JP6357827B2 - Cache update control device, cache update control method, and cache update control program - Google Patents

Description

  The present invention relates to a cache update control device and the like that perform update control on a network cache that stores a copy of the information resource when an information resource stored in a server device or the like flows through a communication network.

  In the modern society where network services represented by cloud computing are rapidly increasing, there is an increasing expectation for technologies that realize high speed and high availability for network services.

  As a technique related to such a technique, Patent Document 1 discloses that data inconsistency does not occur at the time of data update or system update, and the service can be provided without stopping the system, thereby ensuring real-time processing. A data management system based on HTTP (HyperText Transfer Protocol) is disclosed.

  Further, Patent Document 2 discloses a system that analyzes an HTTP request from a client terminal device and searches information stored in an in-memory database according to the analysis result. In this system, as a result of searching the in-memory database, HTML (Hyper Text Markup Language) format data is generated for the obtained information, and the generated data is transmitted to the client according to HTTP.

JP 2013-025442 JP 2006-004328 A

  In a general client server system that provides a net service, a client terminal device performs a URI (Uniform Resource Identifier) that is information for selecting a resource (information resource) stored in the server device and an operation on the resource. A method, which is information to be specified, is transmitted as a request to the server device. Then, the server device processes the received request. At this time, there is a network cache technique that realizes shortening the time for the client terminal device to access the resource.

  This network cache can be provided in any electronic device connected to a communication network (hereinafter referred to as a network). The network cache stores a URI specifying a resource and a copy of the resource in association with each other. The client terminal device accesses not a resource stored in the server device but a copy of the resource stored in a network cache accessible at a higher speed than the server device. As a result, the client terminal device can process a request for a resource at a higher speed.

  Further, a resource provided in a general client-server system includes a structured document that is a resource in which a plurality of resources are structured. As a technique for efficiently processing this structured document, for example, there is XML (Extensible Markup Language). An XCAP (XML Configuration Access Protocol) server device that provides a structured document using XML uses a part of the structured document as a resource, interprets a URI for selecting the resource, and transparently accesses the resource. I will provide a.

  When an XCAP server apparatus updates a specific resource included in such a structured document, the XCAP server apparatus interprets the contents of the structure, and a plurality of resources structured in relation to the specific resource. Also updated in conjunction with. However, regarding the copy of the structured document stored in the network cache, the plurality of structured resources are not updated in conjunction with each other. That is, there is a possibility that the contents of the structured document stored in the XCAP server device and the copy of the structured document stored in the network cache do not match.

  Therefore, when a request for a structured document occurs, the client server system does not match the copy of the structured document stored in the network cache with the XCAP server that stores the structured document. It is necessary to check whether it has occurred. The client / server system or the structured document that is frequently updated needs to make the network cache itself unavailable. When the client server system performs such processing, the merit provided by the network cache cannot be used, and there is a problem that the system performance deteriorates. The techniques disclosed in Patent Documents 1 and 2 cannot solve this problem.

  A main object of the present invention is to provide a cache update control device, a cache update control method, and a cache update control program that solve this problem.

  The cache update control device according to an aspect of the present invention provides at least one or more second information in conjunction with the update of the first information resource among the plurality of information resources stored in the plurality of storage areas. When the information resource is updated, the first and second information resources are detected based on a predetermined criterion, and the addresses indicating the storage areas in which the first and second information resources are stored are associated with each other. A relation detecting means for generating the relevant information, and when an update relating to the first information resource occurs, by referring to the relevant information, a copy of the first information resource and the second information resource; Updating means for updating copies of the first information resource and the second information resource in a cache device storing the address indicating the storage area storing the second information resource in association with each other.

  In another aspect of achieving the above object, a cache update control method according to an aspect of the present invention provides a first information resource out of a plurality of information resources stored in a plurality of storage areas by an information processing device. In conjunction with being updated, when at least one or more second information resources are updated, the first and second information resources are detected based on a predetermined criterion, and the first and second information resources are detected. By generating related information in which addresses indicating the storage areas in which the information resources are stored are associated with each other, and when an update related to the first information resource occurs, the first and second are referred to by referring to the related information A copy of the first and second information resources in a cache device that stores the first and second information resources in association with an address indicating the storage area storing the first and second information resources. To.

