CN110650204A - Data access method, device, equipment and storage medium of NAS cluster - Google Patents

Data access method, device, equipment and storage medium of NAS cluster Download PDF

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Publication number
CN110650204A
CN110650204A CN201910926613.0A CN201910926613A CN110650204A CN 110650204 A CN110650204 A CN 110650204A CN 201910926613 A CN201910926613 A CN 201910926613A CN 110650204 A CN110650204 A CN 110650204A
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node
data access
data
file system
nas cluster
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李养兆
仇锋利
李美欣
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Suzhou Wave Intelligent Technology Co Ltd
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Suzhou Wave Intelligent Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1097—Protocols in which an application is distributed across nodes in the network for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]

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  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)

Abstract

The invention discloses a data access method, a data access device, data access equipment and a computer readable storage medium of an NAS cluster. A data forwarding layer is arranged between a CIFS service layer and a local file system layer in advance, when a first node of an NAS cluster receives a data access request sent by a CIFS client, the data forwarding layer judges whether a mounting node of a local file system to which data to be accessed belongs is a first node; if so, sending the data access request to a local file system corresponding to the first node so that the first node directly returns a result to the CIFS client; if not, determining a target mount node of a local file system to which the data to be accessed belongs, and forwarding the data access request to the target mount node, so that the first node feeds back a return result of the target mount node to the CIFS client, thereby realizing that a user can access the data stored in the local file system through any node in the NAS cluster, having low complexity, fully utilizing the network bandwidth of the front end of the cluster, and improving the system performance.

