JP2008243147A - Client server system, retrieval server, retrieval method, and retrieval program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a client server system supressing a load on a client machine to allow sequential search and index search. <P>SOLUTION: This client server system is provided with a retrieval server 30 having a central processing unit 31 operated by program control, an index processing part 32 for preparing and updating an index, a retrieval updating processing control part 33 having a function for storing a time to update the index, a storage device 34 for recording the index 341 prepared actually, a retrieval processing part 35 for carrying out the retrieval processing, and a retrieval request input part 36 for processing a retrieval request from a user. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a client / server system, a search server, a search method, and a search program in which a client terminal connected via a network acquires data on a data management server.

Conventionally, as described in Patent Document 1 (Japanese Patent Application Laid-Open No. 2004-356907), a client / server system performs a sequential search each time or a client such as Google Desk Top Search. By building a search engine and index engine on the machine, the body of the mail body on the client machine is searched. In other words, by having a search engine or index engine on the local machine, the body of the mail on the local machine is searched in the index type search method, and the contents of the search are scanned each time the search is executed To perform a sequential search.
JP 2004-356907 A

  However, the conventional client / server system has the following problems in providing a full-text search function for the mail text on the client machine.

  First, the conventional sequential search method scans the contents of the search target each time the search is executed, so that a heavy load is applied to the client machine and processing takes time.

  Secondly, in the conventional index type search method, when searching for the mail text on the client machine, it is necessary to have a search engine and an index engine on the client machine, which takes time and effort.

  Third, since the conventional index method has an index (index) on the client machine, it is difficult to implement a skew search between the index on the client machine and the index existing on the server side. It was.

(the purpose)
An object of the present invention is to provide a client / server system capable of performing sequential type search and index type search while suppressing a load on a client machine.

  To achieve the above object, the present invention provides a client / server system in which data on a data management server is acquired by a client terminal connected via a network, while the data exists on the data management server. And a search server that reflects the processing contents for the data by the client terminal in the index information.

  More specifically, the history of data operations (move, copy, delete) on the mail server and the client machine and the location of the data are recorded, and at a certain timing, the server side index (index) is recorded. By reflecting these records, an index-type full-text search function for data using an external search server is provided.

(Function)
With the above configuration, while data exists on the data management server, index information of the data is generated, and processing contents for the data by the client terminal are reflected in the index information.

  According to the present invention, it is possible to realize an index type search that can search a large amount of documents at high speed for data on a client machine as compared with a sequential type search without having a search engine or an index engine on the client machine.

  The reason is that while the data exists on the mail server, the search server creates an index of the data, and the client machine throws a search processing request to the search server. This is because an index-type full-text search can be performed, and the load on the client machine can be suppressed.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.

(Configuration of the first embodiment)
FIG. 1 is a block diagram showing a configuration of a client / server system according to the present embodiment.

  Referring to FIG. 1, a client / server system according to the present embodiment includes a mail server 10 that performs mail distribution processing, a client machine 20 that actually receives mail, and a search server that performs full-text search processing on the mail body. 30 are connected to each other via a data transfer path 40.

  The mail server 10 manages a central processing unit 11 that operates under program control, a mail reception processing unit 12 that performs mail reception processing, a mail distribution processing unit 13 that performs mail distribution processing, and a user who uses mail. A user management processing unit 14, a storage device 15, and a history management processing unit 16 that manages processing performed on the mail body on the mail server 10 and processing performed on the mail body on each client machine 20 by each user. Prepare.

  In addition, the storage device 15 includes a history management database (DB) 151 that records the history of processing performed on the mail body, and further includes an unsynchronized mail body and a synchronized mail body for each user. They are stored in the mail body storage area 152 (mail body storage area 152a (user A), mail body storage area 152b (user B)).

  Further, the history management processing unit 16 records the processing content (operation (registration / deletion / movement, etc.)) for the mail j itself, that is, what kind of operation is performed in the history management database 151.

  The client machine 20 includes a central processing unit 21 that operates under program control, a storage device 22 that stores the mail body, a mail reception processing unit 23 that receives the mail body from the mail server, and operations performed by the user on the mail body. An operation management unit 24 that manages (move, copy, delete), a communication unit 25 for notifying the history management processing unit on the mail server of operations performed by the user, and whether or not an email has been received from the mail server And a synchronization management unit 26 for management. The number of client machines 20 is not particularly restricted.

  Further, the storage device 22 stores an operation history table 221 that records a history of processing performed by each user on the mail body on the client machine 20, and a mail body that stores an unsynchronized mail body and a synchronized mail body. A storage unit 222.

