CN111104429A - Data access method and device - Google Patents
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- CN111104429A CN111104429A CN201911317080.2A CN201911317080A CN111104429A CN 111104429 A CN111104429 A CN 111104429A CN 201911317080 A CN201911317080 A CN 201911317080A CN 111104429 A CN111104429 A CN 111104429A
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Abstract
The application provides a data access method and a device, wherein the method comprises the following steps: acquiring a query request of a user for data in a block chain as a target query request; searching whether data corresponding to the target query request exists in a preset cache region; if so, acquiring data corresponding to the target query request from the cache region, and returning the data corresponding to the target query request to the user; if not, searching whether data corresponding to the target query request exists in the block chain; and if so, acquiring data corresponding to the target query request from the block chain, and returning the data corresponding to the target query request to the user. In the present application, access pressure of the block chain can be relieved in the above manner.
Description
Technical Field
The present application relates to the field of data processing technologies, and in particular, to a data access method and apparatus.
Background
With the development of blockchain technology, more and more blockchain-based applications are applied. And, the blockchain-based application stores the data in the blockchain as a distributed database with the blockchain.
When an application based on a blockchain initiates a data query request, a server needs to query data from the blockchain, but when the query amount is large, access pressure is caused to the blockchain, so how to reduce the access pressure of the blockchain becomes a problem.
Disclosure of Invention
In order to solve the foregoing technical problems, embodiments of the present application provide a data access method and apparatus, so as to achieve the purpose of reducing access pressure of a block chain, and the technical solution is as follows:
a method of data access, comprising:
acquiring a query request of a user for data in a block chain as a target query request;
searching whether data corresponding to the target query request exists in a preset cache region;
if so, acquiring data corresponding to the target query request from the cache region, and returning the data corresponding to the target query request to the user;
if not, searching whether data corresponding to the target query request exists in a target node of the block chain;
and if so, acquiring data corresponding to the target query request from the block chain, and returning the data corresponding to the target query request to the user.
Preferably, the searching whether data corresponding to the target query request exists in a preset cache region includes:
acquiring key information in the target query request;
performing Hash operation on the key information, wherein the operation result is used as a target keyword;
inquiring whether a key value pair matched with the target keyword exists in the cache region;
if yes, the obtaining data corresponding to the target query request from the cache region includes:
and obtaining a key value pair matched with the target keyword from the cache region, and taking the value in the key value pair as data corresponding to the target query request.
Preferably, after acquiring the data corresponding to the target query request from the block chain, the method further includes:
storing data corresponding to the target query request in the cache region.
Preferably, the storing the data corresponding to the target query request in the cache region includes:
acquiring key information in the target query request;
performing Hash operation on the key information, wherein the operation result is used as a key word;
and taking the data corresponding to the target query request as a value, and storing a key value pair consisting of the key word and the value in the cache region.
Preferably, the method further comprises:
and storing the mapping relation between the data corresponding to the target query request and the position information of the data in the block chain in the cache region.
A data access device, comprising:
the first acquisition module is used for acquiring a query request of a user for data in a block chain as a target query request;
the first searching module is used for searching whether data corresponding to the target query request exists in a preset cache region, if so, the second obtaining module is executed, and if not, the second searching module is executed;
the second obtaining module is configured to obtain data corresponding to the target query request from the cache region, and return the data corresponding to the target query request to the user;
the second searching module is configured to search whether data corresponding to the target query request exists in the block chain, and if so, execute a third obtaining module;
the third obtaining module is configured to obtain data corresponding to the target query request from a target node of the block chain, and return the data corresponding to the target query request to the user.
Preferably, the first lookup module includes:
the first obtaining sub-module is used for obtaining key information in the target query request;
the first determining submodule is used for carrying out Hash operation on the key information, and the operation result is used as a target keyword;
the first query submodule is used for querying whether a key value pair matched with the target key word exists in the cache region, and if so, the second acquisition submodule in the second acquisition module is executed;
and the second obtaining submodule is used for obtaining a key value pair matched with the target keyword from the cache region, and taking the value in the key value pair as data corresponding to the target query request.
