KR101560724B1 - System and method for accessing to file storage - Google Patents

Abstract

A file storage access system and method are disclosed. A file storage access system stores a gateway that accesses at least one other kind of file storage in response to a file access request and a global namespace mapped to the file storage, And a metadata server that provides information.

File storage, virtualization, gateways, metadata, and global namespace

Description

[0001] SYSTEM AND METHOD FOR ACCESSING TO FILE STORAGE [0002]

The present invention relates to a file storage access system and method, and more particularly, to a file storage access system and method that provides an integrated interface for accessing file storage belonging to various file systems.

With the development of Internet technology, the storage capacity of file storage used for Internet services is rapidly increasing every year. As a result, capacity expansion of file storage has become a necessity every year. Therefore, it is very important to manage file storage reasonably.

At this time, because the characteristics (size, file operation type, etc.) of the file to be stored are different for each service, the file is stored in the file storage suitable for the characteristic corresponding to the service. Depending on the type of file storage, the interfaces that provide file operations to services may differ. Accordingly, in order to provide the Internet service, it is necessary to know the information of the file storage where the file is stored so that the file can be accessed by using the corresponding interface. In addition, since different types of file storage are applied to each service, the file access interface is limited depending on the type of file storage in terms of developing the Internet service.

Also, it is difficult to know the file storage of each of a large number of files for a service, and managing such a file storage may cause a very heavy load in terms of operating an Internet service.

Therefore, there is a need for a way to access the various file storages integrally.

The present invention provides a file storage access system and method for providing an integrated interface capable of accessing various types of file storage.

The present invention provides a file storage access system and method capable of accessing file storage in which files are stored by referring to file storage and a mapped global namespace.

The present invention provides a file storage access system and method capable of accessing a file storage even if the user knows only the path name of the file without knowing the information of the file storage in which the file to be accessed is stored.

The present invention provides a file storage access system and method capable of accessing file storage by referring to a global namespace without modifying an application even if the file storage is physically changed.

A file storage access system according to an embodiment of the present invention stores a gateway for accessing at least one other kind of file storage in response to a file access request and a global name space mapped to the file storage, And a metadata server that provides file access information according to the metadata request of the metadata server.

The gateway according to an embodiment of the present invention includes an access request receiving unit for receiving a file access request for a file stored in at least one other kind of file storage, a metadata request including a path name of the file to the metadata server And a file access unit for receiving the file access information of the file from the metadata server referencing the global name space and accessing the file storage where the file is stored.

A metadata server according to an embodiment of the present invention includes a metadata request receiver for receiving a metadata request including a path name of a file from a gateway, a metadata request receiver for receiving a metadata request including a path name of the file, And a file access information providing unit for providing file access information on the file to the gateway through a global name space referencing unit referencing a namespace and a result referring to the global name space.

A method of accessing a file storage according to an embodiment of the present invention includes receiving a file access request for a file stored in at least one other kind of file storage, transmitting a metadata request including a path name of the file to a metadata server Receiving the file access information of the file from the metadata server, and accessing the file storage in which the file is stored with reference to the file access information.

According to the present invention, a file storage access system and method are provided for providing an integrated interface capable of accessing various kinds of file storage.

According to the present invention, a file storage access system and method are provided in which file storage can be accessed by referring to file storage and a mapped global namespace.

According to the present invention, there is provided a file storage access system and method capable of accessing a file storage even if the user does not know the information of the file storage in which the file to be accessed is stored and only knows the path name of the file.

According to the present invention, there is provided a file storage access system and method capable of accessing file storage by referring to a global namespace without modifying an application even if the file storage is physically changed.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to or limited by the embodiments. Like reference symbols in the drawings denote like elements. The file storage access method may be performed by a component that constitutes a file storage access system.

1 is a diagram showing the overall configuration of a file storage access system according to an embodiment of the present invention.

1, a file storage access system may include a gateway 101, an application 102, a metadata server 103, and file storage 104-1 through 104-N.