  The search server 30 includes a central processing unit 31 that operates under program control, an index processing unit 32 that creates and updates an index, and an index that has a function of storing the time when the index update process is performed. An update processing management unit 33, a recording device 34 that records an actually created index (index) 341, a search processing unit 35 that performs a search process, and a search request input unit 36 that processes a search request from a user With.

  The indexes (indexes) managed by the search server 30 are not limited to those obtained by indexing the mail body, but also include those obtained by indexing content on other document management systems and RDB (relational database) systems.

  The search processing unit 35 has a function of piercing all these indexes (indexes) in a horizontal direction and executing a search process across.

  As described above, the present embodiment records the history of operations (movement, duplication, deletion) (processing contents) on the mail body on the mail server 10 and the client machine 20 and the location of the mail body, These records are reflected in the index of the search server 30 at a certain timing.

  FIG. 2 is a diagram showing the contents of processing on the mail body of the client / server system according to the present embodiment, and FIG. 3 shows the configuration of the history management database 151 that stores the history of information generated by the processing. FIG.

  That is, it is assumed that the processing for the mail body in the present embodiment is defined in six patterns as shown in FIG. 2, and the history management database 151 as shown in FIG. 3 is generated.

  Referring to FIG. 3, the history management database 151 records, for each mail ID 1511, a message ID including address information corresponding to FQDN (Fully Qualified Domain Name), a processing content, and a processing time in association with each other. Yes.

  FIG. 4 shows the configuration of the operation history table 221 for managing operations on the mail body on the client machine 20. Referring to FIG. 4, the operation history table 221 is based on the message ID and the message ID. The location information indicating the location of the mail main body, the processing content, and the processing time generated in association with each other are recorded in association with each other.

  FIG. 5 is a diagram showing an example of an inverted file which is an example of the index (index) 341. Referring to FIG. 5, the index (index) 341 is a word (index / index / mail / server / transmission path). -Corresponding mail ID 1511 is recorded in (File).

  Here, the hardware configuration of the search server 30 will be described.

  FIG. 6 is a block diagram illustrating a hardware configuration example of the search server 30 of the client / server system according to the present embodiment.

  Referring to FIG. 6, the search server 30 according to the present invention can be realized by a hardware configuration similar to a general computer device, and a main memory such as a CPU (Central Processing Unit) 1001 and a RAM (Random Access Memory). A main storage unit 1002 used for a data work area and a temporary data save area, a communication control unit 1003 that transmits and receives data via the data transfer path 40, a display unit 1004 such as a liquid crystal display, a printer, and a speaker, An input unit 1005 such as a keyboard and a mouse, an interface unit 1006 that transmits and receives data by connecting to peripheral devices, a hard disk including a nonvolatile memory such as a ROM (Read Only Memory), a magnetic disk, and a semiconductor memory Auxiliary storage unit 1007 is a location, and a system bus 1008 for connecting the above components of the information processing apparatus to each other.

  The search server 30 according to the present invention has its operation implemented by mounting circuit components made up of hardware components such as LSI (Large Scale Integration) in which a program for realizing such functions is incorporated in the search server 30. As a matter of course, it can be realized in software by executing a program for providing each function of each component described above by the CPU 1001 on the computer processing apparatus.

  That is, the CPU 1001 loads the program stored in the auxiliary storage unit 1007 to the main storage unit 1002 and executes it, and controls the operation of the search server 30 to realize each function described above in software.

  Note that the mail server 10 and the client machine 20 may have the above-described configuration, and each function described above may be realized in hardware or software.

(Operation of the first embodiment)
Next, the operation of the client / server system according to the present embodiment will be described in detail with reference to the drawings.

The client / server system according to the present embodiment largely performs the following processing at an arbitrary timing.
(1) A process in which the mail server 10 receives a new mail.
(2) Processing in which the client machine 20 receives mail from the mail server 10.
(3) Index creation processing performed by the search server 30 for mail on the mail server 10.
(4) A process of reflecting the operation on the mail body on the client machine 20 in the index.
(5) Search processing.

  Hereinafter, the contents of the above processes will be described in detail in order.

  (1) Process in which the mail server 10 receives a new mail

  FIG. 7 is a flowchart showing a process in which the mail server 10 of the present embodiment newly receives a mail.

  When the mail reception processing unit 12 on the mail server 10 receives the mail, the mail body is stored in the mail body storage area 152 of the user on the storage device 15 (step S101).

  Thereafter, the history management processing unit 16 assigns a unique ID (mail ID 1511) to the mail body (step S102), and the mail ID 1511 and processing contents (here, arrival of the mail body at the mail server 10: The processing content 1) and the processing time are recorded in the history management database 151 (step S103).

