JP2021144381A - Protocol converter, block storage device, protocol conversion method, program, and recording medium - Google Patents

Abstract

To provide a protocol converter that can realize low cost and high performance processing.SOLUTION: In a protocol converter 10 of the present invention, an access detection section 12 detects access using a protocol for file storage from an external server to an external block storage device through a communication section 11, a mapping section 13 maps one file for each logical disk in the external block storage device when detecting the access, a conversion section 14 converts the protocol of the access into a protocol for block storage on the basis of the mapping, and an output section 15 outputs the access where protocol is converted into the protocol for block storage to the external block storage device through the communication section 11.SELECTED DRAWING: Figure 1

Description

The present invention relates to a protocol conversion device, a block storage device, a protocol conversion method, a program, and a recording medium.

As digitization progresses, file storage devices such as NAS (Network-Attached Storage) are used to hold a huge amount of information (for example, Patent Document 1 and the like).

Japanese Unexamined Patent Publication No. 2010-225024

However, the file storage device has a large load (resource consumption) and processing time on the file system, and in order to obtain the same performance as the block storage device, equipment such as expensive hardware is required.

Therefore, an object of the present invention is to provide a protocol conversion device, a block storage device, a protocol conversion method, a program, and a recording medium capable of realizing low-cost and high-performance processing.

In order to achieve the above object, the protocol conversion device of the present invention is used.
Including communication unit, access detection unit, mapping unit, conversion unit, output unit,
The access detection unit detects access from the external server to the external block storage device using the protocol for file storage via the communication unit.
When the mapping unit detects the access, the mapping unit maps one file for each logical disk in the external block storage device.
Based on the mapping, the conversion unit converts the access protocol into a block storage protocol.
The output unit is a device that outputs the access converted into the protocol for the block storage to the external block storage device via the communication unit.

The block storage device of the present invention
Including the protocol converter of the present invention and a logical disk
The logical disk is generated by virtualizing at least one physical disk.
The access detection unit detects access from the external server to the logical disk from the external server using the protocol for file storage via the communication unit.
When the mapping unit detects the access, the mapping unit maps one file for each logical disk.
The output unit is a device that outputs the access converted into the protocol for the block storage to the logical disk.

The protocol conversion method of the present invention
Including access detection process, mapping process, conversion process, output process,
In the access detection step, access from an external server to an external block storage device using a protocol for file storage is detected via a communication unit.
When the access is detected, the mapping step maps one file for each logical disk in the external block storage device.
The conversion step converts the access protocol into a block storage protocol based on the mapping.
The output step is a method of outputting the access converted into the protocol for the block storage to the external block storage device via the communication unit.

According to the present invention, for example, low-cost and high-performance processing can be realized.

FIG. 1 is a block diagram showing a configuration of an example of the device of the first embodiment. FIG. 2 is a block diagram showing an example of the hardware configuration of the apparatus of the first embodiment. FIG. 3 is a flowchart showing an example of processing in the apparatus of the first embodiment. FIG. 4 is a schematic diagram showing an example in which an external server accesses the block storage device via the device of the first embodiment. FIG. 5 is a schematic diagram showing an example of the mechanism of a general block storage device and a file storage device. FIG. 6 is a schematic view showing an example of processing of the mapping unit in the apparatus of the first embodiment. FIG. 7 is a block diagram showing a configuration of an example of the device of the second embodiment. FIG. 8 is a schematic view showing an example of a conventional block storage device and a file storage device.

In the protocol conversion device of the present invention, for example, the mapping unit may perform the mapping while determining the storage capacity of the file in accordance with the storage capacity of the one logical disk.

The protocol conversion device of the present invention further includes, for example, an error output unit.
The error output unit may output the processing as an error when the processing of the preset conditions is executed for the file based on the preset error conditions.