Preferably, the apparatus further comprises:
and the first storage module is used for storing the data corresponding to the target query request in the cache region.
Preferably, the first storage module includes:
the third obtaining sub-module is used for obtaining key information in the target query request;
the second determining submodule is used for carrying out Hash operation on the key information, and the operation result is used as a key word;
and the storage sub-module is used for taking the data corresponding to the target query request as a value and storing a key value pair consisting of the key word and the value in the cache region.
Preferably, the apparatus further comprises:
and the second storage module is used for storing the mapping relation between the data corresponding to the target query request and the position information of the data in the block chain in the cache region.
Compared with the prior art, the beneficial effect of this application is:
in the method, when an inquiry request of a user for data in a block chain is obtained, whether data corresponding to a target inquiry request exists or not is firstly searched in a preset cache region, if so, the data corresponding to the target inquiry request is obtained from the cache region, the data corresponding to the target inquiry request is returned to the user, data inquiry in the block chain is not needed, and the access pressure of the block chain is reduced. If the data corresponding to the target query request does not exist in the cache region, the data corresponding to the target query request is continuously searched in the block chain, and the reliability of data query is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
FIG. 1 is a flow chart of a data access method provided herein;
FIG. 2 is another flow chart of a data access method provided herein;
FIG. 3 is a further flow chart of a data access method provided herein;
FIG. 4 is a sub-flow diagram of a data access method provided herein;
FIG. 5 is a further flow chart of a data access method provided herein;
fig. 6 is a schematic diagram of a logical structure of the data access device provided in the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.
The embodiment of the application discloses a data access method, which comprises the following steps: acquiring a query request of a user for data in a block chain as a target query request; searching whether data corresponding to the target query request exists in a preset cache region; if so, acquiring data corresponding to the target query request from the cache region, and returning the data corresponding to the target query request to the user; if not, searching whether data corresponding to the target query request exists in the block chain; and if so, acquiring data corresponding to the target query request from the block chain, and returning the data corresponding to the target query request to the user. In the present application, access pressure of a block chain can be relieved.
Referring to fig. 1, a data access method disclosed in an embodiment of the present application is described below, which may include:
and step S11, acquiring a query request of the user for the data in the block chain as a target query request.
In this embodiment, the application based on the blockchain may connect a certain node or a plurality of nodes in the blockchain. A user using a blockchain-based application may initiate a query request for data in the blockchain.
Accordingly, when the user initiates a query request for data in the blockchain at the front end, the service back end may obtain the query request for the data in the blockchain from the user and use the query request as a target query request.
Step S12, searching whether data corresponding to the target query request exists in a preset cache region.
If yes, go to step S13; if not, go to step S14.
In this embodiment, a cache region may be preset to cache historical data in the blockchain or a historical data query result for a data query request in the blockchain.
Preferably, in order to save the storage space of the cache region, the cache region may only cache the data with high query frequency. Specifically, the cache region may only cache data with a query frequency higher than the set frequency.
Step S13, obtaining data corresponding to the target query request from the cache area, and returning the data corresponding to the target query request to the user.
After finding the data corresponding to the target query request in step S12, in this step, the data corresponding to the target query request is obtained from the cache region, and the obtained data is returned to the user.
Step S14, searching whether data corresponding to the target query request exists in the block chain.
If the data corresponding to the target query request is not found from the cache area in step S12, this step continues to find whether there is data corresponding to the target query request in the blockchain.
If so, go to step S15.
Step S15, obtaining data corresponding to the target query request from the block chain, and returning the data corresponding to the target query request to the user.
After finding out that the data corresponding to the target query request exists in the blockchain in step S14, in this step, the data corresponding to the target query request is obtained from the blockchain, and the data corresponding to the target query request is returned to the user.
