CN112699091A - Distributed file sharing system and method - Google Patents
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- CN112699091A CN112699091A CN202110002828.0A CN202110002828A CN112699091A CN 112699091 A CN112699091 A CN 112699091A CN 202110002828 A CN202110002828 A CN 202110002828A CN 112699091 A CN112699091 A CN 112699091A
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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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- 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
- G06F16/148—File search processing
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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
- G06F16/17—Details of further file system functions
- G06F16/172—Caching, prefetching or hoarding of files
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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
- G06F16/17—Details of further file system functions
- G06F16/176—Support for shared access to files; File sharing support
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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
- G06F16/188—Virtual file systems
Abstract
The invention provides a distributed file sharing system and a distributed file sharing method, wherein at least one virtual child node and at least one level of virtual father nodes corresponding to each virtual child node are deployed in the system, the child cache data of edge node servers in the virtual child nodes are synchronized, the father cache data of father node servers in the virtual father nodes are synchronized, and through the hierarchical cache between the child cache and the father cache, a query request is sent to the corresponding virtual father nodes under the condition that the virtual child nodes cannot query results in the child caches of the virtual child nodes, so that the pressure of a source station is reduced, and the query efficiency is improved.
Description
Technical Field
The present invention relates to the field of distributed storage technologies, and in particular, to a distributed file sharing system and method.
Background
Content Delivery Network (CDN) manufacturers mostly adopt nginx to implement Content Delivery, and the storage generally adopts local file storage rather than distributed shared storage, where the local file storage has two disadvantages:
if the same request is forwarded to the same server in the local cluster, although the second request can be prevented from being forwarded to the source station, the load bias of the server in the cluster is easily caused;
if two requests are forwarded to a different server within the local cluster, the source pressure may be increased by forwarding the requests to the source in response to the content not being cached.
Disclosure of Invention
In view of this, the present invention provides a distributed file sharing system and method, which can improve the query efficiency while reducing the pressure of the source station.
In order to achieve the above purpose, the invention provides the following specific technical scheme:
a distributed file sharing system, comprising: at least one virtual child node and at least one level of virtual father node corresponding to each virtual child node;
the virtual child nodes are constructed by a plurality of edge node servers through LVS load balancing;
the virtual father node is constructed by a plurality of father node servers through LVS load balancing;
each edge node server comprises a sub-cache, and data synchronization is carried out among the sub-caches of the edge node servers corresponding to the virtual sub-nodes;
each father node server comprises a father cache, and data synchronization is carried out among the father caches of the father node servers corresponding to the virtual father nodes;
the virtual child nodes are used for querying in the local child cache after receiving a user request, feeding back query results to the user when the results are queried, and sending query requests to the corresponding virtual parent nodes when the results are not queried;
the virtual father node is used for inquiring in a local father cache after receiving an inquiry request sent by the virtual child node, feeding back an inquiry result to the virtual child node under the condition that the inquiry result is obtained, sending the inquiry request to the upper level virtual father node if the upper level virtual father node exists under the condition that the inquiry result is not obtained, and sending a source return request to a source station if the upper level virtual father node does not exist.
Optionally, each edge node server deploys a nginx service, a zookeeper service, and an ATS service;
each father node server is deployed with a nginx service, a zookeeper service and an ATS service.
Optionally, the nginx service is configured to forward the user request or the query request to the zookeeper service;
the zookeeper service is used for forwarding the user request or the query request to the ATS service;
the ATS service is used for inquiring in the local cache, feeding back an inquiry result to a request source under the condition that the inquiry result is obtained, sending an inquiry request to the upper-level virtual father node if the upper-level virtual father node exists under the condition that the inquiry result is not obtained, and sending a source returning request if the upper-level virtual father node does not exist, wherein the request source is the lower-level virtual father node or the virtual child node.
Optionally, the virtual father node is further configured to store the query result in a local father cache after receiving a query result fed back by the source station or the superior virtual father node, and send the query result to a corresponding request source, where the request source is the subordinate virtual father node or the virtual child node;
and the virtual child node is further used for storing the query result in a local child cache after receiving the query result fed back by the corresponding virtual parent node, and feeding back the query result to the user.
Optionally, the ATS service is further configured to store the query result in a local cache after receiving the query result fed back by the superior virtual parent node;
the Zookeeper also serves as a cache for synchronizing the query result to other node servers in the virtual node group through ICP, and the virtual node group where the Zookeeper serves is the virtual child node or the virtual father node.