The protocol conversion device of the present invention further includes, for example, an access setting unit.
The access detection unit further detects access from another external server to the logical disk from the communication unit using the protocol for block storage via the communication unit.
The access setting unit may have an embodiment in which the protocol required for accessing the logical disk is set to at least one protocol for the block storage and the file storage according to the user's selection.

In the protocol conversion method of the present invention, for example, the mapping step may be an embodiment in which the mapping is performed while determining the storage capacity of the file in accordance with the storage capacity of the one logical disk.

The protocol conversion method of the present invention further includes, for example, an error output step.
The error output step may be in a mode of outputting the process as an error when the process of the preset condition is executed for the file based on the preset error condition.

The protocol conversion method of the present invention further includes, for example, an access setting step.
The access detection step further detects access from another external server to the logical disk using the protocol for block storage via the communication step.
The access setting step may be an embodiment in which the protocol required for accessing the logical disk is set to at least one protocol for the block storage and the file storage according to the user's selection.

The program of the present invention is a program for causing a computer to execute each step of the method of the present invention.

The recording medium of the present invention is a computer-readable recording medium on which the program of the present invention is recorded.

An embodiment of the present invention will be described with reference to the drawings. The present invention is not limited to the following embodiments. In each of the following figures, the same parts are designated by the same reference numerals. Further, the explanations of the respective embodiments can be referred to each other unless otherwise specified, and the configurations of the respective embodiments can be combined unless otherwise specified.

In the present invention, the "block storage device" refers to a storage in which a recording area is divided into units called logical disks, and the inside of the logical disks is further divided into units called fixed-length blocks for management.

[Embodiment 1]
FIG. 1 is a block diagram showing a configuration of an example of the protocol conversion device 10 of the present embodiment. As shown in FIG. 1, the apparatus 10 includes a communication unit 11, an access detection unit 12, a mapping unit 13, a conversion unit 14, and an output unit 15.

The device 10 may be, for example, one device including the above-mentioned parts, or a device in which the above-mentioned parts can be connected via a communication network. Further, the present device 10 can be connected to an external device described later via the communication network. The communication network is not particularly limited, and a known network can be used. For example, it may be wired or wireless. Examples of the communication network include an Internet line, WWW (World Wide Web), a telephone line, a LAN (Local Area Network), a SAN (Storage Area Network), and a DTN (Delay Tolerant Networking). Examples of wireless communication include WiFi (Wireless Fidelity), Bluetooth (registered trademark) and the like. The wireless communication may be either a form in which each device directly communicates (Ad Hoc communication) or an indirect communication via an access point. The apparatus 10 may be incorporated in the server as a system, for example. Further, the apparatus 10 may be, for example, a personal computer (PC, for example, a desktop type, a notebook type), a smartphone, a tablet terminal, or the like in which the program of the present invention is installed.

FIG. 2 illustrates a block diagram of the hardware configuration of the present device 10. The apparatus 10 includes, for example, a central processing unit (CPU, GPU, etc.) 101, a memory 102, a bus 103, a storage device 104, an input device 105, a display device 106, a communication device 107, and the like. Each part of the hardware configuration of the present apparatus 10 is connected to each other via the bus 103 by each interface (I / F).

The central processing unit (central processing unit) 101 is responsible for overall control of the apparatus 10. In the present device 10, for example, the program of the present invention and other programs are executed by the central processing unit 101, and various information is read and written. Specifically, for example, the central processing unit 101 functions as an access detection unit 12, a mapping unit 13, a conversion unit 14, and an output unit 15.

The bus 103 can also be connected to, for example, an external device. Examples of the external device include an external database, a printer, a storage device, and the like. The device 10 can be connected to the communication network by, for example, a communication device 107 connected to the bus 103, and can also be connected to an external device via the communication network. Specifically, for example, the communication device 107 functions as the communication unit 11.

