CN106446097B - File reading method and system - Google Patents
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- CN106446097B CN106446097B CN201610820869.XA CN201610820869A CN106446097B CN 106446097 B CN106446097 B CN 106446097B CN 201610820869 A CN201610820869 A CN 201610820869A CN 106446097 B CN106446097 B CN 106446097B
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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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- 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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- 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
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Abstract
The invention discloses a file reading method and a file reading system. The method is applied to the client and comprises the following steps: receiving a reading request of a user for a target file; determining whether cache data corresponding to the target file is stored locally; if yes, directly outputting cache data corresponding to the locally stored target file; if not, sending the reading request to the server so that the server returns the cache data corresponding to the target file according to the reading request; receiving cache data corresponding to a target file returned by a server; and locally storing and outputting the cache data corresponding to the target file. By applying the technical scheme provided by the embodiment of the invention, the problem of long response time of the client to the reading request of the user due to the interaction delay of the client and the server can be avoided, and the response speed is improved.
Description
Technical Field
The invention relates to the technical field of computer application, in particular to a file reading method and a file reading system.
Background
With the rapid development of computer application technology, distributed storage systems are gradually increased. In the distributed storage system, a user can send a reading request to a server through a client to read a corresponding file in the distributed storage system. Each reading operation of each client needs to be notified to the server, so that the interactive data volume between the client and the server is large, the interactive frequency is high, and the problem that the response time of the client to a reading request of a user is prolonged due to the interactive delay is easy to occur.
Disclosure of Invention
The invention aims to provide a file reading method and a file reading system, which are used for avoiding the problem of long response time of a client to a reading request of a user due to interaction delay of the client and a server and improving the response speed.
A file reading method is applied to a client and comprises the following steps:
receiving a reading request of a user for a target file;
determining whether cache data corresponding to the target file is stored locally;
if yes, directly outputting the locally stored cache data corresponding to the target file;
if not, sending the reading request to a server so that the server returns cache data corresponding to the target file according to the reading request; receiving cache data corresponding to the target file returned by the server; and locally storing and outputting the cache data corresponding to the target file.
In one embodiment of the present invention, the method further comprises:
when a write-in request of the user for the cache data corresponding to the target file is received, sending the write-in request to the server, so that the server determines whether to accept the write-in request or not according to the read-write state of the cache data corresponding to the target file in each client, and if so, returning first confirmation information;
if the first confirmation information is received, returning the first confirmation information to the user so that the user executes writing operation on the cache data corresponding to the target file;
and updating the cache data corresponding to the locally stored target file according to the write-in information of the user, and feeding back first update information to the server in real time, so that the server updates the target file according to the first update information, and sends the first update information to other clients storing the cache data corresponding to the target file.
In one embodiment of the present invention, the method further comprises:
receiving second confirmation information returned by the server, wherein the second confirmation information is information returned to the client by the server when the server determines that the write request is not accepted;
and returning the second confirmation information to the user to prompt that the user cannot write the cache data corresponding to the target file currently.
In one embodiment of the present invention, the method further comprises:
receiving second updating information which is sent by the server and aims at the target file;
and updating the cache data corresponding to the locally stored target file according to the second updating information.
In one embodiment of the present invention, the method further comprises:
and outputting updating prompt information to the user.
A file reading system comprises a client and a server, wherein,
the client is used for receiving a reading request of a user for a target file; determining whether cache data corresponding to the target file is stored locally; if yes, directly outputting the locally stored cache data corresponding to the target file; if not, sending the reading request to a server; receiving cache data corresponding to the target file returned by the server; locally storing and outputting cache data corresponding to the target file;
and the server is used for receiving the reading request sent by the client and returning the cache data corresponding to the target file according to the reading request.
