CN108037897B - Metadata diffusion method, computer device and readable storage medium - Google Patents
Metadata diffusion method, computer device and readable storage medium Download PDFInfo
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- 238000009792 diffusion process Methods 0.000 title claims abstract description 31
- 238000012544 monitoring process Methods 0.000 claims abstract description 55
- 238000000034 method Methods 0.000 claims abstract description 44
- 238000004590 computer program Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/0604—Improving or facilitating administration, e.g. storage management
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/10—File systems; File servers
- G06F16/14—Details of searching files based on file metadata
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/10—File systems; File servers
- G06F16/18—File system types
- G06F16/182—Distributed file systems
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/10—File systems; File servers
- G06F16/18—File system types
- G06F16/1873—Versioning file systems, temporal file systems, e.g. file system supporting different historic versions of files
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0646—Horizontal data movement in storage systems, i.e. moving data in between storage devices or systems
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- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
- G06F3/067—Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]
Abstract
The invention discloses a method for diffusing metadata, which comprises the steps of mutually sending version information of local metadata among storage nodes, comparing the versions of the local metadata with the versions of the metadata of other storage nodes, and sending a request for acquiring the metadata to the storage node with higher metadata version to update the local metadata when the versions of the metadata of other storage nodes are higher than the versions of the local metadata. According to the method provided by the invention, the metadata are mutually diffused among the storage nodes, the storage node with the metadata of the latest version diffuses the metadata of the latest version to other storage nodes, and the metadata diffusion is realized without the need of regularly sending the metadata to each storage node in a group by the monitoring node, so that the pressure of the monitoring node is reduced, the monitoring node is prevented from becoming a system bottleneck, the metadata diffusion process is smoother, and the expansibility of a distributed system is improved.
Description
Technical Field
The present invention relates to the field of distributed systems, and in particular, to a method, a computer apparatus, and a computer-readable storage medium for metadata diffusion.
Background
Metadata, also called intermediate data and relay data, is data describing data, mainly information describing data attributes, and is used to support functions such as indicating storage locations, history data, resource search, file recording, and the like. In a distributed system, the metadata is diffused by a monitoring node to send metadata groups to all storage nodes at regular time to update the metadata versions of the storage nodes, which causes great pressure on the monitoring node, and causes the monitoring node to become a bottleneck of the system.
Therefore, it is a technical problem to be solved by those skilled in the art to provide a method for distributed system metadata diffusion that reduces the pressure of monitoring nodes.
Disclosure of Invention
The invention aims to provide a metadata diffusion method, a computer device and a computer readable storage medium, which are used for reducing the pressure of monitoring nodes, improving the rate of metadata diffusion and improving the expansibility of a distributed system.
To solve the above technical problem, the present invention provides a method for metadata diffusion, comprising:
the second storage node sends the version information of the second metadata to the first storage node;
the first storage node checks version information of first metadata, and if the version of the first metadata is lower than that of the second metadata, a request for acquiring the second metadata is sent to the second storage node to update the first metadata;
wherein the first metadata is metadata of the first storage node; the second metadata is metadata of the second storage node.
Optionally, the sending, by the second storage node, the version information of the second metadata to the first storage node specifically includes:
and the second storage node sends a heartbeat signal to the first storage node at regular time, wherein the heartbeat signal comprises the version information of the second metadata.
Optionally, the method further comprises:
when a monitoring node receives a request needing the metadata of the latest version, the monitoring node sends the metadata of the latest version to a storage node corresponding to the request.
Optionally, the sending, by the monitoring node, the metadata of the latest version to the corresponding storage node specifically includes:
and the monitoring node judges whether the local metadata of the corresponding storage node is the metadata of the latest version, and if not, the monitoring node sends the metadata of the latest version to the corresponding storage node.
Optionally, the specific case that the version of the first metadata is lower than the version of the second metadata is:
the version number of the first metadata is smaller than the version number of the second metadata.