Examples of the memory 102 include a main memory (main storage device). When the central processing unit 101 performs processing, for example, the memory 102 reads various operation programs such as the program of the present invention stored in the storage device 104 described later, and the central processing unit 101 reads from the memory 102. Receive the data and run the program. The main memory is, for example, a RAM (random access memory). Further, the memory 102 may be, for example, a ROM (read-only memory).

The storage device 104 is also referred to as a so-called auxiliary storage device with respect to the main memory (main storage device), for example. As described above, the storage device 104 stores an operation program including the program of the present invention. The storage device 104 may be, for example, a combination of a recording medium and a drive for reading and writing to the recording medium. The recording medium is not particularly limited, and may be an internal type or an external type, and examples thereof include HD (hard disk), CD-ROM, CD-R, CD-RW, MO, DVD, flash memory, and memory card. Be done. The storage device 104 may be, for example, a hard disk drive (HDD) in which a recording medium and a drive are integrated, and a solid state drive (SSD).

In the present device 10, the memory 102 and the storage device 104 can also store access information and log information from the administrator, and information acquired from an external database (not shown).

The device 10 further includes, for example, an input device 105 and a display device 106. The input device 105 is, for example, a touch panel, a keyboard, a mouse, or the like. Examples of the display device 106 include an LED display and a liquid crystal display.

Next, an example of the protocol conversion method of the present embodiment will be described with reference to the flowchart of FIG. The protocol conversion method of the present embodiment is carried out as follows, for example, by using the protocol conversion device 10 of FIG. The protocol conversion method of the present embodiment is not limited to the use of the protocol conversion device 10 of FIG.

First, the access detection unit 12 detects the access from the external server to the external block storage device via the communication unit 11 using the protocol for file storage (S1). FIG. 4 is a schematic diagram showing an example in which an external server accesses the block storage device via the device 10. As shown in FIG. 4, the external server 40a using the file storage protocol accesses the external block storage device 60 via the present device 10. The number of external servers 40a may be one or two or more, for example. When there are a plurality of external servers 40a, the plurality of external servers 40a may access the logical disk 61 (block) in the external block storage device 60 at the same time, for example, via the present device 10. Further, another external server 40b that accesses the external block storage device 60 using the protocol for block storage may simultaneously access the external block storage device 60. In this case, exclusive control is executed by, for example, external servers 40a and 40b. As shown in the figure, the other external server 40b may access the external block storage device 60 without going through the device 10, but may access the external block storage device 60 via the device 10. May be good. The case where another external server 40b accesses the external block storage device 60 via the present device 10 will be described later. The external block storage device 60 is not particularly limited, and is, for example, block storage in which at least one or more physical disks 63 are virtualized. When there are a plurality of physical disks 63, for example, as shown in the figure, the plurality of physical disks 63 are also referred to as a physical disk group 62.

Here, the mechanism of a general block storage device and a file storage device will be described with reference to FIG. As shown in FIG. 5A, the block storage device identifies data by, for example, the logical disk and the block number, and performs reading / writing and the like. On the other hand, the file storage device divides the recording area into units of a logical disk and a block, as in the case of the block storage, for example. However, as shown in FIG. 5B, the file storage device identifies the data as a "file" by the file system with the directory from the root and the path name including the file name, and reads / writes the data. conduct.

Next, when the mapping unit 13 detects the access, one file is mapped for each block of the logical disk 61 in the external block storage device 60 (S2). For example, as shown in FIG. 6, the mapping unit 13 may perform the mapping while determining the storage capacity of the file corresponding to the storage capacity of the one logical disk. Specifically, for example, as shown in FIG. 6, if the storage capacity of the block 1 is 30 GB (gigabyte), the storage capacity of the file 1 mapped by the mapping unit 13 is also determined to be 30 GB. The storage capacity may be different for each block as shown. Further, the storage capacity of the file may be as long as the determined storage capacity can be secured, and for example, the file may be truncated. When the truncation is performed, for example, the external server can add data up to the determined storage capacity. Specifically, an example of truncation of the file will be described. The logical disk A (storage capacity: 10 GB) and the logical disk B (storage capacity: 10 GB) are recognized by the external server as file A (storage capacity: 10 GB) and file B (storage capacity: 10 GB) by the present device 10. Suppose you are. In this case, in order to copy the contents (data) of the logical disk A to the logical disk B, it is necessary to overwrite the file A with the file B by, for example, the OS (operating system) of the external server. However, as described above, since the file B already exists on the OS of the external server, the storage capacity of the file B is temporarily truncated to 0 (that is, the existing 10 GB of data is discarded. ), Add 10GB of the contents (data) of the file A to the file B to make the file B 10GB. In this way, in order to duplicate a logical disk by a file copy operation, truncation and addition to the original size are performed.