In one embodiment of the present invention,
the client is further configured to send a write request to the server when receiving the write request of the user for the cache data corresponding to the target file; if first confirmation information returned by the server is received, returning the first confirmation information to the user so that the user executes write-in operation on the cache data corresponding to the target file; updating the cache data corresponding to the locally stored target file according to the write-in information of the user, and feeding back first update information to the server in real time;
the server is further configured to determine whether to accept the write request according to a read-write state of cache data corresponding to the target file in each client when receiving the write request for the target file sent by the client, and if so, return the first confirmation information; and when the first updating information sent by the client is received, updating the target file according to the first updating information, and sending the first updating information to other clients storing cache data corresponding to the target file.
In one embodiment of the present invention,
the server is further used for returning second confirmation information to the client when the write request is determined not to be accepted;
and the client is further configured to send the second confirmation information to the user when receiving the second confirmation information, so as to prompt that the user cannot write the cache data corresponding to the target file currently.
In one embodiment of the present invention,
and the client is further configured to update the locally stored cache data corresponding to the target file according to the second update information when receiving the second update information for the target file sent by the server.
In one embodiment of the present invention,
and the client is also used for outputting update prompt information to the user.
By applying the technical scheme provided by the embodiment of the invention, when receiving a reading request of a user for a target file, a client can firstly determine whether cache data corresponding to the target file is locally stored, if so, the cache data corresponding to the target file which is locally stored can be directly output, if not, the reading request can be sent to a server so that the server returns the cache data corresponding to the target file according to the reading request, and after receiving the cache data corresponding to the target file which is returned by the server, the client can locally store and output the cache data corresponding to the target file. Therefore, when a user has a reading requirement on the target file, the user can directly perform reading operation, such as browsing, checking and the like, on the cache data corresponding to the target file locally stored by the client, the user does not need to send a reading request to the server through the client every time, the interaction times of the client and the server are reduced, the problem that the response time of the client to the reading request of the user is long due to the interaction delay of the client and the server is solved, and the response speed 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 some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flowchart illustrating an implementation of a file reading method according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating another embodiment of a file reading method according to the present invention;
fig. 3 is a schematic structural diagram of a file reading system 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 embodiment of the invention provides a file reading method which can be applied to a client. The client is any one of a plurality of clients communicatively connected to a server of the distributed storage system.
Referring to fig. 1, which is a flowchart illustrating an implementation of a file reading method according to an embodiment of the present invention, the method may include the following steps:
s110: receiving a reading request of a user for a target file;
s120: and determining whether cache data corresponding to the target file is stored locally.
In the embodiment of the invention, when a user has a reading or writing requirement on the target file, a reading request aiming at the target file can be sent to the client firstly, and the reading or writing operation and the like can be continued on the target file after the target file is read.
When receiving a reading request of a user for a target file, a client may first determine whether cache data corresponding to the target file is stored locally.
In the embodiment of the invention, the server stores a plurality of files, and the target file is also stored in the server, however, if the user reads the target file before, the cache data of the target file can be locally stored in the client. The content of the target file is consistent with the content of the cache data corresponding to the target file.
If the client determines that the cache data corresponding to the target file is locally saved, the operation of step S130 may be performed, and if the client determines that the cache data corresponding to the target file is not locally saved, the operation of step S140 may be performed.
S130: and directly outputting the cache data corresponding to the locally stored target file.
If the client locally stores the cache data corresponding to the target file, the cache data corresponding to the target file can be directly output so as to respond to a reading request of a user for the target file. The user can directly browse and check the cache data corresponding to the target file on the client, and the content of the cache data corresponding to the target file is consistent with that of the target file, so that the user reads the cache data corresponding to the target file stored in the client, which is equivalent to reading the target file stored in the server.
S140: sending the reading request to a server so that the server returns cache data corresponding to the target file according to the reading request; receiving cache data corresponding to a target file returned by a server; and locally storing and outputting the cache data corresponding to the target file.
If the client does not locally store the cache data corresponding to the target file, it indicates that the user may not read the target file before, or the client performs a cleaning process on the file read by the user, and the like.
After receiving the read request, the server may return the cache data corresponding to the target file to the client according to the read request. The target file is stored in the server, and when the server receives a reading request sent by the client, the cache data corresponding to the target file can be generated according to the content of the current target file, so that the content of the target file is consistent with the content of the cache data corresponding to the target file.