In the method and the device, when an inquiry request of a user for data in a block chain is obtained, whether the data corresponding to a target inquiry request exists or not is firstly searched in a preset cache region, if so, the data corresponding to the target inquiry request is obtained from the cache region, the data corresponding to the target inquiry request is returned to the user, data inquiry in the block chain is not needed, and the access pressure of the block chain is reduced. If the data corresponding to the target query request does not exist in the cache region, the data corresponding to the target query request is continuously searched in the block chain, and the reliability of data query is improved.
Moreover, when historical data query results aiming at the data query requests in the block chain are stored in the cache region, if the query requests of the same data are obtained again, the data can be directly searched in the cache region without traversing the data stored in the block chain, so that the query workload is reduced, and the data query efficiency is improved.
In another embodiment of the present application, another data access method is introduced, and referring to fig. 2, the method may include:
and step S21, acquiring a query request of the user for the data in the block chain as a target query request.
Step S21 is the same as step S11 in the previous embodiment, and the detailed process of step S21 can be referred to the related description of step S11, which is not repeated herein.
And step S22, obtaining the key information in the target query request.
The key information may include, but is not limited to: one or more of a blockhead hash value, a transaction hash value, a contract address, a contract method, and a contract parameter of the blockchain data.
And step S23, carrying out hash operation on the key information, wherein the operation result is used as a target key word.
And step S24, inquiring whether a key value pair matching the target keyword exists in a preset cache region.
The key value pairs stored in the cache region are the key value pairs of the hash value, so that the query efficiency can be improved, and the storage space can be saved.
If yes, indicating that data corresponding to the target query request exists in the cache area, executing step S25; if not, go to step S26.
Steps S22-S24 are a specific implementation of step S12 in the previous embodiment.
Step S25, obtaining a key value pair matching the target keyword from the cache region, taking a value in the key value pair as data corresponding to the target query request, and returning the data corresponding to the target query request to the user.
Accordingly, step S25 is a specific implementation manner of step S13 in the foregoing embodiment.
Step S26, searching whether data corresponding to the target query request exists in the block chain.
If so, go to step S27.
Steps S26-S27 are the same as steps S14-S15 in the previous embodiment, and the detailed procedures of steps S26-S27 can be referred to the related descriptions of steps S14-S15, and are not described herein again.
In another embodiment of the present application, another data access method is introduced, and referring to fig. 3, the method may include:
and step S31, acquiring a query request of the user for the data in the block chain as a target query request.
Step S32, searching whether data corresponding to the target query request exists in a preset cache region.
If yes, go to step S33; if not, go to step S34.
Step S33, obtaining data corresponding to the target query request from the cache area, and returning the data corresponding to the target query request to the user.
Step S34, searching whether data corresponding to the target query request exists in the block chain.
If so, go to step S35.
Step S35, obtaining data corresponding to the target query request from the block chain point, and returning the data corresponding to the target query request to the user.
Steps S31-S35 are the same as steps S11-S15 in the previous embodiment, and the detailed procedures of steps S31-S35 can be referred to the related descriptions of steps S11-S15, and are not described herein again.
And step S36, storing the data corresponding to the target query request in the cache area.
In this embodiment, the data corresponding to the target query request is stored in the cache region, which can ensure that the data can be queried from the cache region when the same data is queried next time, and the data does not need to be queried in the block chain again, thereby reducing the access pressure of the block chain and improving the query efficiency.
In another embodiment of the present application, referring to fig. 4, the storing the data corresponding to the target query request in the cache region may include:
and step S41, obtaining the key information in the target query request.
The key information may include, but is not limited to: one or more of a blockhead hash value, a transaction hash value, a contract address, a contract method, and a contract parameter of the blockchain data.
And step S42, carrying out hash operation on the key information, wherein the operation result is used as a key word.
And carrying out Hash operation on the key information, wherein the operation result is used as a key word, so that the storage space of a cache region can be saved.
Step S43, taking the data corresponding to the target query request as a value, and storing a key-value pair composed of the key and the value in the cache area.