Optionally, the ATS service is further configured to delete a server disk from the system when it is detected that the server disk is damaged.
Optionally, the distributed file sharing system further includes:
a backup service node corresponding to each virtual child node and a backup service node corresponding to each virtual parent node;
each virtual child node and each virtual father node serve as a main service node;
the main service node and the backup service node realize the main-backup switching through the survival service, and provide a virtual IP service to the outside.
A distributed file sharing method applied to the distributed file sharing system disclosed in the above embodiment, the method comprising:
the virtual child node inquires in a local child cache under the condition of receiving a user request;
under the condition that the result is inquired, the virtual child node feeds back the inquiry result to the user;
under the condition that the query result is not obtained, the virtual child node sends a query request to the corresponding virtual parent node;
the virtual father node receives a query request and queries in a local father cache;
under the condition that a result is inquired, the virtual parent node feeds back the inquiry result to the virtual child node;
under the condition that the query result cannot be obtained, the virtual father node judges whether the superior virtual father node exists or not;
if the superior virtual father node exists, the virtual father node sends a query request to the superior virtual father node;
and if the upper level virtual father node does not exist, the virtual father node sends a source returning request to the source station.
Optionally, the method further includes:
and the virtual father node stores the query result in a local father cache and sends the query result to a corresponding request source under the condition of receiving the query result fed back by the source station or the superior virtual father node, wherein the request source is the subordinate virtual father node or the virtual child node.
Optionally, the method further includes:
and after receiving the query result fed back by the corresponding virtual father node, the virtual child node stores the query result in a local child cache and feeds back the query result to the user.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a distributed file sharing system, which is characterized in that at least one virtual child node and at least one level of virtual father node corresponding to each virtual child node are deployed in the system, the child cache data of an edge node server corresponding to the virtual child node are synchronized, the father cache data of a father node server corresponding to the virtual father node are synchronized, and a query request is sent to the corresponding virtual father node through the hierarchical cache between the child cache and the father cache under the condition that the virtual child node cannot query results in the child cache of the virtual child node, so that the pressure of a source station is reduced, and the query efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a distributed file sharing system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another distributed file sharing system according to an embodiment of the present disclosure;
FIG. 3 is a schematic structural diagram of another distributed file sharing system according to an embodiment of the present disclosure;
FIG. 4 is a schematic flowchart of a distributed file sharing method according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating another distributed file sharing method according to an embodiment of the present invention.
Detailed Description
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.
The inventor finds out through research that: nginx is used for supporting multi-core, high concurrency, high performance and convenient development of agent plug-ins. As a content distribution service, storage is a short board that it cannot keep back. In order to make up for the insufficient storage, the open source ats (apache Traffic server) has an HTTP proxy server and is also an HTTP cache server through test and verification, and can cache any byte stream data. The concurrency capability and performance of the method are slightly inferior to those of nginx, especially in the aspect of development, the plug-in supports nginx to occupy the absolute advantage, but the hierarchical storage architecture and the storage capability of the method are strong. The nginx and ATS are combined to construct a distributed file sharing system, the characteristics are respectively exerted and perfectly combined, and the constructed distributed file sharing system has the advantages of strong concurrency capability and high storage performance.
On this basis, the embodiment of the present invention discloses a distributed file sharing system, please refer to fig. 1, which includes at least one virtual child node and at least one level of virtual parent node corresponding to each virtual child node.
It can be understood that, in order to fully exert the concurrency capability of the distributed file sharing system, the distributed file sharing system may include a plurality of virtual child nodes, and the plurality of virtual child nodes may be divided by regions, for example, each of the city regions includes a plurality of virtual child nodes, the plurality of virtual child nodes of the city regions correspond to virtual parent nodes of the provincial regions, and the plurality of virtual parent nodes of the provincial regions correspond to virtual parent nodes of the region levels, which should be illustrated, the above is only an example, and the present invention is not limited thereto.
The virtual subnode is constructed by a plurality of edge node servers through LVS load balancing, each edge node server comprises a subcache, data synchronization is carried out among the subcaches of the edge node servers corresponding to the virtual subnode, and when one edge node server fails, the virtual subnode can still stably operate.