For example, as shown in FIG. 6, the present device 10 may cause the external server to recognize the free space in the storage capacity of the file as “0” at normal times. On the other hand, when the truncation is performed, that amount may be recognized as free space.

Next, the conversion unit 14 converts the access protocol into a block storage protocol based on the mapping (S3).

Then, the output unit 15 outputs the access converted into the protocol for the block storage to the external block storage (S4) via the communication unit 11 and terminates (END). As a result, the external server can access the data stored in the external block storage using the converted block storage protocol, for example, via the present device 10.

The apparatus 10 may further include, for example, an error output unit. The error output unit may output the process as an error when, for example, a process of preset conditions is executed for the file after the step (S4). The conditions are not particularly limited and can be set arbitrarily. Specifically, for example, there are processes such as adding, adding, deleting files, and changing attribute information. The attribute information refers to, for example, a file name, a time stamp, an access permission, and the like. When the condition is the addition or addition of a file, for example, when the external server is made to recognize the free space in the storage capacity of the file as "0" as described above, the apparatus 10 will perform the device 10. When the addition or addition process is executed for the file having the free space "0", the process is output to the external server as an error. As a result, the external server cannot perform processing such as addition or addition to the file. On the other hand, the condition may be set so that, for example, when the above-mentioned truncation is performed, the external server may perform processing such as addition or addition to the mapped file. good. The error may be output as, for example, a file system error or a permission error.

For example, as described above, the present device 10 may be accessed from another external server 40b that uses the protocol for block storage in addition to the external server 40a that uses the protocol for file storage. In this case, the apparatus 10 may further include, for example, an access setting unit. In this case, the access detection unit 12 further detects the access from the other external server 40b to the logical disk 61 via the communication unit 11 using the protocol for block storage. Then, the access setting unit sets the protocol required for accessing the logical disk 61 to at least one protocol for the block storage and the file storage according to the user's selection. The device 10 can respond to the user's selection, for example, via the input device 105. Further, the apparatus 10 can respond to the user's selection by acquiring information indicating the protocol selected by the user via, for example, the communication device 107. As a result, even if a plurality of servers having different protocols access the logical disk 61 at the same time, the plurality of servers can access the data stored in the logical disk 61.

According to the protocol conversion device 10 of the present embodiment, low-cost and high-performance processing can be realized.

FIG. 8 is a schematic view showing a storage device of the prior art. In the prior art A, the access detection unit in the file storage device 50a detects access from an external server 40a using a protocol for file storage. In the prior art, data (file) having a size exceeding the storage capacity of the one logical disk is recorded across a plurality of logical disks. Therefore, as shown in the prior art A of FIG. 8, the load (resource consumption) and the processing time on the file system in the file storage device 50a have increased. However, according to the present device 10, since the mapping unit 13 can make the relationship between the logical disk and the file one-to-one, the processing can be performed in a shorter time than in the prior art. Further, according to the present device 10, since the external server 40a can use a block storage device whose processing is simpler than that of a file storage device using a file system, resource consumption is low and high-performance processing is possible. become.