The client receives the cache data corresponding to the target file returned by the server, and can output the cache data corresponding to the target file so as to respond to the reading request of the user for the target file.
Meanwhile, the client can also locally store the data file corresponding to the target file, so that when a reading request of the user for the target file is received again, the cache data corresponding to the locally stored target file can be directly output.
By applying the method provided by the embodiment of the invention, when receiving a reading request of a user for a target file, a client can determine whether cache data corresponding to the target file is locally stored or not, if so, the cache data corresponding to the target file which is locally stored can be directly output, if not, the reading request can be sent to a server so that the server returns the cache data corresponding to the target file according to the reading request, and after receiving the cache data corresponding to the target file which is returned by the server, the client can locally store and output the cache data corresponding to the target file. Therefore, when a user has a reading requirement on the target file, the user can directly perform reading operation, such as browsing, checking and the like, on the cache data corresponding to the target file locally stored by the client, the user does not need to send a reading request to the server through the client every time, the interaction times of the client and the server are reduced, the problem that the response time of the client to the reading request of the user is long due to the interaction delay of the client and the server is solved, and the response speed is improved.
Referring to fig. 2, in one embodiment of the present invention, the method may further comprise the steps of:
s150: when a write-in request of a user for the cache data corresponding to the target file is received, the write-in request is sent to the server, so that the server determines whether to accept the write-in request or not according to the read-write state of the cache data corresponding to the target file in each client, and if yes, first confirmation information is returned.
In the embodiment of the invention, when a user has a reading or writing requirement on the target file, a reading request aiming at the target file can be sent to the client firstly, and the reading or writing operation and the like can be continued on the target file after the target file is read.
When the client receives a read request of the user for the target file, the operations from step S120 to step S140 may be performed, so that the cache data corresponding to the target file is locally stored at the client. In this case, when the client receives a write request of the user for the cache data corresponding to the target file, the client needs to send the write request to the server.
It can be understood that, at the same time, there may be a plurality of clients simultaneously owning the cache data corresponding to the target file, that is, the plurality of clients respectively store the cache data corresponding to the target file. When a user corresponding to a certain client executes a write operation on the cache data corresponding to the target file, the content of the cache data corresponding to the target file is changed. In order to ensure the consistency of the cache data corresponding to the target file stored by each client, each client needs to send a write request to the server.
After receiving the write request, the server may query the read-write state of the cache data corresponding to the current target file in each client. If the read status is in the other clients, the server may accept the write request and return first confirmation information, and if the write status is in any one of the other clients, the server may determine not to accept the write request, may not process the write request, or return second confirmation information.
S160: and if the first confirmation information is received, returning the first confirmation information to the user so that the user executes writing operation on the cache data corresponding to the target file.
If the client receives the first confirmation information, it may be determined that the write operation may be currently performed on the cache data corresponding to the target file, and the first confirmation information may be returned to the user, so that the user performs the write operation on the cache data corresponding to the target file.
If the client does not receive any confirmation information which is returned by the server and aims at the write request, or receives second confirmation information, the client can determine that the write operation cannot be performed on the cache data corresponding to the target file currently, and in this case, no information can be returned to the user, or the second confirmation information is returned to the user, so as to prompt the user that the write operation cannot be performed on the cache data of the target file currently.
S170: and updating the cache data corresponding to the locally stored target file according to the write-in information of the user, and feeding back the first updating information to the server in real time, so that the server updates the target file according to the first updating information and sends the first updating information to other clients storing the cache data corresponding to the target file.
After receiving the first confirmation information, the user may perform a write operation on the cache data corresponding to the target file, and if the write operation is modified, deleted, or the like. And the client updates the cache data corresponding to the locally stored target file according to the write-in information of the user, and feeds back the first update information to the server in real time.
And the server updates the target file according to the first updating information and sends the first updating information to other clients which store the cache data corresponding to the target file. In this way, other clients can also update the cache data corresponding to the target file locally stored by the other clients in real time according to the first update information, so that the content of the cache data corresponding to the target file is consistent with the content of the target file.