The file storage access system according to an exemplary embodiment of the present invention can provide an integrated interface for connecting to various types of file systems. The file storage access system may forward a file access request to the gateway 101 for a file that the user wishes to process via the application 102. The gateway 101 then obtains file access information on the file storage in which the file is stored from the metadata server 103 and then accesses the file storage 104-1 to 104-N in which the file is stored via the network have. At this time, the file storages 104-1 to 104-N can be operated by different kinds of file systems. That is, the file storage access system can perform a virtualization function of integrating the different kinds of file storage 104-1 to 104-N into one. File storage access systems can access file storage through a unified interface regardless of the type of physical file storage.

At this time, the metadata server 103 may store a global name space mapped with the file storages 104-1 to 104-N. The global namespace may imply that the name of the file storage and service, which is the storage space of the file for each service, is mapped. The global namespace is described in detail in FIG.

The gateway 101 and the metadata server 103 may be configured in a clustering structure composed of a plurality of servers to support high performance and high availability. At this time, a plurality of servers constituting the gateway 101 and the metadata server 103 may be designed to operate statelessly.

FIG. 2 illustrates an example of a global namespace to which file storage is mapped according to an embodiment of the present invention. Referring to FIG.

Referring to FIG. 2, the global name space may be a hierarchical tree structure. Here, each node may mean a service. For example, if B is a portal service with a "portal service", b1 may be a mail service of "mail", b2 may be a community service of a community, and b3 may be a search service of "search".

At this time, the global namespace may be mapped to the file storage and the service name, which is the physical storage space of the file for each service. Even if file storage, which is actually physical storage space, is changed, the path name of the file is not changed, so the file can be easily accessed. And the node mapped to file storage can be the lowest node in the tree structure of the global namespace. If a file x is used in the search service, x can be stored in file storage z.

The user can send a file access request for file x to the gateway 101 via the application 102. [ The gateway 101 may then send a metadata request, including the file path name, to the metadata server 103. At this time, the file path name can also include the service name to which the file belongs.

then. The metadata server 103 can refer to the stored global name space after confirming the service to which the file x belongs. The metadata server 103 can confirm the file storage mapped to the service and provide the gateway 101 with the file access information capable of accessing the confirmed file storage in response to the metadata request. At this time, the file access information may include a file system type of the file storage in which the file is stored, a network address of the file storage, or a local path name of the file.

Then, the gateway 101 can access the file storage where the file requested by the user is stored through the file access information. That is, even if the user does not know what kind of file system the file system belongs to, the user can access the file if he knows only the path name of the file.

3 is a view for explaining the detailed operation of the file storage access system according to an embodiment of the present invention.

Referring to FIG. 3, a process of accessing various types of file storage 104 through the gateway 101 is shown.

When the user desires to access the file, the user can transmit a file access request to the gateway 101 through the application 102. [ A file access request can include the pathname of the file you want to access. If the file name to be accessed is "/ foo / bar", the file path name can mean "X / service / community / foo / bar". At this time, the user may have already obtained the path name of the file (pathname).

"/ Foo / bar" still has the path name "X / service / community / foo / bar", even if the file system type of the file storage 104 mapped to the community service is changed.

The gateway 101 may send a metadata request to the metadata server 103 via the file path name included in the file access request. The metadata server 103 may store and maintain the global namespace. As already mentioned above, the global namespace may refer to a tree structure in which the file storage 104, which is the storage space of a file for each service, is mapped with the name of the service. That is, the global namespace may include a plurality of nodes mapped with the file storage 104 storing the files of the corresponding service.

The metadata server 103 may refer to the global namespace through the path name of the file in response to the metadata request. The metadata server 103 can confirm the access information to the file storage 104 mapped to the service through the name of the service included in the path name of the file. Then, the metadata server 103 may return the file access information for the file requested by the user to the gateway 101 in response to the metadata request.

At this time, the file access information may include the file system type of the file storage 104 in which the file is stored, the network address of the file storage 104, or the local path name of the file. The gateway 101 can access the file storage 104 storing the file requested by the user using the file access information. The gateway 101 may perform a file input / output function for connecting to at least one other kind of file storage 104. [

At this time, if the metadata server 103 requests the file for x, then the gateway 101 stores the mapping information of the file storage for the file x in the cache data . ≪ / RTI > For the sake of consistency of the mapping information, the gateway 101 may periodically update the mapping information through the metadata server 103.

