CN112256715A - Index updating method and device, electronic equipment and storage medium - Google Patents
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Abstract
The application provides an index updating method, an index updating device, electronic equipment and a storage medium, wherein the method comprises the following steps: monitoring whether the data stored in the database is updated; if the update happens, an index document corresponding to the database is constructed; calculating the information abstract value of the index document and generating the version number of the index document; comparing the information abstract value of the index document with the information abstract value of the local historical index, and comparing the version number of the index document with the version number of the local historical index; and if the information abstract value of the index document is different from the information abstract value of the local historical index and the version number of the index document is greater than or equal to the version number of the local historical index, updating the local historical index by using the index document. The method solves the problem of repeated updating of the index of the search engine.
Description
Technical Field
The invention relates to the field of search engine indexes, in particular to an index updating method, an index updating device, electronic equipment and a storage medium.
Background
Data which can be provided by a search engine does not exist independently, but generally depends on an external database, the search engine indexes the data of the external database and stores the data in the external database locally so as to accelerate query, the external database is equivalent to one computer, a search engine service is deployed in another computer, the search engine service needs to monitor the change of the data in the database so as to update a local index, and then a user can query the latest data through the search engine service.
However, in the prior art, in order to avoid data loss, a batch of data is repeatedly read, but the data is repeatedly updated for a search engine. And index updates must be made in chronological order if intermediate order changes would result in the new index being overwritten by the old index. For example, the incremental monitoring is 5 seconds, the previous index of 5 seconds has not been submitted, the next index update of 5 seconds has been completed, and the current index of 5 seconds is submitted, which results in the index being overwritten with the previous index of 5 seconds, and this continues until the next data update.
Disclosure of Invention
The embodiment of the application provides an updating method of a search engine index, which solves the problem of repeated index updating.
The embodiment of the application provides a method for updating a search engine index, which comprises the following steps:
monitoring whether the data stored in the database is updated;
if the updating happens, constructing an index document corresponding to the database;
calculating the information abstract value of the index document and generating the version number of the index document;
comparing the information abstract value of the index document with the information abstract value of the local historical index, and comparing the version number of the index document with the version number of the local historical index;
and if the information abstract value of the index document is different from the information abstract value of the local historical index, and the version number of the index document is greater than or equal to the version number of the local historical index, updating the local historical index by using the index document.
In one embodiment, the data field of the database contains a modification time; whether the data stored in the monitoring database is updated or not comprises the following steps:
and inquiring whether a data field of the modification time in the preset time period exists or not every other preset time period, and if so, determining that the data of the database is updated.
In one embodiment, the method further comprises:
for the data field of which the modification time is before the specified time interval, not participating in the judgment of whether the database is updated; the specified time interval is greater than the preset time period.
In one embodiment, the monitoring whether the data stored in the database is updated includes:
monitoring a database update log in a message queue, and determining that the data of the database is updated when a new database update log is stored in the message queue.
In one embodiment, the monitoring whether the data stored in the database is updated includes:
deleting the database update log in the message queue created at a time prior to the specified time interval.
In an embodiment, if the update occurs, constructing the index document corresponding to the database includes:
and constructing an index document by using the preset interesting fields in the database.
In one embodiment, generating the version number of the index document includes:
and generating the version number of the index document according to the modification time of the data table in which the preset interested field is positioned in the database.
An embodiment of the present application further provides an apparatus for updating a search engine index, including:
the monitoring module is used for monitoring whether the data stored in the database is updated or not;
the calculation module is used for calculating the information abstract value of the index document and generating the version number of the index document;
the judging module is used for comparing the information abstract value of the index document with the information abstract value of the local historical index and comparing the version number of the index document with the version number of the local historical index;
and the updating module is used for updating the local historical index by using the index document when the information abstract value of the index document is different from the information abstract value of the local historical index and the version number of the index document is greater than or equal to the version number of the local historical index.
An embodiment of the present application further provides an electronic device, where the electronic device includes:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to execute the method for updating the search engine index.
The embodiment of the application also provides a computer readable storage medium, wherein the storage medium stores a computer program, and the computer program can be executed by a processor to complete the updating method of the search engine index.
