技术领域technical field
本发明涉及数据存储技术领域，更具体地说，涉及一种多客户端元数据同步更新方法，还涉及一种多客户端元数据同步更新系统。The present invention relates to the technical field of data storage, and more specifically, relates to a multi-client metadata synchronous update method, and also relates to a multi-client metadata synchronous update system.
背景技术Background technique
当前的大规模存储系统中，往往通过客户端访问存储服务器上的文件系统，客户端对一个文件的首次访问会从元数据服务器(MDS，保存所有文件的属性信息)获取文件的元数据信息，保存到客户端的本地cache中，对该文件的后续访问直接使用本地cache中的元数据。In the current large-scale storage system, the file system on the storage server is often accessed through the client. The first access to a file by the client will obtain the metadata information of the file from the metadata server (MDS, which stores the attribute information of all files). Save to the client's local cache, and subsequent access to the file directly uses the metadata in the local cache.
对于单一客户端的应用场景，在客户端上修改文件的访问权限时，会向MDS发起修改请求，MDS修改成功后反馈至客户端，客户端再修改自己本地缓存的权限信息。修改之后，下一次客户端对文件系统中的文件进行访问时，只需要检查客户端本地缓存的权限信息即可。For the application scenario of a single client, when modifying the access permission of a file on the client, a modification request will be sent to the MDS. After the modification is successful, the MDS will feed back to the client, and the client will modify the permission information in its local cache. After modification, the next time the client accesses files in the file system, it only needs to check the permission information locally cached by the client.
然而，对于多客户端的应用场景，每个客户端拥有各自独立的元数据缓存，在其中一个客户端上修改某个文件的访问权限时，只有MDS和发起修改请求的客户端上的元数据会更新，其它客户端访问同一个文件时，依旧会使用各自本地缓存的旧的元数据来判断访问权限，导致访问出错。However, for multi-client application scenarios, each client has its own independent metadata cache. When modifying the access permission of a file on one of the clients, only the metadata on the MDS and the client that initiated the modification request will be saved. Update, when other clients access the same file, they will still use their local cached old metadata to determine access permissions, resulting in access errors.
因此，如何使得多客户端同步更新本地缓存的元数据是本领域技术人员急需要解决的技术问题。Therefore, how to enable multiple clients to synchronously update locally cached metadata is a technical problem that those skilled in the art urgently need to solve.
发明内容Contents of the invention
为解决上述技术问题，本发明提供一种多客户端元数据同步更新方法，使得多客户端同步更新本地缓存的元数据。In order to solve the above technical problems, the present invention provides a multi-client metadata synchronous updating method, so that the multi-client synchronously updates locally cached metadata.
为实现上述目的，本发明提供如下技术方案：To achieve the above object, the present invention provides the following technical solutions:
一种多客户端元数据同步更新方法，包括：A multi-client metadata synchronous update method, comprising:
获取元数据服务器中的会话列表，所述会话列表为所述元数据服务器与多个客户端建立的连接列表；Obtain a session list in the metadata server, where the session list is a list of connections established between the metadata server and multiple clients;
发送文件属性修改请求至所述元数据服务器，根据所述文件属性修改请求对储存在所述元数据服务器中的文件属性信息进行修改；Send a file attribute modification request to the metadata server, and modify the file attribute information stored in the metadata server according to the file attribute modification request;
判断是否修改成功，若修改成功，则生成本地修改命令；Determine whether the modification is successful, and if the modification is successful, generate a local modification command;
根据所述本地修改命令对客户端本地缓存中的文件属性信息进行相应的修改，同时生成文件属性更新命令；Modify the file attribute information in the local cache of the client according to the local modification command, and generate a file attribute update command at the same time;
根据所述会话列表向多个客户端同时发送所述文件属性更新命令，分别对多个客户端本地缓存进行更新。The file attribute update command is simultaneously sent to multiple clients according to the session list, and the local caches of the multiple clients are respectively updated.