Description

Data access method, device, equipment and storage medium of NAS cluster
Technical Field
The present invention relates to the field of NAS cluster technologies, and in particular, to a data access method, apparatus, device, and computer-readable storage medium for an NAS cluster.
Background
In the NAS cluster system, the protocol layer uses CIFS, the file system layer uses a cluster file system, and all data is stored in a single file system, i.e. a namespace, so that any node within the cluster can access all data. Because the cluster file system is high in complexity and difficult to maintain compared with the local file system. In order to reduce the complexity of the file system layer of the NAS cluster, the related art employs a local file system instead of a cluster file system.
However, since the local file system can only be mounted and read-write accessed by a single node in the cluster, when the CIFS client wants to access data stored in the local file system, the CIFS client can only send a request to the single cluster node mounting the file system, but cannot access through other nodes in the cluster, which results in low utilization rate of the network bandwidth of the front end of the cluster and reduced system performance.
Therefore, how to fully utilize the advantages of simplicity and reliability of the local file system, and simultaneously, not reducing the system performance and ensuring that the system has good maintainability is a problem to be solved by the technical personnel in the field.
Disclosure of Invention
The embodiment of the disclosure provides a data access method, a data access device, data access equipment and a computer-readable storage medium for an NAS cluster, which enable a user to access data stored in a local file system through any node in the NAS cluster, not only have low complexity, but also fully utilize the bandwidth of a cluster front-end network, improve the performance of the NAS cluster system, and ensure that the system has good maintainability.
In order to solve the above technical problems, embodiments of the present invention provide the following technical solutions:
an embodiment of the present invention provides a data access method for an NAS cluster, which is applied to a data forwarding layer, where the data forwarding layer is preset between a CIFS service layer and a local file system layer, and opens CIFS protocol service of all nodes of the NAS cluster, and the method includes:
when a first node of the NAS cluster receives a data access request sent by a CIFS client, judging whether a mount node of a local file system to which data to be accessed in the data access request belongs is the first node;
if so, sending the data access request to a local file system corresponding to the first node so that the first node directly returns a result to the CIFS client;
if not, determining a target mount node of a local file system to which the data to be accessed belongs, and forwarding the data access request to the target mount node, so that the first node feeds back a return result of the target mount node to the CIFS client.
Optionally, the data access request received by the target mount node includes indication information for sending the return result to the first node and location information of the first node, and the first node feeding back the return result of the target mount node to the CIFS client includes:
and the first node receives a return result sent by the target mounting node and feeds the return result back to the CIFS client.
Optionally, the feeding back, by the first node, the return result of the target mount node to the CIFS client includes:
and the first node feeds back the received return result to the CIFS client, wherein the return result is sent to the first node by the data forwarding layer after the data forwarding layer receives the return result of the target mounting node.
Optionally, after forwarding the data access request to the target mount node, the method further includes:
judging whether a request fed back by the target mounting node is received within a preset time period to successfully execute the instruction;
and if not, the data access request is sent to the target mounting node again, the log information in the first time period is sent in a packaging mode, and an error instruction is executed by a broadcast command, so that the target mounting node sends the log information in the second time period in a packaging mode.
Optionally, the forwarding the data access request to the target mount node is:
and forwarding the data access request to the target mount node through a backend network of the NAS cluster.
In another aspect, an embodiment of the present invention provides a data access device for an NAS cluster, where the data access device is applied to a data forwarding layer, the data forwarding layer is preset between a CIFS service layer and a local file system layer, and preset to start CIFS protocol services of all nodes of the NAS cluster, and the data access device includes:
the judging module is used for judging whether a mount node of a local file system to which data to be accessed in the data access request belongs is the first node or not when the first node of the NAS cluster receives the data access request sent by the CIFS client;
the request issuing module is used for sending the data access request to a local file system corresponding to the first node if the mount node of the local file system to which the data to be accessed in the data access request belongs is the first node, so that the first node directly returns a result to the CIFS client;
and the request forwarding module is configured to determine a target mount node of the local file system to which the data to be accessed belongs if the mount node of the local file system to which the data to be accessed belongs in the data access request is not the first node, and forward the data access request to the target mount node, so that the first node feeds back a return result of the target mount node to the CIFS client.
Optionally, the system further includes a suspected fault handling module, where the suspected fault handling module includes:
the request retransmission submodule is used for retransmitting the data access request to the target mounting node if the request successful execution instruction fed back by the target mounting node is not received within a preset time period, and transmitting the log information within a first time period in a packaging manner, and broadcasting a command execution error instruction so as to enable the target mounting node to transmit the log information within a second time period in a packaging manner;
the log information packaging and sending submodule is used for packaging and sending the log information in a first time period if a request successful execution instruction fed back by the target mounting node is not received in a preset time period;
and the broadcasting sub-module is used for broadcasting a command to execute an error command if the request fed back by the target mounting node is not received within a preset time period and the command is successfully executed, so that the target mounting node packs and sends the log information within a second time period.
Optionally, the request forwarding module further includes a feedback result forwarding sub-module, where the feedback result forwarding sub-module is configured to send a return result to the first node when receiving the return result of the target mount node, so that the first node feeds the return result back to the CIFS client.
An embodiment of the present invention further provides a data access device of a NAS cluster, including a processor, where the processor is configured to implement the steps of the data access method of the NAS cluster according to any one of the foregoing items when executing a computer program stored in a storage.