Correspondingly, the virtual father node is constructed by a plurality of father node servers through LVS load balancing, each father node server comprises a father cache, data synchronization is carried out among the father caches of the father node servers in the virtual father node, and when one father node server fails in a disk, the virtual father node can still stably operate.
Specifically, the virtual child node is configured to, after receiving a user request, query in a local child cache in the edge node server corresponding to the main service node according to the user request, feed back a query result to the user when the query result is obtained, and send the query request to the corresponding virtual parent node when the query result is not obtained.
The virtual father node is used for inquiring in a father node server local father cache corresponding to the main service node after receiving the inquiry request sent by the virtual child node, feeding back the inquiry result to the virtual child node under the condition that the inquiry result is obtained, sending the inquiry request to the superior virtual father node if the superior virtual father node exists under the condition that the inquiry result is not obtained, and sending the source return request to the source station if the superior virtual father node does not exist. Wherein, the role of the superior virtual father node is the same as that of the virtual father node.
In the distributed file sharing system disclosed in this embodiment, through the hierarchical cache between the child cache and the parent cache, when the result cannot be queried in the child cache of the virtual group node group, the query request is sent to the corresponding virtual parent node, so that the pressure of a source station is reduced, and the query efficiency is improved.
Further, after the source station feeds back the query result to the last-level virtual father node, the virtual father node stores the query result in a local father cache and sends the query result to a corresponding request source, wherein the request source is a subordinate virtual father node or a virtual child node.
That is to say, the virtual parent node is further configured to store the query result in the local parent cache after receiving the query result fed back by the source station or the upper level virtual parent node, and send the query result to the corresponding request source.
And the virtual child node is also used for storing the query result in a local child cache after receiving the query result fed back by the corresponding virtual parent node, and feeding the query result back to the user.
That is, for each back-to-source request, the query results fed back by the source station are sequentially locally cached according to the sequence of the request chain, and the query can be locally cached after the same request is sent by the user next time, without sending back-to-source requests to the source station.
Further, in order to improve the stability of the distributed file sharing system, please refer to fig. 2, the distributed file sharing system further includes: and each virtual child node and each virtual father node serve as a main service node for providing services to the outside.
The edge node Server establishes a main service node and a backup service node through LVS (Linux Virtual Server) load balancing. The parent node server constructs a main service node and a backup service node through LVS load balancing so as to provide more stable service.
The main service node and the backup service node realize the main-backup switching through keep alive (keepalive) service, and provide a virtual IP service to the outside.
Specifically, under normal conditions, the main service node provides external services, the state of the main service node is detected in real time by the survival service, when the main service node cannot provide normal services, the main-standby switching is realized, and the backup service node provides external services.
Further, referring to fig. 3, each edge node server deploys a nginx service, a zookeeper service, and an ATS service, and each parent node server also deploys a nginx service, a zookeeper service, and an ATS service.
Each server deploys nginx service, and high-speed forwarding is achieved by using the advantages of supporting multiple cores and high concurrency.
And meanwhile, the ATS service is deployed on each server and is set to be transparent forwarding, and the caching quantity is enhanced by utilizing the strong storage capacity of the ATS service.
And each server deploys a zookeeper service to ensure the synchronization of the ATS service and the consistency of data.
Specifically, in each request processing process, the distribution service nginx receives a user request or a query request, and forwards the request to the zookeeper service. The zookeeper service is used for forwarding the user request or the query request to the ATS service; the ATS service is used for inquiring in the local cache, feeding back an inquiry result to a request source under the condition that the inquiry result is obtained, sending an inquiry request to an upper-level virtual father node if the upper-level virtual father node exists under the condition that the inquiry result is not obtained, and sending a source returning request if the upper-level virtual father node does not exist, wherein the request source is a lower-level virtual father node or a virtual child node.
The Nginx request uses multiple parent caches, and when a parent cache is requested to be unavailable, the Nginx request is diverted to another parent cache for service. The order of the parent cache queries may be specified by a configuration file, traversing the parent cache list in a round robin fashion.
Nginx requests a hierarchical cache, a sub-cache of the hierarchical cache receives the request, if cache contents do not exist, the sub-cache forwards the request to a father cache, if the cache contents do not exist, contents in other father cache lists are polled, the cache contents are inquired, the father cache sends a content copy to the sub-cache, the sub-cache stores one piece of content and responds to the Nginx request, and the subsequent request for the resource can be directly hit from the sub-cache and corresponding content is returned.