And the data corresponding to the target query request is used as a value, and a key value pair consisting of the key word and the value is stored in the cache region, so that the storage space of the cache region can be saved, and the query efficiency can be improved by using the matching hash value when the data query request is responded.
In another embodiment of the present application, another data access method is introduced, and referring to fig. 5, the method may include:
and step S51, acquiring a query request of the user for the data in the block chain as a target query request.
Step S52, searching whether data corresponding to the target query request exists in a preset cache region.
If yes, go to step S53; if not, go to step S54.
Step S53, obtaining data corresponding to the target query request from the cache area, and returning the data corresponding to the target query request to the user.
Step S54, searching whether data corresponding to the target query request exists in the block chain.
If so, go to step S55.
Step S55, obtaining data corresponding to the target query request from the block chain, and returning the data corresponding to the target query request to the user.
And step S56, storing the data corresponding to the target query request in the cache area.
Steps S51-S56 are the same as steps S31-S36 in the previous embodiment, and the detailed procedures of steps S51-S56 can be referred to the related descriptions of steps S31-S36, and are not described herein again.
Step S57, storing the mapping relationship between the data corresponding to the target query request and the location information of the data in the block chain in the cache area.
The mapping relation between the data corresponding to the target query request and the position information of the data corresponding to the target query request in the block chain is stored in the cache region, so that if part of data in the cache region is lost, the same data cannot be queried in the cache region, the position of the data in the block chain can be quickly located according to the mapping relation, the data can be continuously queried at the located position, and the efficiency of data query is improved.
Next, a data access device provided in the present application will be described, and the data access device described below and the data access method described above may be referred to correspondingly.
Referring to fig. 6, the data access device includes: the device comprises a first obtaining module 11, a first searching module 12, a second obtaining module 13, a second searching module 14 and a third obtaining module 15.
The first obtaining module 11 is configured to obtain a query request of a user for data in a blockchain as a target query request.
The first searching module 12 is configured to search whether data corresponding to the target query request exists in a preset cache region, if so, execute the second obtaining module 13, and if not, execute the second searching module 14.
The second obtaining module 13 is configured to obtain data corresponding to the target query request from the cache region, and return the data corresponding to the target query request to the user.
The second searching module 14 is configured to search whether data corresponding to the target query request exists in the block chain, and if so, execute a third obtaining module 15.
The third obtaining module 15 is configured to obtain data corresponding to the target query request from the blockchain, and return the data corresponding to the target query request to the user.
In this embodiment, the first searching module 12 may include:
the first obtaining sub-module is used for obtaining key information in the target query request;
the first determining submodule is used for carrying out Hash operation on the key information, and the operation result is used as a target keyword;
the first query submodule is used for querying whether a key value pair matched with the target key word exists in the cache region, and if so, the second acquisition submodule in the second acquisition module is executed;
and the second obtaining submodule is used for obtaining a key value pair matched with the target keyword from the cache region, and taking the value in the key value pair as data corresponding to the target query request.
In this embodiment, the data access apparatus may further include:
and the first storage module is used for storing the data corresponding to the target query request in the cache region.
In this embodiment, the first storage module may include:
the third obtaining sub-module is used for obtaining key information in the target query request;
the second determining submodule is used for carrying out Hash operation on the key information, and the operation result is used as a key word;
and the storage sub-module is used for taking the data corresponding to the target query request as a value and storing a key value pair consisting of the key word and the value in the cache region.
In this embodiment, the data access apparatus may further include:
and the second storage module is used for storing the mapping relation between the data corresponding to the target query request and the position information of the data in the block chain in the cache region.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. For the device-like embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
Finally, it should also be 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.
For convenience of description, the above devices are described as being divided into various units by function, and are described separately. Of course, the functionality of the units may be implemented in one or more software and/or hardware when implementing the present application.
From the above description of the embodiments, it is clear to those skilled in the art that the present application can be implemented by software plus necessary general hardware platform. Based on such understanding, the technical solutions of the present application may be essentially or partially implemented in the form of a software product, which may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments of the present application.