Optionally, the specific case that the version of the first metadata is lower than the version of the second metadata is:
the generation time of the first metadata is earlier than the generation time of the second metadata.
Optionally, the method further comprises:
and the monitoring node updates local metadata at regular time.
To solve the above technical problem, the present invention further provides a computer apparatus, including:
a memory for storing instructions comprising the steps of a method of metadata diffusion as described in any of the above;
a processor to execute the instructions in the memory.
To solve the above technical problem, the present invention further provides a computer-readable storage medium having stored thereon a computer program, which when executed by a processor, implements the steps of the method of metadata diffusion as described in any one of the above.
The method for diffusing the metadata comprises the steps that version information of the local metadata is mutually sent among all storage nodes, the versions of the local metadata are compared with the versions of the metadata of other storage nodes, and when the versions of the metadata of other storage nodes are higher than the versions of the local metadata, a request for obtaining the metadata is sent to the storage node with the higher metadata version to update the local metadata. In the prior art, a monitoring node needs to send metadata of the latest version to each storage node at regular time, but not every storage node needs the metadata of the latest version, so the mode undoubtedly increases the working pressure of the monitoring node, and the monitoring node becomes the bottleneck of a system. In the method provided by the invention, the metadata are mutually diffused among the storage nodes, the storage node with the metadata of the latest version diffuses the metadata of the latest version to other storage nodes, and the metadata diffusion is realized without the need of regularly sending the metadata to each storage node in a group by the monitoring node, so that the pressure of the monitoring node is reduced, the monitoring node is prevented from becoming a system bottleneck, the metadata diffusion process is smoother, and the expansibility of a distributed system is improved. The invention also provides a computer device and a computer readable storage medium, which have the beneficial effects and are not described herein again.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the description of the embodiments or the prior 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 it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a flow chart of a method for metadata diffusion according to an embodiment of the present invention;
FIG. 2 is a flow chart of another method for metadata diffusion according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a computer device according to an embodiment of the present invention.
Detailed Description
The core of the invention is to provide a method, a computer device and a computer readable storage medium for metadata diffusion, which are used for reducing the pressure of monitoring nodes, improving the rate of metadata diffusion and improving the expansibility of a distributed system.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Fig. 1 is a flowchart of a method for metadata diffusion according to an embodiment of the present invention. As shown in fig. 1, the method of metadata diffusion includes:
s10: the second storage node sends version information of the second metadata to the first storage node.
S11: the first storage node checks the version information of the first metadata, and if the version of the first metadata is lower than that of the second metadata, a request for acquiring the second metadata is sent to the second storage node to update the first metadata.
The first metadata is metadata of the first storage node; the second metadata is metadata of the second storage node.
It should be noted that, in the embodiment of the present invention, the first storage node and the second storage node do not refer to a specific storage node, the first storage node refers to a storage node that receives version information, the second storage node refers to a storage node that sends version information, and accordingly, the first metadata refers to metadata local to the storage node that receives the version information, and the second metadata refers to metadata local to the storage node that sends the version information. Each storage node may be either a first storage node or a second storage node.
In a specific implementation, for step S10, at a certain time in the distributed system, not every storage node needs the latest metadata of the system, but each storage node finally needs to update the metadata for the diffusion of metadata. The metadata may be spread among the storage nodes by periodically or sporadically communicating between the storage nodes for data synchronization or the like, and the metadata version information of the other party may be inquired from each other or the local metadata version information may be notified to the other party during the communication.
Optionally, the second storage node may send the version information of the second metadata to the first storage node by means of a heartbeat signal sent by the second storage node to the first storage node, where the heartbeat signal carries the version information of the second metadata. The term "heartbeat signal" as used herein refers to a signal that is periodically transmitted between nodes in monitoring of the industrial equipment to determine whether or not the other node is "alive".