The ATS service is also used for storing the query result in a local cache after receiving the query result fed back by the superior virtual father node;
the Zookeeper also serves as a cache for synchronizing the query result to other node servers in the virtual node group through ICP, and the virtual node group where the Zookeeper serves is the virtual child node or the virtual father node.
In summary, in the distributed file sharing system disclosed in this embodiment, by adopting distributed deployment, cache contents are stored in cache systems of different servers, so as to enhance storage capacity, and by means of hierarchical caching between the child cache and the parent cache, when a virtual group node group cannot query results in its own child cache, a query request is sent to a corresponding virtual parent node, so that the pressure of a source station is reduced, and the query efficiency is improved.
According to the distributed file sharing system disclosed by the embodiment, the storage content can be quickly synchronized to file systems of different servers by adopting shared storage.
In addition, according to the distributed file sharing system disclosed in this embodiment, when a disk of a certain server in the cluster fails, the ATS can identify and remove the failed disk, and is transparent to the service distribution.
The embodiment discloses a distributed file sharing method, which is applied to a distributed file sharing system disclosed in the above embodiment, and referring to fig. 4, the distributed file sharing method specifically includes the following steps:
s101: the virtual child node inquires in a local child cache under the condition of receiving a user request;
s102: the virtual child node judges whether a result is inquired;
in the case of querying the result, S103: the virtual child node feeds back a query result to the user;
in the case that the query does not have a result, S104: the virtual child node sends a query request to the corresponding virtual father node;
s105: the virtual father node receives the query request and queries in the local father cache;
s106: the virtual father node judges whether a result is inquired;
in the case of a result being queried, S107: the virtual father node feeds back a query result to the virtual child node;
in the case that the query does not have a result, S108: the virtual father node judges whether a superior virtual father node exists or not;
if the upper level virtual father node exists, S109: the virtual father node sends a query request to a superior virtual father node;
if there is no upper level virtual parent node, S110: the virtual parent node sends a back-source request to the source station.
It can be seen that, in the distributed file sharing method disclosed by the method, at least one virtual child node and at least one level of virtual father node corresponding to each virtual child node are deployed in the system, the child cache data of the edge node servers corresponding to the virtual child nodes are synchronized, the father cache data of the father node servers corresponding to the virtual father nodes are synchronized, and through the hierarchical cache between the child cache and the father cache, a query request is sent to the corresponding virtual father node under the condition that the virtual child node cannot query results in the child cache of the virtual child node, so that the pressure of a source station is reduced, and the query efficiency is improved.
Referring to fig. 5, after sending the request to the source, another distributed file sharing method disclosed in this embodiment is as follows:
s201: and the virtual father node receives the query result fed back by the source station or the superior virtual father node.
S202: the virtual father node stores the query result in a local father cache and sends the query result to a corresponding request source, wherein the request source is a subordinate virtual father node or a virtual child node.
S203: and after receiving the query result fed back by the corresponding virtual father node, the virtual child node stores the query result in a local child cache and feeds back the query result to the user.
As can be seen, in the distributed file sharing method disclosed in this embodiment, for each source returning request, the query results fed back by the source station are locally cached in sequence according to the sequence of the request chain, that is, the request sequence between the upper-level virtual father node and the lower-level virtual father node and the request sequence between the virtual father node and the virtual child node, and after the next user sends the same request, the query can be locally cached without sending the source returning request to the source station.
The embodiments in the present description are described in a progressive manner, 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 is further noted that, herein, relational terms such as first and second, and the like may be 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.
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 above embodiments can be combined arbitrarily, and the features described in the embodiments in the present specification can be replaced or combined with each other in the above description of the disclosed embodiments, so that those skilled in the art can implement or use the present application.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A distributed file sharing system, comprising: at least one virtual child node and at least one level of virtual father node corresponding to each virtual child node;
the virtual child nodes are constructed by a plurality of edge node servers through LVS load balancing;
the virtual father node is constructed by a plurality of father node servers through LVS load balancing;
each edge node server comprises a sub-cache, and data synchronization is carried out among the sub-caches of the edge node servers corresponding to the virtual sub-nodes;
each father node server comprises a father cache, and data synchronization is carried out among the father caches of the father node servers corresponding to the virtual father nodes;
the virtual child nodes are used for querying in the local child cache after receiving a user request, feeding back query results to the user when the results are queried, and sending query requests to the corresponding virtual parent nodes when the results are not queried;
the virtual father node is used for inquiring in a local father cache after receiving an inquiry request sent by the virtual child node, feeding back an inquiry result to the virtual child node under the condition that the inquiry result is obtained, sending the inquiry request to the upper level virtual father node if the upper level virtual father node exists under the condition that the inquiry result is not obtained, and sending a source return request to a source station if the upper level virtual father node does not exist.