优选的，在上述多客户端元数据同步更新方法中，所述获取元数据服务器中的会话列表之前，还包括：Preferably, in the above multi-client metadata synchronous update method, before the acquisition of the session list in the metadata server, it also includes:
将文件系统挂载于本地目录中，使得所述本地目录中的所述多个客户端能够访问所述文件系统；mounting the file system in a local directory, so that the plurality of clients in the local directory can access the file system;
将所述多个客户端与元数据服务器与进行连接。Connect the plurality of clients to the metadata server.
优选的，在上述多客户端元数据同步更新方法中，所述文件属性信息为访问权限信息。Preferably, in the above multi-client metadata synchronous update method, the file attribute information is access right information.
本发明还提供了一种多客户端元数据同步更新系统，包括：The present invention also provides a multi-client metadata synchronization update system, including:
会话列表获取模块，用于获取元数据服务器中的会话列表，所述会话列表为所述元数据服务器与多个客户端建立的连接列表；A session list obtaining module, configured to obtain a session list in the metadata server, where the session list is a list of connections established between the metadata server and multiple clients;
发送请求模块，用于发送文件属性修改请求至所述元数据服务器；A sending request module, configured to send a file attribute modification request to the metadata server;
服务器修改模块，用于根据所述文件属性修改请求对储存在所述元数据服务器中的文件属性信息进行修改；A server modification module, configured to modify the file attribute information stored in the metadata server according to the file attribute modification request;
判断模块，用于判断是否修改成功，若修改成功，则生成本地修改命令；A judging module is used to judge whether the modification is successful, and if the modification is successful, generate a local modification command;
本地修改模块，用于根据所述本地修改命令对客户端本地缓存中的文件属性信息进行相应的修改，同时生成文件属性更新命令；A local modification module, configured to modify the file attribute information in the local cache of the client according to the local modification command, and generate a file attribute update command at the same time;
更新模块，用于根据所述会话列表向多个客户端同时发送所述文件属性更新命令，分别对多个客户端本地缓存进行更新。An update module, configured to simultaneously send the file attribute update command to multiple clients according to the session list, and update the local caches of multiple clients respectively.
优选的，上述多客户端元数据同步更新系统中，还包括：Preferably, in the above-mentioned multi-client metadata synchronous update system, it also includes:
访问模块，用于将文件系统挂载于本地目录中，使得所述本地目录中的所述多个客户端能够访问所述文件系统；An access module, configured to mount a file system in a local directory, so that the multiple clients in the local directory can access the file system;
连接模块，用于将所述多个客户端与元数据服务器与进行连接。A connection module, configured to connect the plurality of clients with the metadata server.
优选的，上述多客户端元数据同步更新系统中，所述元数据服务器包括集中式元数据服务器以及分散式元数据服务器。Preferably, in the above multi-client metadata synchronization update system, the metadata server includes a centralized metadata server and a distributed metadata server.
从上述技术方案可以看出，本发明所提供的一种多客户端元数据同步更新方法，获取元数据服务器中的会话列表，所述会话列表为所述元数据服务器与多个客户端建立的连接列表；发送文件属性修改请求至所述元数据服务器，根据所述文件属性修改请求对储存在所述元数据服务器中的文件属性信息进行修改；判断是否修改成功，若修改成功，则生成本地修改命令；根据所述本地修改命令对客户端本地缓存中的文件属性信息进行相应的修改，同时生成文件属性更新命令；根据所述会话列表向多个客户端同时发送所述文件属性更新命令，分别对多个客户端本地缓存进行更新。It can be seen from the above technical solution that the multi-client metadata synchronous update method provided by the present invention obtains the session list in the metadata server, and the session list is established between the metadata server and multiple clients connection list; send a file attribute modification request to the metadata server, and modify the file attribute information stored in the metadata server according to the file attribute modification request; determine whether the modification is successful, and if the modification is successful, generate a local Modifying the command; modifying the file attribute information in the local cache of the client according to the local modification command, and generating a file attribute update command; sending the file attribute update command to multiple clients simultaneously according to the session list, Update the local caches of multiple clients separately.