In one embodiment of the invention, the method may further comprise the steps of:
the method comprises the following steps: receiving second updating information aiming at the target file sent by the server;
step two: and updating the cache data corresponding to the locally stored target file according to the second updating information.
For convenience of description, the above two steps are combined for illustration.
In the normal working process of the client, if second updating information aiming at the target file sent by the server is received, it is indicated that other clients write in the cache data corresponding to the target file stored locally by the client currently. In this case, the client may update the cache data corresponding to the locally stored target file according to the second update information. Therefore, no matter how often a user has read-write requirements on the target file, the cache data corresponding to the target file can be read in the client, and the content of the cache data corresponding to the target file is consistent with the content of the target file in the server.
Furthermore, the client may also output an update prompt message to the user, where the update prompt message may include specific update content, so that the user can know the content change condition of the target file in time.
Corresponding to the above method embodiment, an embodiment of the present invention further provides a file reading system, and a file reading system described below and a file reading method described above may be referred to in a corresponding manner.
Referring to fig. 3, the system may include a client 310 and a server 320, the client 310 being any one of a plurality of clients communicatively connected to the server, wherein:
the client 310 is used for receiving a reading request of a user for a target file; determining whether cache data corresponding to the target file is stored locally; if yes, directly outputting cache data corresponding to the locally stored target file; if not, sending the read request to the server 320; receiving cache data corresponding to the target file returned by the server 320; locally storing and outputting cache data corresponding to the target file;
and the server 320 is configured to receive the read request sent by the client 310, and return cache data corresponding to the target file according to the read request.
By applying the system provided by the embodiment of the invention, when receiving a reading request of a user for a target file, a client can determine whether cache data corresponding to the target file is locally stored or not, if so, the cache data corresponding to the target file which is locally stored can be directly output, if not, the reading request can be sent to a server so that the server returns the cache data corresponding to the target file according to the reading request, and after receiving the cache data corresponding to the target file which is returned by the server, the client can locally store and output the cache data corresponding to the target file. Therefore, when a user has a reading requirement on the target file, the user can directly perform reading operation, such as browsing, checking and the like, on the cache data corresponding to the target file locally stored by the client, the user does not need to send a reading request to the server through the client every time, the interaction times of the client and the server are reduced, the problem that the response time of the client to the reading request of the user is long due to the interaction delay of the client and the server is solved, and the response speed is improved.
In one embodiment of the invention:
the client 310 is further configured to send a write request to the server 320 when receiving a write request of a user for the cache data corresponding to the target file; if the first confirmation information returned by the server 320 is received, returning the first confirmation information to the user so that the user executes a write operation on the cache data corresponding to the target file; according to the write-in information of the user, updating the cache data corresponding to the locally stored target file, and feeding back the first updating information to the server 320 in real time;
the server 320 is further configured to, when receiving a write request for a target file sent by the client 310, determine whether to accept the write request according to a read-write state of cache data corresponding to the target file in each client, and if yes, return first confirmation information; when first update information sent by the client 310 is received, the target file is updated according to the first update information, and the first update information is sent to other clients storing cache data corresponding to the target file.
In one embodiment of the invention:
the server 320 is further configured to return second confirmation information to the client 310 when it is determined that the write request is not accepted;
the client 310 is further configured to send the second confirmation information to the user when receiving the second confirmation information, so as to prompt the user that the cache data corresponding to the target file cannot be written currently.
In one embodiment of the invention:
the client 310 is further configured to, when receiving second update information for the target file sent by the server 320, update the cache data corresponding to the target file stored locally according to the second update information.
In one embodiment of the invention:
the client 310 is further configured to output the update prompt information to the user.
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. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, 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 principle and the implementation of the present invention are explained in the present application by using specific examples, and the above description of the embodiments is only used to help understanding the technical solution and the core idea of the present invention. 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.