  In a further aspect of achieving the above object, the cache update control program according to one aspect of the present invention updates a first information resource among a plurality of information resources stored in a plurality of storage areas. When at least one or more second information resources are updated in conjunction with the above, the first and second information resources are detected based on a predetermined criterion, and the first and second information resources are When an update related to the first information resource is generated and related detection processing for generating related information in which addresses indicating the stored storage areas are associated with each other, the first and second are referred to by referring to the related information. Of the first and second information resources in a cache device that stores a copy of the second information resource and an address indicating the storage area in which the first and second information resources are stored. To execute an updating process of updating the teeth, to the computer.

  Furthermore, the present invention can also be realized by a computer-readable non-volatile storage medium storing such a cache update control program (computer program).

  The present invention makes it possible to access the information resource in the latest state via the cache even when a plurality of information resources are updated in conjunction with each other.

It is a block diagram which shows the structure of the cache update control system which concerns on 1st Embodiment of this invention. It is a flowchart which shows the operation | movement which the cache update control apparatus which concerns on 1st Embodiment of this invention updates the content of a cache part. It is a flowchart which shows the operation | movement which the related detection part which concerns on 1st Embodiment of this invention produces | generates related information. It is a figure which shows the structural example of the structured document which concerns on 1st Embodiment of this invention. It is a figure which shows the structural example of the relevant information which concerns on 1st Embodiment of this invention. It is a figure which illustrates the condition (before cache update) where the cache part which concerns on 1st Embodiment of this invention stores the copy of a resource. It is a figure which illustrates the condition (after cache update) where the cache part which concerns on 1st Embodiment of this invention stores the copy of a resource. It is a block diagram which shows the structure of the cache update control apparatus which concerns on 2nd Embodiment of this invention. It is a block diagram which shows the structure of the information processing apparatus which can execute the cache update control apparatus which concerns on each embodiment of this invention. It is a figure which illustrates the condition (after a cache update) where a cache part stores the copy of a resource when not using the technique which this invention disclosed.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<First Embodiment>
FIG. 1 is a block diagram conceptually showing the structure of the cache update control system 1 according to the first embodiment. The cache update control system 1 according to the present embodiment includes a cache update control device 10, a client terminal device 20, and a content server device 30. The cache update control device 10, the client terminal device 20, and the content server device 30 are connected to a network so as to communicate with each other.

  The content server device 30 is a server device such as an XCAP server device, for example. The content server device 30 stores n (n is an integer of 2 or more) resources 300-1 to n as content. In this embodiment, it is assumed that the resources 300-1 to 300-n construct a structured document.

  An example of the structure of a structured document stored in the content server device 30 is shown in FIG. Here, it is assumed that the content server device 30 is an XCAP server device and stores a structured document using XML.

  In the example shown in the structured document configuration 301 in FIG. 4, the value indicated by n is 4, and the resources 300-1 to 300-4 construct the structured document. A URI that designates a structured document using XML includes a portion indicating an XCAP route, a portion indicating a document selector, and a portion indicating a node selector.

  The XCAP route is information indicating the location where the structured document is stored. The document selector is an identifier that can identify a structured document. The node selector is an identifier that can identify a resource for constructing a structured document. As indicated by the node selectors for the resources 300-1 to 300-4 in the structure 301 of the structured document, the resources 300-1 to 300-4 are structured documents in a hierarchical structure. In this example, the resource 300-4 is located in the highest hierarchy, the resource 300-3 is located in the next lower hierarchy, and the resource 300-2 is located in the next lower hierarchy. The resource 300-1 is located in the next lower hierarchy.

  The client terminal device 20 accesses the resources 300-1 to 300-n stored in the content server device 30. At this time, requests to the resources 300-1 to 300-n issued by the client terminal device 20 are processed by the cache update control device 10 located in the middle of the communication path from the client terminal device 20 to the content server device 30.

  The cache update control device 10 includes a relation detection unit 11, an update unit 12, a cache unit 13, a reading unit 14, a client terminal device interface unit 15, and a content server device interface unit 16. The association detection unit 11 and the update unit 12 may be an electronic circuit, or may be realized by a computer program and a processor that operates according to the computer program.

  The cache unit 13 is a storage device such as an electronic memory. In the present embodiment, the cache update control device 10 includes the cache unit 13, but the cache unit 13 may be a device different from the cache update control device 10. The cache unit 13 stores resource copies 130-1 to 130-n, which are copies of the resources 300-1 to 300-n.