Finally, an embodiment of the present invention provides a computer-readable storage medium, where a data access program of a NAS cluster is stored on the computer-readable storage medium, and when executed by a processor, the data access program of the NAS cluster implements the steps of the data access method of the NAS cluster according to any previous item.
The technical scheme provided by the application has the advantages that the local file system is adopted to replace the cluster file system through the newly added data forwarding layer between the CIFS protocol layer and the local file system layer, the CIFS client can access all data in the cluster through any node of the cluster through the data forwarding layer, the complexity of the NAS cluster is reduced, the network bandwidth of the front end of the cluster is fully utilized, the performance of the NAS cluster system is improved, the system is guaranteed to have good maintainability, and the competitiveness of storage products is improved.
In addition, the embodiment of the invention also provides a corresponding implementation device, equipment and a computer readable storage medium for the data access method of the NAS cluster, so that the method has higher practicability, and the device, the equipment and the computer readable storage medium have corresponding advantages.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the related art, the drawings required to be used in the description of the embodiments or the related art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic flowchart of a data access method of an NAS cluster according to an embodiment of the present invention;
fig. 2 is a structural diagram of a data access apparatus of an NAS cluster according to an embodiment of the present invention;
fig. 3 is a structural diagram of another specific embodiment of a data access apparatus of a NAS cluster according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and claims of this application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may include other steps or elements not expressly listed.
Having described the technical solutions of the embodiments of the present invention, various non-limiting embodiments of the present application are described in detail below.
Referring to fig. 1, fig. 1 is a schematic flowchart of a data access method of an NAS cluster, which is applied to a data forwarding layer, where the data forwarding layer is preset between a CIFS service layer and a local file system layer, and starts CIFS protocol services of all nodes of the NAS cluster, and the embodiment of the present invention may include the following contents:
s101: when a first node of the NAS cluster receives a data access request sent by the CIFS client, determining whether a mount node of a local file system to which data to be accessed in the data access request belongs is the first node, if so, executing S102, and if not, executing S103.
In the embodiment of the present invention, the first node may be any storage node in the NAS cluster, the CIFS client sends a request to any node in the NAS cluster to request to access data in a certain file system, and after receiving the request, the first node of the NAS cluster performs an inspection in the data forwarding layer, and may determine whether the data to be accessed is stored in the local file system mounted by the first node according to the address information of the data to be accessed in the data access request.
S102: and sending the data access request to a local file system corresponding to the first node so that the first node directly returns a result to the CIFS client.
In the application, if the data to be accessed is stored in the local file system mounted by the first node, the data access request is sent to the local file system corresponding to the first node, the first node executes the data access request, and a result of executing the data access request is fed back to the CIFS client, where the result of executing the data access request may be the data to be accessed, for example.
S103: and determining a target mount node of a local file system to which the data to be accessed belongs, and forwarding the data access request to the target mount node so that the first node feeds back a return result of the target mount node to the CIFS client.
In the application, if the data to be accessed is not stored in the local file system mounted by the first node, a target mounting node corresponding to the local file system storing the data to be accessed needs to be determined, the data access request can be forwarded to the target mounting node through a backend network of the NAS cluster, and the target mounting node executes the data access request. The target mount node can directly feed back the result of executing the data access request to the data forwarding layer, then the data forwarding layer sends the returned result to the first node, and the first node feeds back the returned result to the CIFS client. Of course, if the data access request received by the target mount node includes the indication information for sending the returned result to the first node and the location information of the first node, the target mount node may directly send the result of executing the data access request to the first node, and then the first node feeds back the returned result to the CIFS client.
It should be noted that, the data forwarding layer may add a new plug-in the plug-in framework of the existing CIFS protocol layer, and the plug-in implements each step in the foregoing method embodiment, so as to implement the data forwarding function.
In the technical scheme provided by the embodiment of the invention, the data forwarding layer is additionally arranged between the CIFS protocol layer and the local file system layer, the local file system is adopted to replace the cluster file system, and the data forwarding layer is used for realizing that the CIFS client can access all data in the cluster through any node of the cluster, thereby reducing the complexity of the NAS cluster, fully utilizing the network bandwidth of the front end of the cluster, improving the performance of the NAS cluster system, ensuring that the system has good maintainability and improving the competitiveness of a storage product.
As an optional implementation manner, in order to respond to the data access request of the user in time, an information feedback mechanism may be further preset, that is, the first node and the target mount node may feed back an event processing result to the data forwarding layer in real time. Based on this, after S101, the method further includes:
judging whether a request fed back by a target mounting node is received within a preset time period, such as 10s, and executing the instruction successfully;
and if not, sending the data access request to the target mounting node again, packaging and sending the log information in the first time period, and broadcasting a command to execute an error instruction so that the target mounting node packages and sends the log information in the second time period.