According to the technical scheme provided by the embodiment of the application, whether the data stored in the database is updated or not can be monitored, and if the data stored in the database is updated, the index document corresponding to the database is constructed. Calculating the information abstract value of the index document, generating a version number of the index document, comparing the information abstract value of the index document with the information abstract value of the local historical index, comparing the version number of the index document with the version number of the local historical index, and updating the local historical index by using the index document if the information abstract value of the index document is different from the information abstract value of the local historical index and the version number of the index document is greater than or equal to the version number of the local historical index. The method solves the problem of repeated updating of the index of the search engine.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic view of an application scenario of an index updating method according to an embodiment of the present application;
fig. 2 is a schematic flowchart illustrating an index updating method according to an embodiment of the present application;
FIG. 3 is a detailed flowchart illustrating an index updating method according to an embodiment of the present disclosure;
fig. 4 is a block diagram of an index updating apparatus according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
Fig. 1 is a schematic view of an application scenario of an index updating method according to an embodiment of the present application. As shown in fig. 1, the application scenario includes a server 110 and a client 120, where the server 110 may have a database, the client 120 may obtain data from the database of the server 110 according to a locally stored index document, and the client 120 may have a search engine installed therein, so as to facilitate querying data from the server 110.
In an embodiment, the client 120 may monitor whether data stored in the database in the server 110 is updated, if the data is updated, reconstruct an index document corresponding to the database, calculate an information digest value of the index document, generate a version number of the index document, compare the information digest value of the index document with an information digest value of a local history index, compare the version number of the index document with the version number of the local history index, and update the local history index using the index document if the information digest value of the index document is different from the information digest value of the local history index and the version number of the index document is greater than or equal to the version number of the local history index.
The embodiment of the application also provides the electronic equipment. The electronic device may be the client 120 shown in fig. 1. As shown in fig. 1, client 120 includes a processor 101, a memory 102 for storing instructions executable by processor 101; wherein the processor 101 is configured to execute the index updating method provided by the present application.
The Memory 102 may be implemented by any type of volatile or nonvolatile Memory device or combination thereof, such as a Static Random Access Memory (SRAM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), an Erasable Programmable Read-Only Memory (EPROM), a Programmable Read-Only Memory (PROM), a Read-Only Memory (ROM), a magnetic Memory, a flash Memory, a magnetic disk, or an optical disk.
The present application further provides a computer-readable storage medium, where a computer program is stored, and the computer program can be executed by the processor 101 to complete the method for updating an index provided in the embodiments of the present application.
Fig. 2 is a flowchart illustrating an index updating method according to an embodiment of the present application. As shown in fig. 2, the method comprises the following steps S210-S250.
Step S210: and monitoring whether the data stored in the database is updated.
The database is a warehouse for organizing, storing and managing data according to a data structure, and is an organized, sharable and uniformly managed collection of a large amount of data which is stored in a computer for a long time. The database is a data set which is stored together in a certain mode, can be shared by a plurality of users, has the redundancy as small as possible, is independent from an application program, can be regarded as an electronic file cabinet, namely a place for storing electronic files, and can be used for adding, inquiring, updating, deleting and the like of data in the files. The existence of new, deleted or modified data stored in the database means that the update occurs.
In one embodiment, the data field of the database contains a modification time; when the data field changes, the modification time is updated. In the step S210, whether the data stored in the database is updated may be monitored in an incremental monitoring mode, specifically by: and inquiring whether a data field of the modification time in the preset time period exists or not every other preset time period, and if so, determining that the data of the database is updated.
For example, the search engine of the client may query the data that is changed from the current time T to the past time T every unit time T, take the unique id of the data, and then back-check the database according to the unique id of the data to construct the index.
Wherein, the data field with the modification time before the specified time interval does not participate in the judgment of whether the database is updated; the specified time interval is greater than the preset time period.
For example, the unit time t may be 5 seconds, the specified time interval may be 1 minute, data changed within the 5 seconds is acquired every 5 seconds, and if not, it is considered that no data update has occurred. For data with modification time exceeding 1 minute, the judgment may not be involved. Thereby reducing unnecessary updates in abnormal situations.
In other embodiments, the step S210 may monitor whether the data stored in the database is updated, and may adopt a message queue-based manner, specifically by: monitoring a database update log in a message queue, and determining that the data of the database is updated when a new database update log is stored in the message queue.
A "message queue" is a container that holds messages during their transmission. The message queue manager acts as a man-in-the-middle in relaying a message from its source to its destination. The main purpose of the queues is to provide routing and guarantee delivery of messages; if the recipient is not available when the message is sent, the message queue will hold the message until it can be successfully delivered. The update log of the database can be pushed to a message queue as a message for storage, so that a search engine of a client can monitor the message in the message queue, the database is considered to be updated once the message comes in, the unique id of the data is recorded, and the database is rechecked to assemble the index document according to the unique id of the data.
