CN103714144A - Device and method for information retrieval - Google Patents
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- CN103714144A CN103714144A CN201310729264.6A CN201310729264A CN103714144A CN 103714144 A CN103714144 A CN 103714144A CN 201310729264 A CN201310729264 A CN 201310729264A CN 103714144 A CN103714144 A CN 103714144A
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- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
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Abstract
The invention provides a device and method for information retrieval. The device and method are applied to information retrieval servers. The information retrieval servers interact with subject index servers and provide information retrieval services for a user. The method comprises the steps that an information retrieval request of the user is analyzed, so that a document subject contained in the information retrieval request is obtained and the subject index server corresponding to the document subject is searched for in preset retrieval table items; according to a searching result, the information retrieval request is forwarded to the subject index server corresponding to the document subject; retrieval results returned by the subject index server are received, collected and ranked so that a retrieval result list checked by the user can be generated. According to the device and method for information retrieval, subjects of information documents are divided, the information documents with different subjects are maintained through the subject index servers, and therefore the efficiency and the quality of information retrieval are improved.
Description
Technical field
The present invention relates to areas of information technology, relate in particular to a kind of information indexing device and method.
Background technology
Information retrieval (Information Retrieval) refers to that information organizes according to certain mode, and according to information user's needs, finds out process and the technology of relevant information.The information retrieval full name of broad sense is informationm storage and retrieval, refers to information is organized and stored according to certain mode, and need to from information aggregate, find out the needed process for information about of user according to user.
The main evaluation index of information retrieval comprises following two aspects:
1. retrieval quality: comprise precision ratio and recall ratio.For user's inquiry, should be able to retrieve and accurately meet the result of search request and retrieve as far as possible maximum results.
2. recall precision: the result that processes user queries request and feedback searching are arrived as quickly as possible.Main evaluation index is response time and handling capacity, to submit to one query request to obtaining the inquiry number of processing time that result experiences and p.s. from user.
In the process of information retrieval, how to promote the important directions that retrieval quality and recall precision are current developer's technology explorations of the same trade or business.
Summary of the invention
In view of this, the invention provides a kind of information indexing device and method.By the present invention, can effectively improve retrieval quality and recall precision.
Particularly, the present invention is achieved through the following technical solutions:
An information indexing device, is applied on information retrieval server, described information retrieval server and subject index server interaction, and for user provides information retrieval service, this device comprises:
Request analysis unit, for resolving user's information retrieval requests, obtains the document subject matter that described information retrieval requests comprises, and in default index list item, searches subject index server corresponding to described document subject matter;
Request retransmission unit, for according to lookup result, is transmitted to subject index server corresponding to described document subject matter by described information retrieval requests;
Receive and arrange unit, the result for retrieval returning for receiving subject index server, and the result for retrieval list that described result for retrieval is gathered and sorts and check for user to generate.
Further, described reception arranges unit, if for not receiving the result for retrieval that subject index server corresponding to document subject matter returns within the predetermined time, notice request resolution unit is searched backup subject index server corresponding to described document subject matter in described default index list item;
Described request retransmission unit, is further used for described information retrieval requests to be transmitted to backup subject index server corresponding to described document subject matter.
Further, described request retransmission unit, for when described information retrieval requests does not comprise any document subject matter, is transmitted to all subject index servers by described information retrieval requests.
Further, described device also comprises:
Information cache unit, for the result for retrieval returning at local cache subject index server according to predetermined cache policy.
Further, described document subject matter comprises: one or more in facility information, local file and relevant database.
An information retrieval method, is applied on information retrieval server, described information retrieval server and subject index server interaction, and for user provides information retrieval service, the method comprises:
Resolve user's information retrieval requests, obtain the document subject matter that described information retrieval requests comprises, and in default index list item, search subject index server corresponding to described document subject matter;
According to lookup result, described information retrieval requests is transmitted to subject index server corresponding to described document subject matter;
Receive the result for retrieval that subject index server returns, and the result for retrieval list that described result for retrieval is gathered and sorts and check for user to generate.