  The situation where the cache unit 20 stores the resource copies 130-1 to 130-n is illustrated in FIG. FIG. 6 is an example of the resource copy storage status 131 before the cache update when the content server device 30 stores the structured document shown in FIG. The resources 300-1 to 300-4 corresponding to the resource copies 130-1 to 130-n construct a structured document in the content server device 30, respectively. The cache unit 13 stores the resource copies 130-1 to 130-4 using a URI indicating the storage location of the resources 300-1 to 300-4 as a key. In the example illustrated in FIG. 6, for example, the key associated with the resource copy 130-1 is “http://example.example.com/AUID/global/DOC1/˜˜/EL1/EL11/@AT111”. is there.

  The client terminal device interface unit 15 receives a request issued by the client terminal unit 20 and inputs the request to the association detection unit 11, the update unit 12, and the reading unit 14. For example, when the client terminal device interface unit 15 receives a request referring to the resource 300-i (i is an integer of at least one of 1 to n), the resource read from the cache unit 13 via the reading unit 14 A copy 130-i of the client is transmitted to the client terminal device 20.

  The content server interface unit 16 obtains the resource 300-i from the content server device 30 when the copy of the resource 300-i specified by the request issued by the client terminal measure 20 is not stored in the cache unit 13. The content server interface unit 16 stores the acquired resource 300-i in the cache unit 13 through the update unit 12 as a resource copy 130-i.

  The association detection unit 11 generates the association information 110 based on information included in the request for updating the resource 300-i obtained from the client terminal device interface unit 15. The related information 110 is information in which URIs indicating the resources 300-1 to 300-n that construct the structured document are associated with each other.

  A configuration example of the related information 110 according to the present embodiment is illustrated in FIG. FIG. 5 shows a configuration example of the related information 110 when the client terminal device 20 issues a request to update the resource 300-1 when the content server device 30 stores the structured document shown in FIG. Show.

  The association detection unit 11 extracts a document selector and a node selector from the URI indicating the resource 300-1 included in the request. The association detection unit 11 does not generate the association information 110 when the URI does not include a node selector. The association detection unit 11 generates the association information 110 associated with the URI in the XCAP route using the value indicated by the document selector as the association cache key. The related cache key is information that can identify a resource that forms a structured document together with a resource to be updated. At this point, the related information 110 is as shown in FIG.

  The relation detection unit 11 sets the node selector included in the URI indicating the resource 300-1 as a selection node that is a reference for the process of generating the relation information 110. The association detection unit 11 acquires a node selector that is the parent of the selected node (that is, located in the hierarchy one level above). In the case of the example shown in FIG. 4, since the node selector related to the resource 300-1 is “EL1 / EL11 / @ AT111”, the association detection unit 11 performs the syntax analysis to determine the parent of the resource 300-1. As a node selector, “EL1 / EL11” is acquired. “EL1 / EL11” is a node selector related to the resource 300-2. The association detection unit 11 registers the acquired node selector and the value indicated by the document selector regarding the resource 300-2 in the association information 110 as the association cache key. At this point, the related information 110 is as shown in FIG.

  Next, the relation detection unit 11 performs the same processing by setting the node selector related to the acquired resource 300-2 as the selected node. In the case of the example shown in FIG. 4, since the node selector related to the resource 300-2 is “EL1 / EL11”, the association detection unit 11 performs the syntax analysis to thereby determine the node selector that is the parent of the resource 300-2. As a result, “EL1” is acquired. This “EL1” is a node selector related to the resource 300-3. The association detection unit 11 registers the acquired node selector and the value indicated by the document selector regarding the resource 300-3 in the association information 110 as the association cache key. At this point, the related information 110 is as shown in FIG.

  Next, the relation detection unit 11 sets a node selector for the acquired resource 300-3 as a selected node and performs the same processing. In the example shown in FIG. 4, since the node selector related to the resource 300-3 is “EL1”, the association detection unit 11 performs the syntax analysis so that the node selector that is the parent of the resource 300-3 is the root. Detect that it is a node. At this point, the association detection unit 11 determines that there are no more associated cache keys to be additionally registered in the association information 110 and completes the generation of the association information 110.

  When the client terminal device 20 issues a request to update the resource 300-i, the update unit 12, based on the information included in the request and the related information 110, the resource copy 130-i and the resource 300- Update the resource copy corresponding to the resource that builds the structured document with i.