In one embodiment, a database update log in the message queue created at a time prior to a specified time interval may be deleted. For example, the specified time interval may be 1 minute, and the database update log is deleted 1 minute before in the message queue. Thereby reducing unnecessary updates in abnormal situations.
Step S220: and if the data stored in the database is updated, constructing an index document corresponding to the database.
The search engine is a retrieval technology that retrieves specified information from the internet by using a specific strategy and feeds the information back to a user according to user requirements and a certain algorithm. And the index refers to the data documents stored by the search engine. The index can be regarded as a directory, and the query efficiency can be improved through the index.
In an embodiment, if data stored in a database is updated, constructing an index document corresponding to the database includes: and constructing an index document by using the preset interesting fields in the database.
Wherein the documents in the search engine are not necessarily completely consistent with the fields in the database, such as: the method comprises the steps that a, b, c and d fields are stored in a database, modification time can be updated when any one field is updated, a search engine only needs the a field and the b field, the c and the d are irrelevant to change, and whether the current changed field is concerned by the search engine cannot be known through increment monitoring or message queue monitoring, so that the field concerned by the search engine is set as a preset field of interest in the database, and an index document is constructed by the preset field of interest in the database. Namely, the index document corresponds to a preset interesting field in a database.
Step S230: and calculating the information abstract value of the index document and generating the version number of the index document.
The digest value of the information of the index document, that is, the unique check value of the index document, may be a character string composed of letters and numbers, and in one embodiment, the digest value of the information may be an MD5 value.
For an index document, a method for quickly judging whether the contents of the index document are consistent is used, namely calculating the MD5 of the index document and then comparing whether the values of the MD5 are consistent. Since most data is a key value and a mapping set of values, the following is similar: { "a": 1, "b": 3 };
the values, namely 1 and 3, are sorted and then converted into character strings, and the MD5 of the character string is calculated to be the MD5 value of the document according to the character strings, and is assumed to be abc123, so that { "a": 1, "b": 3, "MD 5": abc123 "}. It should be specially noted that, if the corresponding value is an array type, the arrays need to be sorted as well.
In one embodiment, generating a version number of the index document may include: and generating the version number of the index document according to the modification time of the data table in which the preset interested field is positioned in the database.
That is, the version number of the index document may be represented by a modification time. The modification time is early to be considered as the old version, and the modification time is late to be considered as the old version. The version number may be the number 1,2,3 …, as needed, indicating that the version number of the first generated index document is small and the version number of the second generated index document is large.
The version number of the index document may use the modification time of the database main table corresponding to the index document. For example, the index document may use the timestamp of the modification time of the database table in which the a and b fields are located, resulting in { "a": 1, "b": 3, "md 5": abc123, "version": 1234567 }. I.e., fields a, b, MD5 value "abc 123" and version number "1234567".
Step S240: and comparing the information abstract value of the index document with the information abstract value of the local historical index, and comparing the version number of the index document with the version number of the local historical index.
Wherein the local history index can be regarded as an old index document existing locally. For example, the MD5 value of the index document is compared with the MD5 value of the local history index to determine whether the values are consistent. And comparing the version number of the index document with the version number of the local historical index to judge whether the version number of the index document is greater than the version number of the local historical index or not.
Step S250: and if the information abstract value of the index document is different from the information abstract value of the local historical index, and the version number of the index document is greater than or equal to the version number of the local historical index, updating the local historical index by using the index document.
The different values of the information abstracts and the larger version number indicate that the index really needs to be updated, so that the local history index is replaced by the newly generated index document.
Whether the MD5 is the same or not is judged, whether the updated document is changed or not can be determined, and a plurality of repeated updating operations can be filtered; and judging whether the version number is increased or not, so that the updating order can be ensured, and the version number is updated strictly according to the increasing, thereby ensuring that the new index document is not covered by the old document. The efficiency of the traditional index updating operation can be improved by more than 50% through md5 limitation and version number limitation.
Fig. 3 is a schematic detailed flowchart of an index updating method according to an embodiment of the present disclosure. As shown in fig. 3, steps S310-S370 are included.