Further, described method also comprises:
If do not receive within the predetermined time the result for retrieval that subject index server corresponding to document subject matter returns, in described default index list item, search backup subject index server corresponding to described document subject matter;
Described information retrieval requests is transmitted to backup subject index server corresponding to described document subject matter.
Further, described method also comprises:
When described information retrieval requests does not comprise any document subject matter, described information retrieval requests is transmitted to all subject index servers.
Further, described method also comprises:
The result for retrieval returning at local cache subject index server according to predetermined cache policy.
Further, described document subject matter comprises: one or more in facility information, local file and relevant database.
By above description, can be found out, the present invention is by carrying out extraction and the definition of information document theme to the information resources of multi-service in network management system, isomery, information document is carried out to theme division simultaneously, and by a plurality of subject index servers, the information document under different themes is safeguarded, and then improve efficiency and the quality of information retrieval.
Accompanying drawing explanation
Fig. 1 is the network architecture schematic diagram that information retrieval service is typically provided;
Fig. 2 is the network architecture schematic diagram of information retrieval in the exemplary a kind of embodiment of the present invention;
Fig. 3 is the building-block of logic of information indexing device in the exemplary a kind of embodiment of the present invention;
Fig. 4 is the schematic flow sheet of information retrieval method in the exemplary a kind of embodiment of the present invention.
Embodiment
Information resources involved during information retrieval have many types; take network management system as example; conventionally can relate to such as relevant database, local file, network equipment MIB(Management Information Base; management information bank) etc.; and primary information retrieval may be searched data from a plurality of information resources; thereby current used typical information retrieval service Organization Chart can, with reference to figure 1, comprise: information retrieval server and index server.Wherein, index server is to the abstract information document that is extracted as text formatting of the information resources of searched targets, and information document is extracted and analyzed, and generates and stores the mapping relations of index and the information document that comprises this index.Information retrieval server is for receiving user's retrieval request, and carry out alternately with described index server, user's retrieval request is transmitted to index server, at index server, resolve and carry out after above-mentioned retrieval request, the result for retrieval that information retrieval server returns to index server feeds back to user.
Yet there are in realization some problems that are difficult to avoid in such scheme.For example: first practical problems that this scheme faces is that document index and the search function on index server exists contention for resources.Still take network management system as example, and its business datum source more complicated, relates to the Heterogeneous Information carriers such as relevant database, local file, network equipment MIB.Meanwhile, even identical information carrier, under different service application, its format information memory also may be different.Such as, be designed to the database table of different structure and field, different file data form, MIB table and field etc.In same index server, there is the contention to various index server local resources such as CPU, internal memory, magnetic disc i/o, process handle, the network bandwidths in the function of the obtaining of information document, index function and the request of execution user search.
In addition, the retrieval response time delay of such scheme under extensive document capacity is long.Because all information documents all concentrate in same index server, carry out index and maintenance, when information document is more, if information document changes, the index file in the time of just need to carrying out index upgrade and retrieval to whole index files loads.The performance bottleneck that this often becomes in retrieving, causes the response of information retrieval slow.
Finally, such implementation handling capacity when processing concurrence retrieval request is low.Owing to being index and retrieval at the enterprising style of writing shelves of same index server, the process of the information document collection of a plurality of classs of business, analysis, generating indexes and when concurrent retrieval request processing procedure there is local resource contention, the retrieval request quantity of processing in unit interval is lower, affects user and experiences.
In view of this, please refer to Fig. 2, the invention provides a kind of information indexing device and method, for the information resources of multi-service, isomery, carry out extraction and the definition of information document theme, and according to theme, information document sorted out and divided.According to the rising tendency of information document capacity under different themes, by the information document under a document subject matter or a plurality of document subject matter, by a subject index server, provide index and retrieval service again.That is to say, the present invention is provided with a plurality of subject index servers, and each subject index server obtains and analyzes information document corresponding to one or more document subject matter, the mapping relations of the information document that generates and stores index and comprise this index.