4 is a block diagram illustrating a detailed configuration of a gateway according to an embodiment of the present invention.

4, the gateway 101 may include an access request receiving unit 401, a metadata request unit 402, a file access unit 403, and a mapping information storage unit 404.

The access request receiving unit 401 may receive a file access request for a file stored in at least one other kind of file storage. There is no limit to the type of file storage. At this time, the access request receiving unit 401 can receive the file access request from the application through the RPC (remote procedure call) protocol.

The file access request may include the path name of the file stored in the file storage. The pathname of the file can include the name of the service where the file is used. Then, the metadata server 103 can refer to the global name space using the name of the service included in the path name of the file.

The metadata request unit 402 may transmit a metadata request including a path name of a file to the metadata server.

The file access unit 403 can receive the file access information for the file from the metadata server 103 that refers to the global namespace and access the file storage where the file is stored. In this case, the global name space may be a structure in which the file storage, which is the storage space of the file for each service, and the service name are mapped.

The metadata server 103 can confirm the file storage mapped to the global namespace using the path name of the file included in the file access request. That is, the metadata server 103 can refer to the global name space and provide the file access unit 403 with file access information, which is information of file storage for the file. In one example, the file access information may include a file system type of the file storage in which the file is stored, a network address of the file storage, or a local path name of the file.

At this time, the file system type of the file storage may indicate the type of the file system to which the file storage belongs. The network address of the file storage may be an IP address of the file storage. Also, the local path name of the file may refer to the directory name where the file is stored in the file storage.

The file access unit 403 can access the file storage through the file input / output function of the gateway 101. [ At this time, the file access unit 403 can access the file stored in the file storage through the file input / output function irrespective of the type of the file storage.

The mapping information storage unit 404 may store mapping information on the global name space and file storage as cache data for the file requested to be accessed. Transmitting a metadata request to the metadata server 103 every time a file is requested may cause a performance degradation in terms of the gateway.

Accordingly, for the file once referred to by the metadata server by the file access request, the mapping information storage unit 404 can store the mapping information between the service to which the file belongs and the file storage as cache data. In order to maintain the consistency of the mapping information, the mapping information storage unit 404 may update the mapping information by querying the metadata server 103 every preset period. Since the mapping information for the global namespace and physical file storage is not changed frequently, the update period can be adjusted according to the system configuration.

5 is a block diagram illustrating a detailed configuration of a metadata server according to an embodiment of the present invention.

5, the metadata server 103 may include a metadata request receiving unit 501, a global name space reference unit 502, and a file access information providing unit 503.

The metadata request receiving unit 501 may receive a metadata request including a path name of a file from the gateway 101. [ At this time, the path name of the file may include the name of the service in which the file is used. The name of the service can be used to identify the file storage mapped to the global namespace.

The global namespace reference unit 502 may refer to the global namespace mapped with the file storage where the file is stored based on the path name of the file. In this case, the global name space may be a structure in which file storage, which is the storage space of the file for each service, is mapped with the name of the service. In the global namespace, a plurality of nodes matched with a service name may be configured in a tree form. The last node in the global namespace can be mapped to file storage.

If the path name of the file x is received via the metadata request, the global name space reference unit 502 refers to the global name space through the service y included in the path name to store the file storage mapped in the global name space Can be confirmed.

The file access information providing unit 503 can provide the file access information for the file to the gateway 101 through the result of referring to the global name space. The file access information may include the file system type of the file storage where the file is stored, the network address of the file storage, or the local path name of the file.

Then, the gateway 101 receives the file access request, and receives the file access information according to the file access request from the metadata server 103 to access at least one other kind of file storage.

6 is a flowchart illustrating a file storage access method according to an embodiment of the present invention.

Referring to FIG. 6, a process of accessing file storage through a gateway will be described.

In step S601, the gateway can receive a file access request for a file stored in at least one other kind of file storage. At this time, the file access request may include a path name for the file.