  As described above, the history management processing unit 16 records the processing content (operation (registration / deletion / movement, etc.)) for the mail j itself, that is, what kind of operation is performed in the history management database 151.

  In addition, the history management processing unit 16 does not use the file position information as a trigger, but performs a storage process of the data position information using the operation as a trigger.

  (2) Processing in which the client machine 20 receives mail from the mail server 10.

  FIG. 8 is a flowchart illustrating processing in which the client machine 20 according to the present embodiment receives mail from the mail server 10.

  When there is a mail body download request from the client machine 20 to the mail server 10, the mail server 10 transfers the mail body to the client machine 20 in accordance with the request (step S201).

  At this time, the client machine 20 does not newly acquire mail acquired in the past from the mail server 20 by the function of the synchronization management unit 26.

  Next, the history management processing unit 16 on the mail server 10 updates the history management database 151 based on the mail ID 1511 for the mail transferred to the client machine 20 (step S202).

  If the request from the client machine 20 is simply the transfer of the mail body, the processing content of the target mail ID 1511 at this time is processing content 2 (from the mail server 10 to the client machine 20 to the mail body). And the processing time is recorded in the history management database 151 (step S203).

  On the other hand, if the request from the client machine 20 includes the deletion of the mail in the mail body, the contents of the process contents 2 are recorded in the history management database 151 for the mail ID 1511, and then the process contents are further processed. 3 (deletion of the mail body from the mail server) is recorded in the history management database 151 together with the processing time (step S203).

  At this time, even if there is a mail deletion request from the client machine 20, the mail server 10 does not immediately delete the mail body, and executes the mail body deletion process after the process (3) described later. To do.

  (3) Index creation processing performed by the search server 30 for mail on the mail server 10.

  FIG. 9 is a flowchart showing index creation processing performed by the search server 30 of the present embodiment for mail on the mail server 10.

  When the search server 30 creates an index, first, the update time of its own index is compared with the processing time recorded in the history management database 151 on the mail server 10 (step S301). An index (index) creation process is performed for a history that is newer than the (index) update time (step S302).

  Specifically, the search server 30 performs processing as follows based on the processing content in the history management database 151.

Process contents 1 in the history management database 151: A new index process is performed.
Processing contents 2 in the history management database 151: The transposed file is updated in accordance with the location of the mail body notified from the client machine 20.
What is processing content 3 in the history management database 151: No processing to the index.
Processing contents 4 in the history management database 151: The transposed file is updated in accordance with the location of the mail body notified from the client machine 20.
Processing contents 5 in the history management database 151: The transposed file is updated in accordance with the location of the mail body notified from the client machine 20.
What is processing content 6 in the history management database 151: Delete the one having the target mail ID 1511 from the index.

  In addition, after the index creation process is completed, a deletion process is performed on the mail body for which a deletion request is issued from the mail server 10 from the client machine 20 (step S303).

  (4) A process of reflecting the operation on the mail body on the client machine 20 in the index.

  FIG. 10 is a flowchart showing processing for reflecting an operation on the mail body on the client machine 20 according to the present embodiment to the index.

  All operations performed on the client machine 20, such as moving to the mail body, copying, and deletion, are managed by the operation management unit 24 (step S401), and the location of the mail body is determined via the communication unit 25. The history management processing unit 16 on the mail server 10 can be notified (step S402).

(5) Search processing.
The search process is performed on the search server 30 from the client machine 20. Since this is the same method as the conventional index type search, the description is omitted.

(Effects of the first embodiment)
According to the present embodiment, the following effects can be achieved.

  First, even if the client machine 20 does not have a search engine or an index engine, it is possible to realize an index type search that can search a large amount of documents at high speed with respect to a mail body on the client machine 20 as compared with a sequential type search.

  The reason is that the client machine 20 sends a search processing request to the search server 30 in order to create an index of the mail body in the search server 30 while the mail body is on the mail server 10. This makes it possible to perform an index-type full-text search of the mail body.

  Secondly, by providing an index type search process on the search server 30 side, the client machine side provides an index type search function. It is possible to provide a full-text search function that points to the system and RDB system.

  The reason is that the mail index (index) is set on the search server 30 where the index (index) of the document management system or the RDB system exists rather than having the index (index) on the client machine 20. .

  Third, since an address recording method corresponding to FQDN (Fully Qualified Domain Name) is used, a storage location on a machine storing data under appropriate access control by tracing an address from an external machine Can know.

  Although the present invention has been described with reference to the preferred embodiments, the present invention is not necessarily limited to the above embodiments, and various modifications can be made within the scope of the technical idea. .