More specifically, the present device 10 will be described. It is assumed that the block storage device includes, for example, the drives shown below.
a-HDD: storage capacity 10 GB, sector size (= block size) 512 bytes b-HDD: storage capacity 10 GB, sector size (= block size) 512 bytes c-SSD: storage capacity 20 GB, sector size (= block size) 4096 Byte d-SSD: Storage capacity 20 GB, sector size (= block size) 4096 bytes

Next, the block storage device configures the RAID shown below from the above drive.
RAID: Storage capacity 10GB, RAID1, a-HDD and b-HDD, block size 512 bytes RAIDcd: Storage capacity 40GB, RAID0, c-SSD and d-SSD, block size 512 bytes (depending on the software) Adjust the difference in block size)

The logical disk shown below is cut out from the above RAID.
Logical disk x: Storage capacity 1GB, derived from RAIDab Logical disk y: Storage capacity 2GB, derived from RAIDcd

Then, the present device 10 converts the above two logical disks. As a result, the external server 40a recognizes the above two logical disks as follows.
/ (Route)
└x (1GB)
└y (2GB)
Free space 0

On the other hand, in the conventional storage device (file storage device such as NAS), the inside of the logical disk is formatted to create a file system, and 1 GB and 2 GB files are created in the file system. Since these two files are not recorded in the continuous area, area management is required. In addition, since it is also necessary to manage file paths and attributes, the storage device of the prior art requires more processing than the device 10, and the processing capacity is reduced.

[Embodiment 2]
FIG. 7 is a block diagram showing a configuration of an example of the block storage device 20 of the present embodiment. As shown in FIG. 7, the apparatus 20 includes the protocol conversion apparatus 10 described in the first embodiment and the logical disk 21.

The device 20 may be, for example, one device including a protocol conversion device 10 and a logical disk 21, or devices that can be connected to each other via the communication network. Further, the present device 20 can be connected to an external device (for example, an external server, an external database, a printer, etc.) via the communication network. The apparatus 20 may be incorporated in the server as a system, for example. Further, the apparatus 20 is, for example, a personal computer (PC, for example, a desktop type, a notebook type), a smartphone, or a tablet in which a program for causing a computer to execute each step of the protocol conversion method described in the first embodiment is installed. It may be a terminal or the like.

The protocol conversion device 10 and the logical disk 21 are connected to each other via a bus, for example, by an interface (I / F). Similarly, the logical disk 21 and the physical disk 31 are connected to each other via, for example, the bus. For the bus, for example, the description of the bus 103 in the first embodiment can be incorporated.

The access detection unit 12, the mapping unit 13, the conversion unit 14, and the output unit 15 in the protocol conversion device 10 are realized by, for example, a central processing unit. As the central processing unit, for example, the description of the central processing unit 101 in the first embodiment can be referred to. The communication unit 11 in the protocol conversion device 10 is realized by, for example, a communication device. As the communication device, for example, the description of the communication device 107 in the first embodiment can be incorporated.

The logical disk 21 is generated by virtualizing at least one or more physical disks 31. When there are a plurality of physical disks 31, for example, as shown in FIG. 7, the plurality of physical disks 31 are also referred to as a physical disk group 30. The physical disk 31 is realized by, for example, an SSD, an HDD, or the like. The number of the physical disk group 30 may be one or two or more. Similarly, the number of logical disks 21 may be one or two or more. The logical disk 21 can be realized by, for example, RAID (Redundant Arrays of Inexpensive Disks) technology or the like.

Next, the processing in the protocol conversion device 10 will be described, but unless otherwise specified, the protocol conversion method described in the first embodiment and the description in FIG. 3 can be incorporated.

The access detection unit 12 detects an access from the external server 40a to the logical disk 21 using the file storage protocol via the communication unit 11.

When the mapping unit 13 detects the access, the mapping unit 13 maps one file for each logical disk 21.

Similar to the first embodiment, the conversion unit 14 converts the access protocol into a block storage protocol based on the mapping.