由于元数据服务器与客户端建立了连接，客户端从元数据服务器中获取了元数据服务器与多个客户端建立的连接列表，即会话列表，当有一个客户端的本地缓存中的文件属性信息被修改，那么这个客户端将根据会话列表向其它客户端发出更新命令，其它客户端也对各自的本地缓存中的文件属性信息进行修改，同时，由于在对客户端本地缓存中的文件属性信息进行修改时，首先需要对与其建立连接的元数据服务器进行修改，因此，本申请实现了元数据服务器以及多个客户端中的文件属性信息修改的同步性，提高了工作效率，以及多客户端的文件属性信息修改的准确率。Since the metadata server has established a connection with the client, the client obtains the list of connections established between the metadata server and multiple clients from the metadata server, that is, the session list. When the file attribute information in the local cache of a client is modification, then this client will issue an update command to other clients according to the session list, and other clients will also modify the file attribute information in their local cache. When modifying, it is first necessary to modify the metadata server with which the connection is established. Therefore, this application realizes the synchronization of file attribute information modification in the metadata server and multiple clients, improves work efficiency, and multi-client file The accuracy rate of attribute information modification.
本发明还提供了一种多客户端元数据同步更新系统，实现了元数据服务器以及多个客户端中的文件属性信息修改的同步性。The present invention also provides a multi-client metadata synchronous update system, which realizes the synchronization of modification of file attribute information in the metadata server and multiple clients.
附图说明Description of drawings
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据提供的附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.
图1为本发明提供的一种多客户端元数据同步更新方法示意图；FIG. 1 is a schematic diagram of a multi-client metadata synchronous update method provided by the present invention;
图2为本发明提供的一种多客户端元数据同步更新系统示意图。FIG. 2 is a schematic diagram of a multi-client metadata synchronous update system provided by the present invention.
具体实施方式detailed description
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
请参阅图1，图1为本发明提供的一种多客户端元数据同步更新方法示意图。Please refer to FIG. 1 . FIG. 1 is a schematic diagram of a multi-client metadata synchronous update method provided by the present invention.
在一种具体的实施方式中，提供了一种多客户端元数据同步更新方法，主要包括以下步骤：In a specific implementation manner, a multi-client metadata synchronous update method is provided, which mainly includes the following steps:
步骤S1：获取元数据服务器中的会话列表，所述会话列表为所述元数据服务器与多个客户端建立的连接列表。元数据服务器保存了所有客户端的会话连接，形成了会话列表。某一客户端获取了会话列表，便于后续对其他客户端发送命令。Step S1: Obtain a session list in the metadata server, where the session list is a list of connections established between the metadata server and multiple clients. The metadata server saves the session connections of all clients and forms a session list. A client obtains the session list, which is convenient for sending commands to other clients later.
步骤S2：发送文件属性修改请求至所述元数据服务器，根据所述文件属性修改请求对储存在所述元数据服务器中的文件属性信息进行修改。Step S2: Send a file attribute modification request to the metadata server, and modify file attribute information stored in the metadata server according to the file attribute modification request.
文件属性修改请求可以为访问权限的修改请求等，要求元数据服务器按照文件属性修改请求进行修改，元数据服务器接收文件属性修改请求后，对储存在所述元数据服务器中的文件属性信息进行修改。The file attribute modification request can be a modification request of access rights, etc., and the metadata server is required to modify the file attribute modification request. After receiving the file attribute modification request, the metadata server modifies the file attribute information stored in the metadata server. .
步骤S3：判断是否修改成功，若修改成功，则生成本地修改命令；Step S3: judge whether the modification is successful, if the modification is successful, generate a local modification command;
具体的，元数据服务器收到客户端的文件属性修改请求，修改元数据服务器上保存的相关文件属性，之后向发起请求的客户端返回修改结果信息，客户端收到响应后根据修改结果信息判断是否修改本地缓存中的文件属性信息。具体的，元数据服务器将修改结果信息返回成功则生成本地修改命令，根据本地修改命令修改本地缓存中的文件属性信息，否则不修改。Specifically, the metadata server receives the file attribute modification request from the client, modifies the relevant file attributes stored on the metadata server, and then returns the modification result information to the requesting client. After receiving the response, the client judges whether Modify the file attribute information in the local cache. Specifically, if the metadata server returns the modification result information successfully, it generates a local modification command, and modifies the file attribute information in the local cache according to the local modification command, otherwise it does not modify it.