Step S310: monitoring whether the database is updated or not in an increment monitoring or real-time monitoring mode based on the message queue;
step S320: if the database is updated, executing step S330, and if the database is not updated, returning to step S310 for the next round of monitoring;
step S330: constructing an index document;
step S340: generating an information abstract value and a version number of the index document;
step S350: it is determined whether the version number of the index document is greater than the local history index and the MD5 value of the index document is not equal to the MD5 value of the local history index. If yes, go to step S360, if no, go to step S370 to abandon updating the index.
Step S360: the local history index is updated with the index documents.
Fig. 4 is a block diagram illustrating an index updating apparatus according to an embodiment of the present disclosure. As shown in fig. 4, the apparatus includes: a monitoring module 410, a calculating module 420, a judging module 430 and an updating module 440.
The monitoring module 410 is used for monitoring whether the data stored in the database is updated;
a calculating module 420, configured to calculate an information digest value of the index document and generate a version number of the index document;
the judging module 430 is configured to compare the information digest value of the index document with the information digest value of the local history index, and compare the version number of the index document with the version number of the local history index;
an updating module 440, configured to update the local history index with the index document when the information digest value of the index document is different from the information digest value of the local history index, and the version number of the index document is greater than or equal to the version number of the local history index.
The implementation process of the function and the action of each module in the above device is specifically described in the implementation process of the corresponding step in the above index updating method, and is not described herein again.
In the embodiments provided in the present application, the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Furthermore, the functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
It should be noted that the functions, if implemented in the form of software functional modules and sold or used as independent products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. An index updating method, comprising:
monitoring whether the data stored in the database is updated;
if the updating happens, constructing an index document corresponding to the database;
calculating the information abstract value of the index document and generating the version number of the index document;
comparing the information abstract value of the index document with the information abstract value of the local historical index, and comparing the version number of the index document with the version number of the local historical index;
and if the information abstract value of the index document is different from the information abstract value of the local historical index, and the version number of the index document is greater than or equal to the version number of the local historical index, updating the local historical index by using the index document.
2. The method of claim 1, wherein the data field of the database contains a modification time; whether the data stored in the monitoring database is updated or not comprises the following steps:
and inquiring whether a data field of the modification time in the preset time period exists or not every other preset time period, and if so, determining that the data of the database is updated.
3. The method of claim 1, further comprising:
for the data field of which the modification time is before the specified time interval, not participating in the judgment of whether the database is updated; the specified time interval is greater than the preset time period.
4. The method of claim 1, wherein monitoring whether the data stored in the database is updated comprises:
monitoring a database update log in a message queue, and determining that the data of the database is updated when a new database update log is stored in the message queue.
5. The method of claim 4, wherein monitoring whether the data stored in the database is updated comprises:
deleting the database update log in the message queue created at a time prior to the specified time interval.
6. The method of claim 1, wherein the constructing the index document corresponding to the database if the update occurs comprises:
and constructing an index document by using the preset interesting fields in the database.
7. The method of claim 6, wherein generating a version number for the index document comprises:
and generating the version number of the index document according to the modification time of the data table in which the preset interested field is positioned in the database.
8. An apparatus for updating an index, comprising:
the monitoring module is used for monitoring whether the data stored in the database is updated or not;
the calculation module is used for calculating the information abstract value of the index document and generating the version number of the index document;
the judging module is used for comparing the information abstract value of the index document with the information abstract value of the local historical index and comparing the version number of the index document with the version number of the local historical index;
and the updating module is used for updating the local historical index by using the index document when the information abstract value of the index document is different from the information abstract value of the local historical index and the version number of the index document is greater than or equal to the version number of the local historical index.
9. An electronic device, characterized in that the electronic device comprises:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to perform the index update method of any one of claims 1-7.
10. A computer-readable storage medium, characterized in that the storage medium stores a computer program executable by a processor to perform the method of updating an index according to any one of claims 1 to 7.
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| CN113157716A (en) * | 2021-05-13 | 2021-07-23 | 杭州网易云音乐科技有限公司 | Data processing method, device, equipment and medium |
| CN113434509A (en) * | 2021-07-02 | 2021-09-24 | 挂号网（杭州）科技有限公司 | Updating method and device of incremental index, storage medium and electronic equipment |
| CN113553488A (en) * | 2021-07-15 | 2021-10-26 | 挂号网（杭州）科技有限公司 | Method and device for updating index data in search engine, electronic equipment and medium |
| CN114138795A (en) * | 2021-12-08 | 2022-03-04 | 兴业银行股份有限公司 | Index dynamic updating method and system for thread safety |
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