The output unit 15 outputs the access converted into the protocol for the block storage to the logical disk 21. As a result, the external server 40a can access the data stored in the logical disk 21 using the converted block storage protocol, for example, via the protocol conversion device 10.

FIG. 8 is a schematic view showing a storage device of the prior art. In the prior art B, the access detection unit in the block storage device 50b detects access from an external server 40b that uses a protocol for block storage. In the prior art, a plurality of blocks (storage areas) in the logical disk are allocated to the external server 40b. Therefore, the external server 40b consumes the same resources as connecting the plurality of physical disks to the external server 40b. Further, the logical disk often has a multipath configuration such as 2 passes or 4 passes. Therefore, the external server 40b recognizes that there are far more physical disks (for example, 2 times, 4 times, etc.) than the actual number of physical disks. As a result, in the prior art, the load (resource consumption) and the processing time on the external server 40b have increased. However, according to the present device 20, since the mapping unit 13 can make the relationship between the logical disk and the file one-to-one, resource consumption can be suppressed as compared with the conventional technique, and processing can be performed in a short time.

[Embodiment 3]
The program of this embodiment is a program for causing a computer to execute each step of the method of each of the above-described embodiments as a procedure. In the present invention, "procedure" may be read as "processing". Further, the program of the present embodiment may be recorded on a computer-readable recording medium, for example. The recording medium is not particularly limited, and examples thereof include HD (hard disk), CD-ROM, CD-R, CD-RW, MO, DVD, flash memory, and memory card.

Although the present invention has been described above with reference to the embodiments, the present invention is not limited to the above embodiments. Various changes that can be understood by those skilled in the art can be made to the structure and details of the present invention within the scope of the present invention.

<Additional notes>
Some or all of the above embodiments may be described as, but not limited to, the following appendices.
(Appendix 1)
Including communication unit, access detection unit, mapping unit, conversion unit, output unit,
The access detection unit detects access from the external server to the external block storage device using the protocol for file storage via the communication unit.
When the mapping unit detects the access, the mapping unit maps one file for each logical disk in the external block storage device.
Based on the mapping, the conversion unit converts the access protocol into a block storage protocol.
The output unit is a protocol conversion device that outputs the access converted into the protocol for the block storage to the external block storage device via the communication unit.
(Appendix 2)
The protocol conversion device according to Appendix 1, wherein the mapping unit performs the mapping while determining the storage capacity of the file corresponding to the storage capacity of the one logical disk.
(Appendix 3)
In addition, it includes an error output section.
The protocol conversion device according to Appendix 1 or 2, wherein the error output unit outputs the process as an error when the process of the preset condition is executed for the file based on the preset error condition. ..
(Appendix 4)
In addition, including the access setting section,
The access detection unit further detects access from another external server to the logical disk from the communication unit using the protocol for block storage via the communication unit.
The access setting unit sets the protocol required for accessing the logical disk to at least one protocol for the block storage and the file storage according to the user's selection, according to any one of Appendix 1 to 3. The protocol converter described.
(Appendix 5)
Including the protocol conversion device according to any one of Appendix 1 to 4 and a logical disk.
The logical disk is generated by virtualizing at least one physical disk.
The access detection unit detects access from the external server to the logical disk from the external server using the protocol for file storage via the communication unit.
When the mapping unit detects the access, the mapping unit maps one file for each logical disk.
The output unit outputs the access converted into the protocol for the block storage to the logical disk.
Block storage device.
(Appendix 6)
Including access detection process, mapping process, conversion process, output process,
In the access detection step, access from an external server to an external block storage device using a protocol for file storage is detected via a communication unit.
When the access is detected, the mapping step maps one file for each logical disk in the external block storage device.
The conversion step converts the access protocol into a block storage protocol based on the mapping.
The output step is a protocol conversion method in which the access converted into the protocol for the block storage is output to the external block storage device via the communication unit.
(Appendix 7)
The protocol conversion method according to Appendix 6, wherein the mapping step performs the mapping while determining the storage capacity of the file corresponding to the storage capacity of the one logical disk.
(Appendix 8)
In addition, it includes an error output process
The protocol conversion method according to Appendix 6 or 7, wherein the error output step outputs the process as an error when the process of the preset condition is executed for the file based on the preset error condition. ..
(Appendix 9)
In addition, it includes an access setting process
The access detection step further detects access from another external server to the logical disk via the communication unit using a protocol for block storage.
The access setting step is set to any one of Supplementary notes 6 to 8 in which the protocol required for accessing the logical disk is set to at least one protocol for the block storage and the file storage according to the user's selection. Described protocol conversion method.
(Appendix 10)
A program for causing a computer to execute each step of the method according to any one of Appendix 6 to 9.
(Appendix 11)
A computer-readable recording medium on which the program described in Appendix 10 is recorded.