For step S11, the first storage node checks the version information of the first metadata, and compares which of the version of the first metadata and the version of the second metadata is higher, which may be comparing the version numbers of the two metadata, and generally, the metadata version with the smaller version number is lower; the generation time of the two metadata may be compared, where the generation time refers to the time when the metadata is first updated, and the latest metadata is generally updated by the monitoring node, so the generation time refers to the time when the metadata is generated at the monitoring node.
Since the actions of sending the version information between the storage nodes are mutual, steps S10 and S11 are embodied in a specific application, that is, the storage nodes send the version information of the local metadata to each other, and the storage node with the higher metadata version actively sends the metadata to the storage node with the lower metadata version, or the storage node with the lower metadata version actively requests the storage node with the higher metadata version.
The metadata diffusion method provided by the embodiment of the invention comprises the steps of mutually sending version information of local metadata among the storage nodes, comparing the versions of the local metadata with the versions of the metadata of other storage nodes, and sending a request for acquiring the metadata to the storage node with higher metadata version to update the local metadata when the versions of the metadata of other storage nodes are higher than the versions of the local metadata. In the prior art, a monitoring node needs to send metadata of the latest version to each storage node at regular time, but not every storage node needs the metadata of the latest version, so the mode undoubtedly increases the working pressure of the monitoring node, and the monitoring node becomes the bottleneck of a system. In the method provided by the invention, the metadata are mutually diffused among the storage nodes, the storage node with the metadata of the latest version diffuses the metadata of the latest version to other storage nodes, and the metadata diffusion is realized without the need of regularly sending the metadata to each storage node in a group by the monitoring node, so that the pressure of the monitoring node is reduced, the monitoring node is prevented from becoming a system bottleneck, the metadata diffusion process is smoother, and the expansibility of a distributed system is improved.
Fig. 2 is a flowchart of another metadata diffusion method according to an embodiment of the present invention. As shown in fig. 2, on the basis of the above embodiment, in another embodiment, the method for metadata diffusion further includes:
s20: when the monitoring node receives a request which needs the metadata of the latest version, the metadata of the latest version is sent to the storage node corresponding to the request.
Note that step S20 has no sequential relationship with other steps.
The monitoring node is generally a node in charge of updating metadata in the distributed system, and the monitoring node can periodically update the local metadata through monitoring the distributed system so as to be requested by a storage node needing the metadata of the latest version.
In the specific implementation, in the diffusion process of the metadata from the monitoring node to the storage nodes, the monitoring node in the prior art sends the metadata of the latest version to each storage node group at regular time, and instead, the storage node requiring the metadata of the latest version actively sends a request for retrieving the metadata of the latest version to the monitoring node. And the monitoring node sends the metadata of the latest version to the corresponding storage node after receiving the request for the metadata of the latest version. This greatly reduces the workload of the monitoring node to send metadata.
In order to further reduce the working pressure of the monitoring node, the storage node may have version information of the metadata local to the storage node in a request for requesting the latest version of the metadata to the monitoring node, so that the monitoring node first determines whether the metadata needs to be updated by the storage node, and sends the latest version of the metadata to the storage node when the metadata local to the storage node is not the latest version of the metadata. If the metadata local to the storage node is the latest version of metadata, the metadata does not need to be sent, and the work of sending the metadata once is omitted.
The method for diffusing metadata provided by the embodiment of the invention provides a method for expanding metadata from a monitoring node to a storage node, namely, the storage node needing the metadata of the latest version sends a request for requesting the metadata of the latest version to the monitoring node, and when the monitoring node receives the request for requesting the metadata of the latest version, the monitoring node sends the metadata of the latest version to the corresponding storage node. On the basis that the metadata are diffused from the storage nodes, the storage nodes ask for the metadata from the monitoring node when in need, the working pressure of the monitoring node is greatly reduced, and the process of diffusing the metadata in the system is smoother.
On the basis of the above embodiment, the monitoring node periodically updates the local metadata.