The obtaining of the original information document that need to carry out in same index server, index function and execution user's retrieval request function is shared execution by a plurality of subject index servers now, low to the relatively former scheme of competition of the various local resources such as CPU, internal memory, magnetic disc i/o, process handle, the network bandwidth on single subject index server.When user asks to retrieve, by the parallel processing of a plurality of subject index server, be no longer subject to the limitation of single index server processing power, thereby can respond rapidly retrieval request, and then improve the service rate of information retrieval server, promote user and experience.Further, a plurality of subject index servers are set, each subject index server only need to obtain, analyzes and upgrade the Topic relative document of each auto correlation to server index, has avoided relating to the problems such as response that the centralized maintenance of whole document index causes is slow.Meanwhile, can plan and adjust according to the rising tendency of different themes Documents capacity the rule of correspondence of different themes and subject index server.Such as, expand subject index server, to realize subject index servo load balance.
With software, be embodied as example below, describe specific implementation of the present invention in detail.Information indexing device provided by the invention, it operates on information retrieval server.As the operation carrier of apparatus of the present invention, described information retrieval server at least includes CPU, internal memory and nonvolatile memory conventionally, certainly also may comprise the hardware such as various forwarding chips and I/O interface.Described information retrieval server and subject index server interaction, for user provides information retrieval service.Please refer to Fig. 3 and Fig. 4, described device includes: request analysis unit, request retransmission unit, reception arrange unit.In an exemplary embodiment, this device is carried out following steps in operational process:
Step 101, request analysis unit resolves user's information retrieval requests, obtains the document subject matter that described information retrieval requests comprises, and in default index list item, searches subject index server corresponding to described document subject matter.
Step 102, request retransmission unit, according to lookup result, is transmitted to subject index server corresponding to described document subject matter by described information retrieval requests.
Step 103, receives and arranges the result for retrieval that unit reception subject index server returns, and the result for retrieval list that described result for retrieval is gathered and sorts and check for user to generate.
For realizing the object of the invention, before carrying out above-mentioned steps, managerial personnel or developer need in advance information resources to be carried out to subject classification, and according to the rising tendency of information document capacity under different themes, under planning and formulation different themes, information document correspondence is carried out the subject index rule server of index and retrieval server, to generate default index list item.Take network management system as example, in a kind of exemplary preferred embodiment of the present invention, to needing the every terms of information resource of carrying out information retrieval to analyze in different business application in network management system, the theme of definition document.Described document subject matter comprises: one or more in facility information, local file and relevant database.For example, can specifically be divided into:
Equipment: the information of the network equipment (comprising router, switch etc.).
Interface: the information of interface in single board of network device.
Link: the information of physics or virtual network link.
Trap: the network equipment or network management system send to the alarm information of managerial personnel's informing network situation.
System journal: the network access user information that sends to network management system according to Syslog agreement.
Access user: the network access user information in user management or charging application.
Audit log: the audit information of reaching for service quality in the application such as Analysis on Quality of Service.
The corresponding relation of described index list item Chinese shelves theme and subject index server can arrange with reference to table 1.
| Subject index server | Document subject matter |
| Subject index server 1 | The equipment of network system, interface, link |
| Subject index server 2 | Trap, system journal |
| Subject index server 3 | Access user, audit log |
Table 1
User's the information retrieval requests of take is that " device A and link B " is example, and described request resolution unit, after receiving this information retrieval requests, is resolved, and therefrom obtains document subject matter: equipment and link.In the index list item shown in table 1, searching the subject index server that equipment and link are corresponding is subject index server 1.Then by request retransmission unit, this information retrieval requests is transmitted to subject index server 1.Described information retrieval requests is resolved and carried out to subject index server 1, and result for retrieval device's document A and link document B are fed back to reception arrangement unit.Receive and arrange the result for retrieval list that unit further gathers this result for retrieval and sorts and check for user to generate.
Further, described request retransmission unit, when described information retrieval requests does not comprise any document subject matter, is transmitted to all subject index servers by described information retrieval requests.Such as, user's information retrieval requests is " A and B ", wherein do not comprise any document subject matter, described request retransmission unit is transmitted to respectively subject index server 1, subject index server 2 and subject index server 3 by this information retrieval requests so, to obtain as far as possible more result for retrieval, improve retrieval quality.