According to the present invention, for example, low-cost and high-performance processing can be realized. Therefore, the present invention is particularly useful when dealing with a large number of block devices, for example.

10 Protocol conversion device 11 Communication unit 12 Access detection unit 13 Mapping unit 14 Conversion unit 15 Output unit 101 Central processing unit 102 Memory 103 Bus 104 Storage device 105 Input device 106 Display device 107 Communication device

Claims (10)

Including communication unit, access detection unit, mapping unit, conversion unit, output unit,
The access detection unit detects access from the external server to the external block storage device using the protocol for file storage via the communication unit.
When the mapping unit detects the access, the mapping unit maps one file for each logical disk in the external block storage device.
Based on the mapping, the conversion unit converts the access protocol into a block storage protocol.
The output unit is a protocol conversion device that outputs the access converted into the protocol for the block storage to the external block storage device via the communication unit. The protocol conversion device according to claim 1, wherein the mapping unit performs the mapping while determining the storage capacity of the file corresponding to the storage capacity of the one logical disk. In addition, it includes an error output section.
The protocol conversion according to claim 1 or 2, wherein the error output unit outputs the process as an error when the process of the preset condition is executed for the file based on the preset error condition. Device. In addition, including the access setting section,
The access detection unit further detects access from another external server to the logical disk from the communication unit using the protocol for block storage via the communication unit.
Any one of claims 1 to 3, wherein the access setting unit sets the protocol required for accessing the logical disk to at least one protocol for the block storage and the file storage according to the user's selection. The protocol conversion device according to one item. The protocol conversion device according to any one of claims 1 to 4 and a logical disk are included.
The logical disk is generated by virtualizing at least one physical disk.
The access detection unit detects access from the external server to the logical disk from the external server using the protocol for file storage via the communication unit.
When the mapping unit detects the access, the mapping unit maps one file for each logical disk.
The output unit outputs the access converted into the protocol for the block storage to the logical disk.
Block storage device. Including access detection process, mapping process, conversion process, output process,
In the access detection step, access from an external server to an external block storage device using a protocol for file storage is detected via a communication unit.
When the access is detected, the mapping step maps one file for each logical disk in the external block storage device.
The conversion step converts the access protocol into a block storage protocol based on the mapping.
The output step is a protocol conversion method in which the access converted into the protocol for the block storage is output to the external block storage device via the communication unit. The protocol conversion method according to claim 6, wherein the mapping step performs the mapping while determining the storage capacity of the file corresponding to the storage capacity of the one logical disk. In addition, it includes an error output process
The protocol conversion according to claim 6 or 7, wherein the error output step outputs the process as an error when the process of the preset condition is executed for the file based on the preset error condition. Method. In addition, it includes an access setting process
The access detection step further detects access from another external server to the logical disk via the communication unit using a protocol for block storage.
The access setting step is any one of claims 6 to 8, wherein the protocol required for accessing the logical disk is set to at least one protocol for the block storage and the file storage according to the user's selection. The protocol conversion method according to one item. A program for causing a computer to execute each step of the method according to any one of claims 6 to 9.

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