In step S602, the gateway may send a metadata request to the metadata server, including the path name of the file. At this time, the metadata server can provide the file access information of the file by referring to the file name and the global name space mapped through the path name of the file.

The global namespace may be a structure in which the names of the file storage and services, which are the storage space of the files for each of the services, are mapped.

In step S603, the gateway can receive the file access information of the file from the metadata server.

At this time, the file access information may include the file system type of the file storage where the file is stored, the network address of the file storage, or the local path name of the file.

In step S604, the gateway can access the file storage in which the file is stored by referring to the file access information. At this time, the gateway can access the file storage by using the file input / output function. There is no limit to the number and type of file storage, and the gateway can provide a common interface to access various types of file storage.

In step S605, the gateway may store mapping information for the global namespace and file storage as cache data for the file requested to be accessed. At this time, the gateway can update the mapping information by querying the metadata server every preset period.

FIG. 7 illustrates a process of accessing file storage according to an embodiment of the present invention.

In step S701, the metadata server 103 may store and maintain the global namespace. In this case, the global name space may refer to a structure in which a file storage, which is a file storage space for each service, and a name of the service are mapped.

In step S702, the user can send a file access request to the gateway 101 via the application 102. [ At this time, the file access request may include the path name of the file. Here, the path name of the file can be composed of the name of the service in which the file is used.

In step S703, the gateway 101 may transmit a metadata request including the path name of the file to the metadata server 703 in response to receiving the file access request.

Then, in step S704, the metadata server 103 may refer to the global name space. That is, the metadata server 103 can confirm the information of the file storage mapped to the global name space through the name of the service to which the file requested by the user belongs. In step S705, the metadata server 103 may provide the file access information to the gateway 101. [ The file access information may include the file system type of the file storage where the file is stored, the network address of the file storage, or the local path name of the file.

Then, in step S706, the gateway 101 may store the mapping information on the file once confirmed through the metadata server 103 as cache data. Then, the gateway 101 may update the mapping information at a predetermined period to maintain consistency of the mapping information.

In step S707, the gateway 101 can access the file storage 104 through the file access information received from the metadata server 103. [

6 and Fig. 7 can be referred to the description of Figs. 1 to 5. Fig.

The file storage access method according to an embodiment of the present invention also includes a computer readable medium including program instructions for performing various computer implemented operations. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The media may be program instructions that are specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Modification is possible. Accordingly, the spirit of the present invention should be understood only in accordance with the following claims, and all equivalents or equivalent variations thereof are included in the scope of the present invention.

1 is a diagram showing the overall configuration of a file storage access system according to an embodiment of the present invention.

FIG. 2 illustrates an example of a global namespace to which file storage is mapped according to an embodiment of the present invention. Referring to FIG.

3 is a view for explaining the detailed operation of the file storage access system according to an embodiment of the present invention.

4 is a block diagram illustrating a detailed configuration of a gateway according to an embodiment of the present invention.

5 is a block diagram illustrating a detailed configuration of a metadata server according to an embodiment of the present invention.

6 is a flowchart illustrating a file storage access method according to an embodiment of the present invention.

FIG. 7 illustrates a process of accessing file storage according to an embodiment of the present invention.

Description of the Related Art

101: Gateway

102: Application

103: Metadata server

104-1 ~ 104 ~ N: file storage

Claims (24)