In the exemplary preferred implementation of the present invention, can also, according to the high availability actual needs of retrieval service, carry out redundancy and the fault-tolerant retrieval of information document index.Particularly, can in index list item, increase backup subject index server corresponding to document subject matter.By subject index server and backup subject index server cross dimension guard wire, draw under division rule in a plurality of document index, subject index server is inquired about the mode of whole index files of its maintenance and is carried out the redundancy backup of document index and the fault-tolerant processing of system when carrying out inquiry request.Such as, the corresponding relation of described index list item Chinese shelves theme and subject index server and backup subject index server can arrange with reference to table 2.User's the information retrieval requests of take is that " device A and link B " is example, described request retransmission unit is transmitted to subject index server 1 by this information retrieval requests, if described reception arranged unit and do not receive the result for retrieval that subject index server 1 corresponding to document subject matter returns within the default time, such as, subject index server 1 fault or response timeout, it is subject index server 3 that request analysis unit finds backup subject index server corresponding to described document subject matter " equipment and link " in described default index list item (table 2), then by request retransmission unit, this information retrieval requests is forwarded to subject index server 3, to realize the normal response to user search request.
| Subject index server | Document subject matter | Backup subject index server |
| Subject index server 1 | The equipment of network system, interface, link | Subject index server 3 |
| Subject index server 2 | Trap, system journal | Subject index server 1 |
| Subject index server 3 | Access user, audit log | Subject index server 2 |
Table 2
It should be noted that, for the ease of realizing, subject index server is when receiving retrieval request, can retrieve the full detail document of local index, the document subject matter that comprises backup, then described reception result for retrieval all being returned on information retrieval server arranges unit, and gathers and sort by receiving arrangement unit.Such as, user's information retrieval requests is " A and B ", owing to wherein there not being any document subject matter, described request retransmission unit can be transmitted to this request respectively subject index server 1, subject index server 2 and subject index server 3.Subject index server 1,2 and 3 can be at the result for retrieval of this locality all relating to of retrieval " A and B ", due to information document existing backup on other subject index servers that each document subject matter relates to, so reception arrangement unit receives all result for retrieval, it is all two parts.Described reception arranges unit and can gather and the rear result for retrieval list of checking for user that generates of sorting result for retrieval.
Further, on information retrieval server, be also provided with information cache unit, for the result for retrieval returning at local cache subject index server according to predetermined cache policy.Particularly, a buffer area can be set on information retrieval server, by information cache unit by the result for retrieval of receiving recently and comparatively frequently result for retrieval be stored in this buffer area, so that when user asks again, can directly use the result for retrieval of buffer memory, reduce and subject index server mutual, improve and retrieve the response time.Wherein, described predetermined cache policy, can be arranged according to type and the class of business of information resources by managerial personnel or developer.Such as, the retrieval frequency of cache-time, buffer memory digestion time and buffer memory etc. is set.
By above description, can be found out, the present invention carries out theme division to information document, and by a plurality of subject index servers, the information document under different themes is safeguarded, and then improves efficiency and the quality of information retrieval.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, be equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.
Claims (10)
1. an information indexing device, is applied on information retrieval server, and described information retrieval server and subject index server interaction, for user provides information retrieval service, is characterized in that, this device comprises:
Request analysis unit, for resolving user's information retrieval requests, obtains the document subject matter that described information retrieval requests comprises, and in default index list item, searches subject index server corresponding to described document subject matter;
Request retransmission unit, for according to lookup result, is transmitted to subject index server corresponding to described document subject matter by described information retrieval requests;
Receive and arrange unit, the result for retrieval returning for receiving subject index server, and the result for retrieval list that described result for retrieval is gathered and sorts and check for user to generate.
2. device according to claim 1, is characterized in that,
Described reception arranges unit, if be further used for not receiving within the predetermined time the result for retrieval that subject index server corresponding to document subject matter returns, notice request resolution unit is searched backup subject index server corresponding to described document subject matter in described default index list item;
Described request retransmission unit, is further used for described information retrieval requests to be transmitted to backup subject index server corresponding to described document subject matter.