In the embodiment of the invention, because an information feedback mechanism is preset, if a data forwarding layer does not timely receive an event processing result fed back by a node, the node is considered not to receive a data access request, or the node processes a data access request error or an information transmission error, in short, an NAS cluster breaks down, in order to improve the stability and reliability of the NAS cluster, accurately position the fault in time and quickly repair the fault, when the data access request is retransmitted, log information in a first time period can be packaged and sent and backed up for storage, and the data access request t can be sent for the first time in the first time period1During the time period from time-1 s to time t2 when the data access request is sent for the second time. When receiving a command sent by the data forwarding layer, the target mount node executes an error instruction, can package and send log information in a second time period, and performs backup storage, wherein the second time period can be the first time of sending a data access request t1During the period from time t to time t2 when the data access request is sent for the second time. The staff can be according to these two log information quick positioning trouble to in time maintain the place that breaks down, improve the cluster performance.
The embodiment of the invention also provides a corresponding implementation device for the data access method of the NAS cluster, so that the method has higher practicability. In the following, the data access device of the NAS cluster provided in the embodiment of the present invention is introduced, and the data access device of the NAS cluster described below and the data access method of the NAS cluster described above may be referred to correspondingly.
Referring to fig. 2, fig. 2 is a structural diagram of a data access apparatus of a NAS cluster in a specific implementation manner, which is applied to a data forwarding layer, where the data forwarding layer is preset between a CIFS service layer and a local file system layer, and preset to start CIFS protocol services of all nodes of the NAS cluster, and the data forwarding layer may include:
the determining module 201 is configured to, when a first node of the NAS cluster receives a data access request sent by the CIFS client, determine whether a mount node of a local file system to which data to be accessed in the data access request belongs is the first node.
The request issuing module 202 is configured to send the data access request to the local file system corresponding to the first node if the mount node of the local file system to which the data to be accessed in the data access request belongs is the first node, so that the first node directly returns a result to the CIFS client.
The request forwarding module 203 is configured to determine a target mount node of the local file system to which the data to be accessed belongs if the mount node of the local file system to which the data to be accessed belongs in the data access request is not the first node, and forward the data access request to the target mount node, so that the first node feeds back a return result of the target mount node to the CIFS client.
As an optional implementation manner, referring to fig. 3, for example, the data forwarding layer may further include a suspected fault handling module 204, where the suspected fault handling module 204 may include:
the request retransmission submodule is used for retransmitting the data access request to the target mounting node if the request successful execution instruction fed back by the target mounting node is not received within the preset time period, packaging and sending the log information within the first time period, and broadcasting a command execution error instruction so that the target mounting node packages and sends the log information within the second time period;
the log information packaging and sending submodule is used for packaging and sending the log information in the first time period if a request successful execution instruction fed back by the target mounting node is not received in the preset time period;
and the broadcasting sub-module is used for broadcasting a command to execute an error command if the request fed back by the target mounting node is not received within a preset time period and the command is successfully executed, so that the target mounting node packs and sends the log information within a second time period.
Optionally, in other embodiments of the embodiment of the present invention, for example, the request forwarding module 203 may further include a feedback result forwarding sub-module, where the feedback result forwarding sub-module is configured to send a return result to the first node when receiving the return result of the target mount node, so that the first node feeds back the return result to the CIFS client.
The functions of each functional module of the data access apparatus of the NAS cluster according to the embodiment of the present invention may be specifically implemented according to the method in the foregoing method embodiment, and the specific implementation process may refer to the related description of the foregoing method embodiment, which is not described herein again.
Therefore, the embodiment of the invention realizes that the user can access the data stored in the local file system through any node in the NAS cluster, not only has low complexity, but also makes full use of the bandwidth of the front-end network of the cluster, improves the performance of the NAS cluster system and ensures that the system has good maintainability.
An embodiment of the present invention further provides a data access device of an NAS cluster, which specifically includes:
a memory for storing a computer program;
a processor for executing a computer program to implement the steps of the data access method of the NAS cluster as described in any of the above embodiments.
The functions of each functional module of the data access device of the NAS cluster according to the embodiment of the present invention may be specifically implemented according to the method in the foregoing method embodiment, and the specific implementation process may refer to the related description of the foregoing method embodiment, which is not described herein again.
Therefore, the embodiment of the invention realizes that the user can access the data stored in the local file system through any node in the NAS cluster, not only has low complexity, but also makes full use of the bandwidth of the front-end network of the cluster, improves the performance of the NAS cluster system and ensures that the system has good maintainability.
The embodiment of the present invention further provides a computer-readable storage medium, in which a data access program of a NAS cluster is stored, and the data access program of the NAS cluster is executed by a processor, according to the steps of the data access method of the NAS cluster described in any one of the above embodiments. The storage medium may be various media capable of storing program codes, such as a U disk, a removable hard disk, a read-only memory, a random access memory, a magnetic disk, or an optical disk.
The functions of the functional modules of the computer-readable storage medium according to the embodiment of the present invention may be specifically implemented according to the method in the foregoing method embodiment, and the specific implementation process may refer to the related description of the foregoing method embodiment, which is not described herein again.
Therefore, the embodiment of the invention realizes that the user can access the data stored in the local file system through any node in the NAS cluster, not only has low complexity, but also makes full use of the bandwidth of the front-end network of the cluster, improves the performance of the NAS cluster system and ensures that the system has good maintainability.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The data access method, device, equipment and computer readable storage medium of the NAS cluster provided by the present invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present disclosure without departing from the principle of the present invention, and such improvements and modifications also fall within the scope of the claims of the present disclosure.

