single integrated command by integrating a plurality of read commands to be transmitted from the server device to the one information storage device,
The wide area data communication control means collects the stored data corresponding to each of the read commands integrated in the transmitted integrated command for each of the read commands from the one information storage device to the wide area network. And get through
Further, the local area communication control means transmits the stored data acquired from the one information storage device to the server device via the local area network by dividing the stored data for each read command corresponding to each read command. An information processing apparatus characterized by: The information processing apparatus according to any one of claims 1 to 3,
When the storage data is transmitted from the server device to the one information storage device and stored,
The generation unit generates one integrated command by integrating a plurality of write commands to be transmitted from the server device to the one information storage device,
The local area communication control means sends the accumulated data to be accumulated in the one information accumulation device via the local area network for each accumulated data corresponding to each of the write commands integrated into the integrated command. Obtained from the server device,
Further, the wide area data communication control means collects the acquired accumulated data in an amount corresponding to each of the write commands integrated in the transmitted integrated command and stores the acquired wide area data in the one information storage apparatus. An information processing apparatus for transmitting via a communication network. In the information processing apparatus according to any one of claims 1 to 5,
An information processing apparatus, further comprising: a cache unit that temporarily stores the accumulated data transmitted to and received from the server apparatus via the local area network.   An information processing program for causing a computer to function as the information processing apparatus according to any one of claims 1 to 6. The information processing apparatus according to any one of claims 1 to 6,
The information storage device;
The server device;
An information processing system comprising: An information processing method executed in an information processing apparatus connected to a server device via a local area network and connected to one or a plurality of information storage devices via a wide area communication network,
A generating step of generating a single integrated command by integrating a plurality of commands to be transmitted from the server device to any one of the information storage devices;
A transmission step of transmitting the generated integrated command to the one information storage device via the wide area network;
Wide area data for performing transmission / reception of stored data corresponding to each of the commands integrated in the transmitted integrated command together with the one information storage device through the wide area communication network. A communication control process;
The stored data transmitted / received collectively to / from the one information storage device is transmitted / received to / from the server device via the local area network separately for each stored data corresponding to each command. Local area communication control process;
An information processing method comprising:

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