步骤S4：根据所述本地修改命令对客户端本地缓存中的文件属性信息进行相应的修改，同时生成文件属性更新命令。Step S4: correspondingly modify the file attribute information in the client's local cache according to the local modification command, and generate a file attribute update command at the same time.
对储存在所述元数据服务器中的文件属性信息进行修改完成后，将修改完成的结果反馈至客户端，如果结果为修改成功则生成本地修改命令，客户端接收到本地修改命令，并对客户端本地缓存中的文件属性信息进行相应的修改。After the modification of the file attribute information stored in the metadata server is completed, the result of the modification is fed back to the client. If the result is that the modification is successful, a local modification command is generated. The client receives the local modification command and sends the client Modify the file attribute information in the local cache of the client accordingly.
步骤S5：根据所述会话列表向多个客户端同时发送所述文件属性更新命令，分别对多个客户端本地缓存进行更新。Step S5: Send the file attribute update command to multiple clients at the same time according to the session list, and update the local caches of multiple clients respectively.
由于会话列表为所述元数据服务器与多个客户端建立的连接列表，如果元数据服务器成功修改了文件属性信息，则根据会话列表，客户端向所有其它客户端发起文件属性更新命令，文件属性更新命令的内容为更新的文件属性信息，其它客户端收到文件属性更新命令后，将旧的文件属性信息替换为修改后的文件属性信息，达到各自更新客户端本地缓存中的对应的文件属性信息，达到了所有客户端本地缓存中的文件属性信息和元数据服务器中的文件属性信息保持同步修改更新。Since the session list is a connection list established between the metadata server and multiple clients, if the metadata server successfully modifies the file attribute information, then according to the session list, the client initiates a file attribute update command to all other clients, and the file attribute The content of the update command is the updated file attribute information. After other clients receive the file attribute update command, they replace the old file attribute information with the modified file attribute information, so as to update the corresponding file attributes in the local cache of the client respectively. Information, so that the file attribute information in the local cache of all clients and the file attribute information in the metadata server are kept synchronously modified and updated.
由于元数据服务器与客户端建立了连接，客户端从元数据服务器中获取了元数据服务器与多个客户端建立的连接列表，即会话列表，当有一个客户端的本地缓存中的文件属性信息被修改，那么这个客户端将根据会话列表向其它客户端发出更新命令，其它客户端也对各自的本地缓存中的文件属性信息进行修改，同时，由于在对客户端本地缓存中的文件属性信息进行修改时，首先需要对与其建立连接的元数据服务器进行修改，因此，本申请实现了元数据服务器以及多个客户端中的文件属性信息修改的同步性，提高了工作效率，以及多客户端的文件属性信息修改的准确率。Since the metadata server has established a connection with the client, the client obtains the list of connections established between the metadata server and multiple clients from the metadata server, that is, the session list. When the file attribute information in the local cache of a client is modification, then this client will issue an update command to other clients according to the session list, and other clients will also modify the file attribute information in their local cache. When modifying, it is first necessary to modify the metadata server with which the connection is established. Therefore, this application realizes the synchronization of file attribute information modification in the metadata server and multiple clients, improves work efficiency, and multi-client file The accuracy rate of attribute information modification.
进一步的，所述获取元数据服务器中的会话列表之前，还包括：Further, before obtaining the session list in the metadata server, it also includes:
将文件系统挂载于本地目录中，使得所述本地目录中的所述多个客户端能够访问所述文件系统；mounting the file system in a local directory, so that the plurality of clients in the local directory can access the file system;
将所述多个客户端与元数据服务器与进行连接。Connect the plurality of clients to the metadata server.
在多个客户端的应用场景下，客户端访问存储服务器上的文件系统需要先挂载到本地目录，挂载的过程中客户端和元数据服务器建立连接。In the application scenario of multiple clients, the client needs to mount the file system on the storage server to a local directory before accessing the file system on the storage server. During the mounting process, the client establishes a connection with the metadata server.
更进一步的，所述文件属性信息为访问权限信息。Furthermore, the file attribute information is access right information.