  Resource copy storage state after cache update when the update unit 12 processes a request to update the resource 300-1 while the cache unit 13 stores the resource copies 130-1 to 130 shown in FIG. 132 is illustrated in FIG. In the example illustrated in FIG. 7, the request issued by the client terminal device 20 instructs to update the character string “value111” in the resource 300-1 to the character string “newValue”. Based on the URI indicating the resource 300-1 included in the request, the update unit 12 uses a character string “value111” in the resource copy 130-1 stored in the cache unit 13 using the URI as a key. Update to the string “newValue”.

  The updating unit 12 confirms that three related cache keys are registered for the URI indicating the resource 300-1 in the related information 110 illustrated in FIG. The update unit 12 detects resource copies 130-2 to 130-4 including these related cache keys as keys. The update unit 12 updates the character string “value111” in the resource copies 130-2 to 130-4 to the character string “newValue”.

  In addition, when the client terminal device 20 issues a request to update the resource 300-i, the updating unit 12 updates the resource copy 130-i based on the information included in the request and the related information 110. The resource copy corresponding to the resource for constructing the structured document together with the resource 300-i may be deleted from the cache unit 13. In this case, when a request for a resource corresponding to the copy of the deleted resource is issued from the client terminal device 20, the content server device interface unit 16 obtains the latest resource from the content server device 30. Then, the content server device interface unit 16 stores the obtained resource as a copy of the resource in the cache unit 13 via the update unit 12.

  The updating unit 12 may also detect that the resource copy 130-i includes the resource copy 130-j (j is an integer from 1 to n excluding i). . Then, when the resource copy 130-i includes the resource copy 130-j, the update unit 12 changes the content of the resource copy 130-j to the resource whose content matches the resource copy 130-j. To the information indicating the portion of the copy 130-i. In this case, when the reading unit 14 accesses the resource copy 130-j, the reading unit 14 accesses a portion of the resource copy 130-i whose content matches that of the resource copy 130-j.

  For example, in the example illustrated in FIG. 6, the update unit 12 detects that the content of the resource copy 130-3 is equal to the content of the resource copy 130-4. In this case, the updating unit 12 updates the content of the resource copy 130-3 to, for example, the value indicated by the key related to the resource copy 130-4. In the example illustrated in FIG. 6, the updating unit 12 detects that the content of the resource copy 130-2 is equal to the content of the second line from the top in the resource copy 130-4. In this case, the updating unit 12 updates the contents of the resource copy 130-2 to the value indicated by the key related to the resource copy 130-4 and the value indicated by the second line from the top in the resource copy 130-4. .

  Next, an operation (process) in which the cache update control device 10 according to the present embodiment updates the contents of the cache unit 13 will be described in detail with reference to the flowchart of FIG.

  The client terminal device interface unit 15 receives a request for updating the resource 300-i from the client terminal device 20 (step S101). The association detection unit 11 generates the association information 110 related to the update target resource 300-i (step S102). The updating unit 12 updates the resource copy 130-i corresponding to the resource 300-i according to the content of the request (step S103).

  The update unit 12 refers to the related information 110 and checks whether there is an unupdated copy of the resource indicated by the related cache key related to the resource 300-i (step S104). If there is no copy of an unupdated resource (No in step S105), the entire process ends. If there is an unupdated resource copy (Yes in step S105), the update unit 12 updates the unupdated resource copy in accordance with the content of the request (step S106), and the process returns to step S104.

  Next, with reference to the flowchart of FIG. 3, an operation (process) in which the association detection unit 11 according to the present embodiment generates the association information 110 will be described in detail.

  The association detection unit 11 acquires a document selector related to the URI indicating the resource to be updated (step S201). If the URI does not include a node selector (No in step S202), the entire process ends. When the URI includes a node selector (Yes in step S202), the relationship detection unit 11 registers the value indicated by the document selector in the related information 110 as a related cache key (step S203).

  The association detection unit 11 sets the node selector included in the URI as the selected node (step S204). The association detection unit 11 acquires a node selector that is a parent of the selected node (step S205). If the acquired node selector is the root node (Yes in step S206), the entire process ends.

  If the acquired node selector is not the root node (No in step S206), the association detection unit 11 registers the document selector and the value indicated by the node selector in the associated information 110 as the associated cache key (step S207). The association detection unit 11 sets the node selector as the selected node (step S208), and the process returns to step S205.