It is a block diagram which shows the structure of the client server system by the 1st Embodiment of this invention. It is a figure which shows the content of the process with respect to the mail main body of the client server system by 1st Embodiment. It is a figure which shows the structure of the log | history management database 151 which memorize | stores the log | history of the information by 1st Embodiment. It is a figure which shows the structure of the operation history table 221 for managing operation to the mail main body on the client machine 20 by 1st Embodiment. It is a figure which shows the example of the transposition file which is an example of the index (index) 341 by 1st Embodiment. It is a block diagram which shows the hardware structural example of the search server 30 of the client server system by 1st Embodiment. It is a flowchart which shows the process in which the mail server 10 by 1st Embodiment receives a mail newly. It is a flowchart which shows the process in which the client machine 20 by 1st Embodiment receives mail from the mail server 10. It is a flowchart which shows the index creation process which the search server 30 by 1st Embodiment performs with respect to the mail on the mail server. It is a flowchart which shows the process which reflects in the index (index) of operation with respect to the mail main body on the client machine 20 by 1st Embodiment.

Explanation of symbols

10: mail server 11: central processing unit 12: mail reception processing unit 13: mail distribution processing unit 14: user management processing unit 15: storage device 151: history management database 1511: mail ID
152: Mail main body storage area 16: History management processing unit 20: Client machine 21: Central processing unit 22: Storage device 221: Operation history table 222: Mail main body storage unit 23: Mail reception processing unit 24: Operation management unit 25: Communication unit 26: Synchronization management unit 30: Search server 31: Central processing unit 32: Index processing unit 33: Index update processing management unit 34: Recording device 341: Index (index)
35: Search processing unit 36: Search request input unit 1001: CPU
1002: Main storage unit 1003: Communication control unit 1004: Presentation unit 1005: Input unit 1006: Interface unit 1007: Auxiliary storage unit 1008: System bus

Claims (16)

In a client / server system in which a client terminal connected via a network acquires data on a data management server,
A client server comprising: a search server that generates index information of the data while the data is present on the data management server, and reflects a processing content for the data by the client terminal in the index information system. 2. The search server according to claim 1, wherein the search server executes an index-type full-text search function for data existing on the client terminal based on the index information reflecting the processing content. Client / server system. In the index information of the search server,
The history of processing contents for data on the data management server and the location of the data and the history of processing contents for data on the client terminal and the location of the data are reflected. Item 3. The client / server system according to Item 2. The location of the data is
4. The client / server system according to claim 1, wherein the client / server system is recorded by using address information corresponding to FQDN (Fully Qualified Domain Name). 5. A client / server system in which a client terminal connected via a network acquires data on a data management server, wherein the search server executes a search function for data on the client terminal,
A search server comprising means for generating index information of the data while the data is present on the data management server, and reflecting a processing content of the client terminal on the data in the index information. 6. The search server according to claim 5, wherein an index-type full-text search function is executed on data existing on the client terminal based on the index information reflecting the processing content. In the index information,
6. The processing content history and the data location on the data on the data management server, and the processing content history and data location on the client terminal are reflected. Item 7. The search server according to item 6. The location of the data is
The search server according to any one of claims 5 to 7, wherein the search server is recorded using address information corresponding to FQDN (Fully Qualified Domain Name). A search method in a client / server system in which a client terminal connected via a network acquires data on a data management server,
A search method, comprising: a search step of generating index information of the data while the data is present on the data management server, and reflecting a processing content for the data by the client terminal in the index information. The index type full-text search function is executed on data existing on the client terminal based on the index information reflecting the processing content in the search step. retrieval method. In the search step,
The index information reflects a history of processing contents and data location for data on the data management server and a history of processing contents and data location for data on the client terminal. The search method according to claim 9 or 10. The location of the data is
The search method according to any one of claims 9 to 11, wherein the search method is recorded using address information corresponding to FQDN (Fully Qualified Domain Name). A client / server system for acquiring data on a data management server by a client terminal connected via a network, a search program executed on a search server having a search function for data on the client terminal,
In the search server,
A search program for generating index information of the data while the data exists on the data management server, and realizing a function of reflecting processing contents for the data by the client terminal in the index information. In the search server,
The search program according to claim 13, wherein an index-type full-text search function is executed on data existing on the client terminal based on the index information reflecting the processing content. In the index information,
A function of reflecting a history of processing contents and data location on data on the data management server and a history of processing contents and data location on data on the client terminal is realized. Item 15. The search program according to item 13 or claim 14. The location of the data is
The search program according to any one of claims 13 to 15, wherein the search program is recorded using address information corresponding to FQDN (Fully Qualified Domain Name).

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