元数据服务器为提供信息定位的资讯，包括信息的描述，比如数据的大小，使用权限等，因此，在元数据服务器中的文件属性信息可以为数据的大小或者访问权限信息等。The metadata server provides information on information location, including information descriptions, such as data size, usage rights, etc. Therefore, the file attribute information in the metadata server can be data size or access rights information.
请参考图2，图2为本发明提供的一种多客户端元数据同步更新系统示意图。Please refer to FIG. 2 , which is a schematic diagram of a multi-client metadata synchronous update system provided by the present invention.
在另一种具体的实施方式中，本发明还提供了一种多客户端元数据同步更新系统，包括：In another specific implementation manner, the present invention also provides a multi-client metadata synchronization update system, including:
会话列表获取模块06，用于获取元数据服务器中的会话列表，所述会话列表为所述元数据服务器与多个客户端建立的连接列表；A session list acquisition module 06, configured to acquire a session list in the metadata server, the session list being a list of connections established between the metadata server and multiple clients;
发送请求模块01，用于发送文件属性修改请求至所述元数据服务器；A sending request module 01, configured to send a file attribute modification request to the metadata server;
服务器修改模块02，用于根据所述文件属性修改请求对储存在所述元数据服务器中的文件属性信息进行修改；The server modification module 02 is configured to modify the file attribute information stored in the metadata server according to the file attribute modification request;
判断模块03，用于判断是否修改成功，若修改成功，则生成本地修改命令；Judging module 03, used to judge whether the modification is successful, if the modification is successful, then generate a local modification command;
本地修改模块04，用于根据所述本地修改命令对客户端本地缓存中的文件属性信息进行相应的修改，同时生成文件属性更新命令；The local modification module 04 is used to modify the file attribute information in the local cache of the client according to the local modification command, and generate a file attribute update command at the same time;
更新模块05，用于根据所述会话列表向多个客户端同时发送所述文件属性更新命令，分别对多个客户端本地缓存进行更新。会话列表获取模块06与更新模块05相连，将会话列表发送至更新模块05中。The update module 05 is configured to simultaneously send the file attribute update command to multiple clients according to the session list, and update the local caches of multiple clients respectively. The session list acquisition module 06 is connected to the update module 05, and sends the session list to the update module 05.
进一步的，上述多客户端元数据同步更新系统中，还包括：Further, the above multi-client metadata synchronization update system also includes:
访问模块，用于将文件系统挂载于本地目录中，使得所述本地目录中的所述多个客户端能够访问所述文件系统；An access module, configured to mount a file system in a local directory, so that the multiple clients in the local directory can access the file system;
连接模块，用于将所述多个客户端与元数据服务器与进行连接。A connection module, configured to connect the plurality of clients with the metadata server.
更进一步的，上述基于文件系统的多客户端元数据同步更新系统中，所述元数据服务器包括集中式元数据服务器以及分散式元数据服务器。集中式的元数据服务器就是在存储网络中只有一个元数据服务器节点，所有的元数据信息都汇聚在此，结构简单，传输数据速度快。分散式元数据服务器有多个元数据服务器节点，节点之间可以就相互拷贝元数据信息，壳存储大量元数据信息。具体根据需要选用任意一种服务器。Furthermore, in the file system-based multi-client metadata synchronous updating system, the metadata server includes a centralized metadata server and a distributed metadata server. A centralized metadata server means that there is only one metadata server node in the storage network, and all metadata information is gathered here, with a simple structure and fast data transmission speed. The distributed metadata server has multiple metadata server nodes, and the nodes can copy metadata information to each other, and the shell stores a large amount of metadata information. Choose any server according to your needs.
本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下，在其它实施例中实现。因此，本发明将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
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| CN201610561399.XACN105959420A (en) | 2016-07-15 | 2016-07-15 | Multi-client metadata synchronous update method and device |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610561399.XACN105959420A (en) | 2016-07-15 | 2016-07-15 | Multi-client metadata synchronous update method and device |
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| CN105959420Atrue CN105959420A (en) | 2016-09-21 |
| Application Number | Title | Priority Date | Filing Date |
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| CN201610561399.XAPendingCN105959420A (en) | 2016-07-15 | 2016-07-15 | Multi-client metadata synchronous update method and device |
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| RJ01 | Rejection of invention patent application after publication | Application publication date:20160921 |