  The cache update control system 1 according to the present embodiment can access the information resource in the latest state via the cache even when a plurality of information resources are updated in conjunction with each other. The reason is that the association detection unit 11 generates association information 110 that associates information resources that are updated in conjunction with each other, and the update unit 12 stores information that is updated in conjunction with the cache based on the association information 110. This is because the resource copy is updated.

  When an update occurs in at least one of a plurality of resources that construct a structured document, the update usually spreads to resources other than the resource in which the update has occurred in the plurality of resources. Therefore, when copies of such a plurality of resources are stored in the network cache, it is necessary to perform linked updates for the copies of the plurality of resources.

However, a general cache update control apparatus that updates and manages a network cache does not have a function of performing such linked updates. FIG. 10 illustrates a resource copy storage state 133 after cache update when any of the plurality of resources is updated when the technology disclosed in the present invention is not used. Also in the example shown in FIG. 10, the request issued by the client terminal device 20 is the same as in the example shown in FIG.
It is instructed to update the character string “value111” in the resource 300-1 to the character string “newValue”. In accordance with the instruction of the request, the cache update control device updates the character string “value111” in the resource copy 130-1 to the character string “newValue”. However, the cache update control device in this case does not update the character string “value111” in the resource copies 130-2 to 4 to the character string “newValue” as in the example shown in FIG. Can not.

  As a result, in this case, a situation occurs in which the resources 300-2 to 4 and the resource copies 130-2 to 4 that should be copies do not match. For this reason, the cache update control system must avoid the occurrence of an illegal result or a failure by using a copy of a resource whose value is invalid. Therefore, the cache update control system determines whether or not there is a mismatch between the structured document stored in the content server device 30 and the copy of the structured document stored in the network cache. It is necessary to confirm. The cache update control system, or alternatively, needs to make the network cache itself unavailable for structured documents that are frequently updated. As a result, the performance of the cache update control system is degraded.

  In contrast, in the cache update control system 1 according to the present embodiment, the association detection unit 11 generates association information 110 that associates resources that are updated in conjunction with each other. Then, the update unit 12 updates the copy of the resource that is stored in the network cache and is updated in conjunction with the related information 110. For this reason, in the cache update control system 1 according to the present embodiment, the network cache can be used as it is even when the update relating to the structured document is performed. Therefore, it is possible to perform update processing related to the structured document at high speed.

  In addition, the update unit 12 according to the present embodiment corresponds to a resource that builds a structured document together with the resource 300-i after updating the resource copy 130-i in response to a request to update the resource 300-i. A copy of the resource can also be deleted from the cache unit 13. Also by this process, the cache update control system 1 can avoid a situation in which a resource that is updated in conjunction with the resource 300-i does not match the resource copy. Therefore, the cache update control system 1 according to the present embodiment has a simpler process as compared with the case where the resource 300-i and the resource copy corresponding to the resource for constructing the structured document are updated in conjunction with each other. Update processing related to structured documents can be performed at high speed.

  Further, the update unit 12 according to the present embodiment detects that the resource copy 130-i includes the resource copy 130-j, and changes the contents of the resource copy 130-j to the resource copy 130. It is also possible to update to information indicating a part that matches the resource copy 130-j in -i. The resources that build the structured document may be similar in content. For example, in the case of the example shown in FIG. 6, if the cache unit 13 individually stores the resource copies 130-3 to 4 having overlapping contents, it cannot be said that the memory is effectively used. The cache update control system 1 according to the present embodiment can effectively use the memory of the cache unit 13 by not storing the duplicated content in the cache unit 13 with respect to the resource having the duplicated content.

<Second Embodiment>
FIG. 8 is a block diagram conceptually showing the structure of the cache update control device 40 of the second embodiment.

  The cache update control device 40 according to the present embodiment includes a relation detection unit 41 and an update unit 42.

  In the present embodiment, in conjunction with the update of the first information resource 600-0 among the plurality of information resources stored in the plurality of storage areas 60-0 to m (m is an integer of 1 or more). Thus, the second information resources 600-1 to 600-m are updated.

  The association detection unit 41 detects the first information resource 600-0 and the second information resources 600-1 to 600-m based on a predetermined criterion. The association detection unit 41 generates association information 410 in which addresses indicating the storage areas 60-0 to 60-m in which the first information resource 600-0 and the second information resources 600-1 to 600-m are stored are associated with each other. .