Claims (10)

1. A data access method of an NAS cluster is applied to a data forwarding layer, the data forwarding layer is preset between a CIFS service layer and a local file system layer, and CIFS protocol service of all nodes of the NAS cluster is started, and the method comprises the following steps:
when a first node of the NAS cluster receives a data access request sent by a CIFS client, judging whether a mount node of a local file system to which data to be accessed in the data access request belongs is the first node;
if so, sending the data access request to a local file system corresponding to the first node so that the first node directly returns a result to the CIFS client;
if not, determining a target mount node of a local file system to which the data to be accessed belongs, and forwarding the data access request to the target mount node, so that the first node feeds back a return result of the target mount node to the CIFS client.
2. The NAS cluster data access method according to claim 1, wherein the data access request received by the target mount node includes indication information for sending the return result to the first node and location information of the first node, and the first node feeds back the return result of the target mount node to the CIFS client includes:
and the first node receives a return result sent by the target mounting node and feeds the return result back to the CIFS client.
3. The NAS cluster data access method of claim 1, wherein the feeding back, by the first node, the returned result of the target mount node to the CIFS client comprises:
and the first node feeds back the received return result to the CIFS client, wherein the return result is sent to the first node by the data forwarding layer after the data forwarding layer receives the return result of the target mounting node.
4. The NAS cluster data access method according to any of claims 1-3, further comprising, after forwarding the data access request to the target mount node:
judging whether a request fed back by the target mounting node is received within a preset time period to successfully execute the instruction;
and if not, the data access request is sent to the target mounting node again, the log information in the first time period is sent in a packaging mode, and an error instruction is executed by a broadcast command, so that the target mounting node sends the log information in the second time period in a packaging mode.
5. The NAS cluster data access method as claimed in claim 4, wherein the forwarding the data access request to the target mount node is:
and forwarding the data access request to the target mount node through a backend network of the NAS cluster.
6. A data access device of an NAS cluster is applied to a data forwarding layer, the data forwarding layer is preset between a CIFS service layer and a local file system layer, and CIFS protocol service of all nodes of the NAS cluster is started in advance, and the data access device comprises:
the judging module is used for judging whether a mount node of a local file system to which data to be accessed in the data access request belongs is the first node or not when the first node of the NAS cluster receives the data access request sent by the CIFS client;
the request issuing module is used for sending the data access request to a local file system corresponding to the first node if the mount node of the local file system to which the data to be accessed in the data access request belongs is the first node, so that the first node directly returns a result to the CIFS client;
and the request forwarding module is configured to determine a target mount node of the local file system to which the data to be accessed belongs if the mount node of the local file system to which the data to be accessed belongs in the data access request is not the first node, and forward the data access request to the target mount node, so that the first node feeds back a return result of the target mount node to the CIFS client.
7. The NAS cluster data access apparatus as claimed in claim 6, further comprising a suspected fault handling module, the suspected fault handling module comprising:
the request retransmission submodule is used for retransmitting the data access request to the target mounting node if the request successful execution instruction fed back by the target mounting node is not received within a preset time period, and transmitting the log information within a first time period in a packaging manner, and broadcasting a command execution error instruction so as to enable the target mounting node to transmit the log information within a second time period in a packaging manner;
the log information packaging and sending submodule is used for packaging and sending the log information in a first time period if a request successful execution instruction fed back by the target mounting node is not received in a preset time period;
and the broadcasting sub-module is used for broadcasting a command to execute an error command if the request fed back by the target mounting node is not received within a preset time period and the command is successfully executed, so that the target mounting node packs and sends the log information within a second time period.
8. The data access apparatus of the NAS cluster of claim 7, wherein the request forwarding module further comprises a feedback result forwarding sub-module, and the feedback result forwarding sub-module is configured to send, when receiving a return result of the target mount node, the return result to the first node, so that the first node feeds the return result back to the CIFS client.
9. A data access apparatus of a NAS cluster comprising a processor for implementing the steps of the data access method of the NAS cluster according to any one of claims 1 to 5 when executing a computer program stored in a memory.
10. A computer-readable storage medium, on which a data access program of a NAS cluster is stored, which when executed by a processor implements the steps of the data access method of the NAS cluster according to any one of claims 1 to 5.
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Application publication date: 20200103