2. The system according to claim 1, wherein each edge node server deploys a nginx service, a zookeeper service and an ATS service;
each father node server is deployed with a nginx service, a zookeeper service and an ATS service.
3. The system of claim 2, wherein the nginx service is configured to forward the user request or the query request to the zookeeper service;
the zookeeper service is used for forwarding the user request or the query request to the ATS service;
the ATS service is used for inquiring in the local cache, feeding back an inquiry result to a request source under the condition that the inquiry result is obtained, sending an inquiry request to the upper-level virtual father node if the upper-level virtual father node exists under the condition that the inquiry result is not obtained, and sending a source returning request if the upper-level virtual father node does not exist, wherein the request source is the lower-level virtual father node or the virtual child node.
4. The system according to claim 1, wherein the virtual parent node is further configured to, after receiving a query result fed back by a source station or an upper level virtual parent node, store the query result in a local parent cache, and send the query result to a corresponding request source, where the request source is the lower level virtual parent node or the virtual child node;
and the virtual child node is further used for storing the query result in a local child cache after receiving the query result fed back by the corresponding virtual parent node, and feeding back the query result to the user.
5. The system according to claims 2 and 4, wherein the ATS service is further configured to save the query result in a local cache after receiving the query result fed back by the upper level virtual parent node;
the Zookeeper also serves as a cache for synchronizing the query result to other node servers in the virtual node group through ICP, and the virtual node group where the Zookeeper serves is the virtual child node or the virtual father node.
6. The system of claim 2, wherein the ATS service is further configured to remove a server disk from the system when it is detected that it is defective.
7. The system of claim 1, wherein the distributed file sharing system further comprises:
a backup service node corresponding to each virtual child node and a backup service node corresponding to each virtual parent node;
each virtual child node and each virtual father node serve as a main service node;
the main service node and the backup service node realize the main-backup switching through the survival service, and provide a virtual IP service to the outside.
8. A distributed file sharing method applied to the distributed file sharing system according to any one of claims 1 to 7, the method comprising:
the virtual child node inquires in a local child cache under the condition of receiving a user request;
under the condition that the result is inquired, the virtual child node feeds back the inquiry result to the user;
under the condition that the query result is not obtained, the virtual child node sends a query request to the corresponding virtual parent node;
the virtual father node receives a query request and queries in a local father cache;
under the condition that a result is inquired, the virtual parent node feeds back the inquiry result to the virtual child node;
under the condition that the query result cannot be obtained, the virtual father node judges whether the superior virtual father node exists or not;
if the superior virtual father node exists, the virtual father node sends a query request to the superior virtual father node;
and if the upper level virtual father node does not exist, the virtual father node sends a source returning request to the source station.
9. The method of claim 8, further comprising:
and the virtual father node stores the query result in a local father cache and sends the query result to a corresponding request source under the condition of receiving the query result fed back by the source station or the superior virtual father node, wherein the request source is the subordinate virtual father node or the virtual child node.
10. The method of claim 8, further comprising:
and after receiving the query result fed back by the corresponding virtual father node, the virtual child node stores the query result in a local child cache and feeds back the query result to the user.
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| 李聪颖;王瑞刚;梁小江;: "CDN技术的研究与设计", 物联网技术, no. 12 * |
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| CN115499285A (en) * | 2021-06-18 | 2022-12-20 | 中国科学院声学研究所 | Method for constructing name resolution system provided by distributed hierarchical time delay |
| CN115499285B (en) * | 2021-06-18 | 2023-11-24 | 中国科学院声学研究所 | Method for constructing name resolution system provided by distributed hierarchical time delay |
| CN115314512A (en) * | 2022-10-09 | 2022-11-08 | 中孚信息股份有限公司 | Massive terminal data synchronization method and system |
| CN115314512B (en) * | 2022-10-09 | 2023-02-17 | 中孚信息股份有限公司 | Massive terminal data synchronization method and system |
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