3. device according to claim 1, is characterized in that,
Described request retransmission unit, is further used for when described information retrieval requests does not comprise any document subject matter, and described information retrieval requests is transmitted to all subject index servers.
4. device according to claim 1, is characterized in that, described device also comprises:
Information cache unit, for the result for retrieval returning at local cache subject index server according to predetermined cache policy.
5. device according to claim 1, is characterized in that, described document subject matter comprises: one or more in facility information, local file and relevant database.
6. an information retrieval method, is applied on information retrieval server, and described information retrieval server and subject index server interaction, for user provides information retrieval service, is characterized in that, the method comprises:
Resolve user's information retrieval requests, obtain the document subject matter that described information retrieval requests comprises, and in default index list item, search subject index server corresponding to described document subject matter;
According to lookup result, described information retrieval requests is transmitted to subject index server corresponding to described document subject matter;
Receive the result for retrieval that subject index server returns, and the result for retrieval list that described result for retrieval is gathered and sorts and check for user to generate.
7. method according to claim 6, is characterized in that, described method also comprises:
If do not receive within the predetermined time the result for retrieval that subject index server corresponding to document subject matter returns, in described default index list item, search backup subject index server corresponding to described document subject matter;
Described information retrieval requests is transmitted to backup subject index server corresponding to described document subject matter.
8. method according to claim 6, is characterized in that, described method also comprises:
When described information retrieval requests does not comprise any document subject matter, described information retrieval requests is transmitted to all subject index servers.
9. method according to claim 6, is characterized in that, described method also comprises:
The result for retrieval returning at local cache subject index server according to predetermined cache policy.
10. method according to claim 6, is characterized in that, described document subject matter comprises: one or more in facility information, local file and relevant database.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105045684A (en) * | 2015-07-16 | 2015-11-11 | 北京京东尚科信息技术有限公司 | Method and device for switching and controlling indexes |
| CN105677829A (en) * | 2016-01-04 | 2016-06-15 | 陈华锋 | Retrieving method and system |
| CN107580053A (en) * | 2017-09-08 | 2018-01-12 | 阿里巴巴集团控股有限公司 | Method for exhibiting data, device, client and system |
| CN108595512A (en) * | 2018-03-23 | 2018-09-28 | 华迪计算机集团有限公司 | A kind of information retrieval method and equipment across security domain |
| CN114706946A (en) * | 2022-03-28 | 2022-07-05 | 广州万辉信息科技有限公司 | Trademark category retrieval platform and method |
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| CN100458784C (en) * | 2006-04-06 | 2009-02-04 | 中国科学院计算技术研究所 | Researching system and method used in digital labrary |
| CN101980517A (en) * | 2010-10-25 | 2011-02-23 | 中兴通讯股份有限公司 | Method and system for searching for coloring ring back tone information |
| CN102833352A (en) * | 2012-09-17 | 2012-12-19 | 深圳中兴网信科技有限公司 | Distributed cache management system and method for implementing distributed cache management |
| CN103020300B (en) * | 2012-12-28 | 2017-04-12 | 杭州华三通信技术有限公司 | Method and device for information retrieval |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105045684A (en) * | 2015-07-16 | 2015-11-11 | 北京京东尚科信息技术有限公司 | Method and device for switching and controlling indexes |
| CN105045684B (en) * | 2015-07-16 | 2018-06-15 | 北京京东尚科信息技术有限公司 | Index switching and the method and device of index control |
| CN105677829A (en) * | 2016-01-04 | 2016-06-15 | 陈华锋 | Retrieving method and system |
| CN107580053A (en) * | 2017-09-08 | 2018-01-12 | 阿里巴巴集团控股有限公司 | Method for exhibiting data, device, client and system |
| CN108595512A (en) * | 2018-03-23 | 2018-09-28 | 华迪计算机集团有限公司 | A kind of information retrieval method and equipment across security domain |
| CN114706946A (en) * | 2022-03-28 | 2022-07-05 | 广州万辉信息科技有限公司 | Trademark category retrieval platform and method |
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