Fig. 3 is a schematic structural diagram of a computer device according to an embodiment of the present invention. As shown in FIG. 3, the computer apparatus, which may vary significantly depending on configuration or performance, may include one or more processors (CPUs) 310 (e.g., one or more processors) and memory 320, one or more storage media 330 (e.g., one or more mass storage devices) storing applications 333 or data 332. Memory 320 and storage media 330 may be, among other things, transient or persistent storage. The program stored on the storage medium 330 may include one or more modules (not shown), each of which may include a series of instruction operations for the computing device. Further, the processor 310 may be configured to communicate with the storage medium 330 to execute a series of instruction operations in the storage medium 330 on the computer device 300.
The computer device 300 may also include one or more power supplies 340, one or more wired or wireless network interfaces 350, one or more input-output interfaces 330, and/or one or more operating systems 331, such as Windows Server, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, and the like.
The steps in the method of metadata diffusion described above with reference to fig. 1 to 2 are implemented by a computer device based on the structure shown in fig. 3.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the computer apparatus and the computer-readable storage medium described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present application, it should be understood that the disclosed method, computer apparatus and computer-readable storage medium can be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of modules is merely a division of logical functions, and an actual implementation may have another division, for example, a plurality of modules or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form. Modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
In addition, functional modules in the embodiments of the present application may be integrated into one processing module, or each of the modules may exist alone physically, or two or more modules are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.
The integrated module, if implemented in the form of a software functional module and sold or used as a separate product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a function calling device, or a network device) to execute all or part of the steps of the method of the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The method, the computer device and the computer readable storage medium for metadata diffusion provided by the present invention are described in detail above. The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and 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. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (8)
1. A method of metadata diffusion, comprising:
the second storage node sends a heartbeat signal to the first storage node at regular time, wherein the heartbeat signal comprises version information of second metadata;
the first storage node checks version information of first metadata, and if the version of the first metadata is lower than that of the second metadata, a request for acquiring the second metadata is sent to the second storage node to update the first metadata;
wherein the first metadata is metadata of the first storage node; the second metadata is metadata of the second storage node; the first storage node and the second storage node are both any nodes in the distributed storage system.
2. The method of claim 1, further comprising:
when a monitoring node receives a request needing the metadata of the latest version, the monitoring node sends the metadata of the latest version to a storage node corresponding to the request.
3. The method according to claim 2, wherein the monitoring node sending the latest version of metadata to the corresponding storage node specifically comprises:
and the monitoring node judges whether the local metadata of the corresponding storage node is the metadata of the latest version, and if not, the monitoring node sends the metadata of the latest version to the corresponding storage node.
4. The method according to claim 1, wherein the version of the first metadata is lower than the version of the second metadata by:
the version number of the first metadata is smaller than the version number of the second metadata.
5. The method according to claim 1, wherein the version of the first metadata is lower than the version of the second metadata by:
the generation time of the first metadata is earlier than the generation time of the second metadata.
6. The method of any one of claims 1-5, further comprising:
and the monitoring node updates local metadata at regular time.
7. A computer device, comprising:
a memory for storing instructions comprising the steps of the method of metadata diffusion of any of claims 1 to 6;
a processor to execute the instructions in the memory.
8. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of metadata diffusion according to any one of claims 1 to 6.
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| CN103294675A (en) * | 2012-02-23 | 2013-09-11 | 上海盛霄云计算技术有限公司 | Method and device for updating data in distributed storage system |
| CN105426439A (en) * | 2015-11-05 | 2016-03-23 | 腾讯科技（深圳）有限公司 | Metadata processing method and device |
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| CN103294675A (en) * | 2012-02-23 | 2013-09-11 | 上海盛霄云计算技术有限公司 | Method and device for updating data in distributed storage system |
| CN105426439A (en) * | 2015-11-05 | 2016-03-23 | 腾讯科技（深圳）有限公司 | Metadata processing method and device |
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