The data access method and apparatus provided by the present application are introduced in detail above, and a specific example is applied in the present application to explain the principle and the implementation of the present application, and the description of the above embodiment is only used to help understand the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A method of data access, comprising:
acquiring a query request of a user for data in a block chain as a target query request;
searching whether data corresponding to the target query request exists in a preset cache region;
if so, acquiring data corresponding to the target query request from the cache region, and returning the data corresponding to the target query request to the user;
if not, searching whether data corresponding to the target query request exists in the block chain;
and if so, acquiring data corresponding to the target query request from the block chain, and returning the data corresponding to the target query request to the user.
2. The method of claim 1, wherein the searching for whether data corresponding to the target query request exists in a preset cache region comprises:
acquiring key information in the target query request;
performing Hash operation on the key information, wherein the operation result is used as a target keyword;
inquiring whether a key value pair matched with the target keyword exists in the cache region;
if yes, the obtaining data corresponding to the target query request from the cache region includes:
and obtaining a key value pair matched with the target keyword from the cache region, and taking the value in the key value pair as data corresponding to the target query request.
3. The method of claim 1, after obtaining the data corresponding to the target query request from the blockchain, further comprising:
storing data corresponding to the target query request in the cache region.
4. The method of claim 3, wherein storing data corresponding to the target query request in the cache region comprises:
acquiring key information in the target query request;
performing Hash operation on the key information, wherein the operation result is used as a key word;
and taking the data corresponding to the target query request as a value, and storing a key value pair consisting of the key word and the value in the cache region.
5. The method of claim 3, further comprising:
and storing the mapping relation between the data corresponding to the target query request and the position information of the data in the block chain in the cache region.
6. A data access device, comprising:
the first acquisition module is used for acquiring a query request of a user for data in a block chain as a target query request;
the first searching module is used for searching whether data corresponding to the target query request exists in a preset cache region, if so, the second obtaining module is executed, and if not, the second searching module is executed;
the second obtaining module is configured to obtain data corresponding to the target query request from the cache region, and return the data corresponding to the target query request to the user;
the second searching module is configured to search whether data corresponding to the target query request exists in the block chain, and if so, execute a third obtaining module;
the third obtaining module is configured to obtain data corresponding to the target query request from the block chain, and return the data corresponding to the target query request to the user.
7. The apparatus of claim 6, wherein the first lookup module comprises:
the first obtaining sub-module is used for obtaining key information in the target query request;
the first determining submodule is used for carrying out Hash operation on the key information, and the operation result is used as a target keyword;
the first query submodule is used for querying whether a key value pair matched with the target key word exists in the cache region, and if so, the second acquisition submodule in the second acquisition module is executed;
and the second obtaining submodule is used for obtaining a key value pair matched with the target keyword from the cache region, and taking the value in the key value pair as data corresponding to the target query request.
8. The apparatus of claim 6, further comprising:
and the first storage module is used for storing the data corresponding to the target query request in the cache region.
9. The apparatus of claim 8, wherein the first storage module comprises:
the third obtaining sub-module is used for obtaining key information in the target query request;
the second determining submodule is used for carrying out Hash operation on the key information, and the operation result is used as a key word;
and the storage sub-module is used for taking the data corresponding to the target query request as a value and storing a key value pair consisting of the key word and the value in the cache region.
10. The apparatus of claim 9, further comprising:
and the second storage module is used for storing the mapping relation between the data corresponding to the target query request and the position information of the data in the block chain in the cache region.
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| CN114625767A (en) * | 2020-11-10 | 2022-06-14 | 支付宝(杭州)信息技术有限公司 | Data query method, device, equipment and readable medium |
| CN112818014A (en) * | 2020-12-31 | 2021-05-18 | 杭州趣链科技有限公司 | Block chain data analysis method and device and electronic equipment |
| CN112818014B (en) * | 2020-12-31 | 2022-07-26 | 杭州趣链科技有限公司 | Block chain data analysis method and device and electronic equipment |
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