Claims (8)
1. A file reading method is applied to a client and comprises the following steps:
receiving a reading request of a user for a target file;
determining whether cache data corresponding to the target file is stored locally;
if yes, directly outputting the locally stored cache data corresponding to the target file;
if not, sending the reading request to a server so that the server returns cache data corresponding to the target file according to the reading request; receiving cache data corresponding to the target file returned by the server; locally storing and outputting cache data corresponding to the target file;
when a write-in request of the user for the cache data corresponding to the target file is received, sending the write-in request to the server, so that the server determines whether to accept the write-in request or not according to the read-write state of the cache data corresponding to the target file in each client, and if so, returning first confirmation information;
if the first confirmation information is received, returning the first confirmation information to the user so that the user executes writing operation on the cache data corresponding to the target file;
and updating the cache data corresponding to the locally stored target file according to the write-in information of the user, and feeding back first update information to the server in real time, so that the server updates the target file according to the first update information, and sends the first update information to other clients storing the cache data corresponding to the target file.
2. The file reading method according to claim 1, further comprising:
receiving second confirmation information returned by the server, wherein the second confirmation information is information returned to the client by the server when the server determines that the write request is not accepted;
and returning the second confirmation information to the user to prompt that the user cannot write the cache data corresponding to the target file currently.
3. The file reading method according to any one of claims 1 or 2, further comprising:
receiving second updating information which is sent by the server and aims at the target file;
and updating the cache data corresponding to the locally stored target file according to the second updating information.
4. The file reading method according to claim 3, further comprising:
and outputting updating prompt information to the user.
5. A file reading system is characterized by comprising a client and a server, wherein,
the client is used for receiving a reading request of a user for a target file; determining whether cache data corresponding to the target file is stored locally; if yes, directly outputting the locally stored cache data corresponding to the target file; if not, sending the reading request to a server; receiving cache data corresponding to the target file returned by the server; locally storing and outputting cache data corresponding to the target file;
the server is used for receiving a reading request sent by the client and returning the cache data corresponding to the target file according to the reading request;
the client is further configured to send a write request to the server when receiving the write request of the user for the cache data corresponding to the target file; if first confirmation information returned by the server is received, returning the first confirmation information to the user so that the user executes write-in operation on the cache data corresponding to the target file; updating the cache data corresponding to the locally stored target file according to the write-in information of the user, and feeding back first update information to the server in real time;
the server is further configured to determine whether to accept the write request according to a read-write state of cache data corresponding to the target file in each client when receiving the write request for the target file sent by the client, and if so, return the first confirmation information; and when the first updating information sent by the client is received, updating the target file according to the first updating information, and sending the first updating information to other clients storing cache data corresponding to the target file.
6. The document reading system according to claim 5,
the server is further used for returning second confirmation information to the client when the write request is determined not to be accepted;
and the client is further configured to send the second confirmation information to the user when receiving the second confirmation information, so as to prompt that the user cannot write the cache data corresponding to the target file currently.
7. Document reading system according to one of the claims 5 or 6,
and the client is further configured to update the locally stored cache data corresponding to the target file according to the second update information when receiving the second update information for the target file sent by the server.
8. The document reading system according to claim 7,
and the client is also used for outputting update prompt information to the user.
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| CN108011949B (en) * | 2017-11-30 | 2021-03-09 | 百度在线网络技术（北京）有限公司 | Method and apparatus for acquiring data |
| CN108712454B (en) * | 2018-02-13 | 2020-11-17 | 创新先进技术有限公司 | File processing method, device and equipment |
| CN110196679B (en) * | 2018-03-21 | 2023-01-17 | 腾讯科技（深圳）有限公司 | Distributed deployment system, object management method, device, medium and electronic equipment |
| CN110598138A (en) * | 2018-06-12 | 2019-12-20 | 北京京东尚科信息技术有限公司 | Cache-based processing method and device |
| CN109413176B (en) * | 2018-10-19 | 2021-06-08 | 中国银行股份有限公司 | Report downloading method and device |
| CN111339464B (en) * | 2020-02-19 | 2024-04-26 | 网易（杭州）网络有限公司 | Data processing method and device, electronic equipment and storage medium |
| CN114817140A (en) * | 2021-01-18 | 2022-07-29 | 华为技术有限公司 | Distributed file access method and related equipment |
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