A gateway for accessing different types of file storage in response to a file access request; And A metadata server for storing the global name space mapped with the file storage and providing file access information according to the metadata request of the gateway, Lt; / RTI > The file access request includes: A path name of a file stored in the file storage, The file access information includes: A file system type of the file storage in which the file is stored, a network address of the file storage, and a local path name of the file, The gateway comprises: Accessing a file stored in a space indicated by a local path name of the file in file storage corresponding to a network address of the file storage among the different types of file storage according to the file system type, The gateway comprises: A plurality of file storage systems connected through a network and operated by different file systems to perform a virtualization function to consolidate a plurality of file storages into a single file storage system, Access, The global name space may include: The name of the service is mapped to the file storage which is the storage space of the file for each service, The file storage access system comprising: delete delete The method according to claim 1, The metadata server includes: When receiving a metadata request including a path name of a file from the gateway, provides the file access information on the file storage in which the file is stored by referring to the global name space. delete The method according to claim 1, The gateway comprises: And the mapping information for the global name space and the file storage is stored as cache data for the file requested to access the file. The method according to claim 6, The gateway comprises: And the mapping information updating unit updates the mapping information by querying the metadata server every preset period. An access request receiving unit for receiving a file access request for a file stored in file storage of different types; A metadata request unit for transmitting a metadata request including a path name of the file to a metadata server; And A file access unit for receiving file access information of the file from a metadata server referencing a global namespace and accessing file storage where the file is stored; Lt; / RTI > The file access request includes: A path name of a file stored in the file storage, The file access information includes: A file system type of the file storage in which the file is stored, a network address of the file storage, and a local path name of the file, The file access unit, Accessing a file stored in a space indicated by a local path name of the file in file storage corresponding to a network address of the file storage among the different types of file storage according to the file system type, A plurality of file storage systems connected through a network and operated by different file systems to perform a virtualization function to consolidate a plurality of file storages into a single file storage system, Access, The metadata server includes: Storing the file storage, which is the file storage space for each service, and the global namespace to which the service name is mapped Lt; / RTI > delete 9. The method of claim 8, The metadata server includes: Refers to the global name space through a path name of the file, and returns file access information of the file storage mapped to the global name space in response to the metadata request. delete 9. The method of claim 8, A mapping information storage unit for storing, as cache data, the mapping information for the global name space and the file storage for the file requested to access the file, Lt; / RTI > 13. The method of claim 12, The mapping information storage unit stores, And the mapping server updates the mapping information by querying the metadata server every preset period. A metadata request receiving unit receiving a metadata request including a path name of a file from a gateway; A global name space referencing unit for referring to a global name space mapped with file storage where the file is stored based on a path name of the file; And A file access information providing unit for providing file access information on the file to the gateway through a result of referring to the global name space, Lt; / RTI > The file access information includes: A file system type of the file storage in which the file is stored, a network address of the file storage, and a local path name of the file, The gateway comprises: Accessing a file stored in a space indicated by a local path name of the file in file storage corresponding to a network address of the file storage among file storage of different kinds according to the file system type, And provides a unified interface by performing a virtualization function of consolidating a plurality of file storages operated by different file systems into a single unit, and accessing a file stored in each of the plurality of file storages through the unified interface and, The file access request includes: A path name of a file stored in the file storage, The global name space may include: The file storage, which is the file storage space for each service, is mapped to the name of the service The metadata server comprising: delete delete 15. The method of claim 14, The gateway comprises: And stores mapping information for the global name space and the file storage as cache data with respect to the file requested to access the file. 15. The method of claim 14, The gateway comprises: Wherein the metadata server updates the mapping information by querying the metadata server every preset period. Receiving a file access request for a file stored in different types of file storage; Transmitting a metadata request including a path name of the file to a metadata server; Receiving file access information of the file from the metadata server; And Accessing the file storage where the file is stored with reference to the file access information Lt; / RTI > The file access request includes: A path name of a file stored in the file storage, The file access information includes: A file system type of the file storage in which the file is stored, a network address of the file storage, and a local path name of the file, Wherein accessing the file storage comprises: Accessing a file stored in a space indicated by a local path name of the file in file storage corresponding to a network address of the file storage among the different types of file storage according to the file system type, A plurality of file storage systems connected through a network and operated by different file systems to perform a virtualization function to consolidate a plurality of file storages into a single file storage system, Access, The metadata server includes: Storing the file storage, which is the file storage space for each service, and the global namespace to which the service name is mapped The file storage access method comprising: 20. The method of claim 19, The metadata server includes: Wherein the file access information of the file is provided by referring to the global name space mapped to the file storage through the path name of the file. delete delete 20. The method of claim 19, Storing mapping information for the global name space and the file storage for the file requested to be accessed as cache data Wherein the file storage access method further comprises: A computer-readable recording medium having recorded thereon a program for executing the method according to any one of claims 19 to 20 and 23.

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