  The update unit 42 refers to the related information 410 when an update related to the first information resource 600-0 occurs. Then, the updating unit 42 updates the first information resource copy 51-0 and the second information resource copies 51-1 to 51-m in the cache device 50.

  The cache device 50 stores the first information resource copy 51-0 and the second information resource copies 51-1 to m, the first information resource 600-0 and the second information resource 600-1 to m. Addresses indicating the stored storage areas 60-0 to m are stored in association with each other.

  Even when a plurality of information resources are updated in conjunction with each other, the cache update control apparatus 40 according to the present embodiment can access the information resource in the latest state via the cache. The reason is that the association detection unit 41 generates association information 410 that associates information resources that are updated in conjunction with each other, and the update unit 42 stores information that is updated in association with the cache based on the association information 410. This is because the resource copy is updated.

<Hardware configuration example>
In each embodiment described above, each unit illustrated in FIG. 1 and FIG. 8 can be realized by a dedicated HW (Holdware) (electronic circuit). Further, at least the association detection units 11 and 41 and the update units 12 and 42 can be regarded as a function (processing) unit (software module) of the software program. However, the division of each part shown in these drawings is a configuration for convenience of explanation, and various configurations can be assumed for mounting. An example of the hardware environment in this case will be described with reference to FIG.

  FIG. 9 is a diagram exemplarily illustrating a configuration of an information processing apparatus 900 (computer) that can execute the cache update control apparatus according to the exemplary embodiment of the present invention. 9 is a configuration of a computer (information processing apparatus) capable of realizing the cache update control apparatus shown in FIGS. 1 and 8, and is a hardware environment capable of realizing each function in the above-described embodiment. Represents.

  The information processing apparatus 900 shown in FIG. 9 includes a CPU 901, a ROM (Read_Only_Memory) 902, a RAM (Random_Access_Memory) 903, a hard disk 904 (storage device), and a communication interface 905 (Interface: hereinafter referred to as “I / F”). A reader / writer 908 capable of reading and writing data stored in a storage medium 907 such as a CD-ROM (Compact_Disc_Read_Only_Memory), and an input / output interface 909, which are connected via a bus 906 (communication line). General computer.

  The present invention described using the above-described embodiment as an example is the block configuration diagram (FIGS. 1 and 8) referred to in the description of the embodiment for the information processing apparatus 900 illustrated in FIG. After supplying a computer program capable of realizing the functions of the association detection units 11 and 41, the update units 12 and 42, or the flowcharts (FIGS. 2 to 3), the computer program is read and interpreted by the CPU 901 of the hardware. And is achieved by executing. The computer program supplied to the apparatus may be stored in a readable / writable volatile storage memory (RAM 903) or a nonvolatile storage device such as the hard disk 904.

  In the above-described case, the computer program can be supplied to the hardware by a method of installing in the apparatus via various storage media 907 such as a CD-ROM, or an external method via a communication line such as the Internet. A general procedure can be adopted at present, such as a method of downloading more. In such a case, it can be understood that the present invention is configured by a code constituting the computer program or a storage medium 907 in which the code is stored.

  The present invention has been described above using the above-described embodiment as an exemplary example. However, the present invention is not limited to the above-described embodiment. That is, the present invention can apply various modes that can be understood by those skilled in the art within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Cache update control system 10 Cache update control apparatus 11 Association detection part 110 Related information 12 Update part 13 Cache part 130-1 thru | or n Resource copy 131 Resource copy storage state before cache update 132 Resource copy storage state after cache update 133 Resource copy storage status after cache update 14 Reading unit 15 Client terminal device interface unit 16 Content server device interface unit 20 Client terminal device 30 Content server device 300-1 to n Resource 301 Structure of structured document 40 Cache update control device 41 Related Detection unit 42 Update unit 50 Cache device 51-0 First information resource copy 51-1 to m Second information resource copy 60-0 to m Storage area 600- The first resource 600-1 to m second resource 900 information processing device 901 CPU
902 ROM
903 RAM
904 Hard disk 905 Communication interface 906 Bus 907 Storage medium 908 Reader / writer 909 Input / output interface

Claims (9)

At least one or more second information resources are updated in conjunction with the update of the first information resource among the plurality of information resources stored in a hierarchical structure in the plurality of storage areas. when the first and second information resource is detected based on the hierarchical structure, related detection said first and second resource generates a relevant information indicating the hierarchical structure for the storage area stored Means,
A cache device for storing a copy of the first and second information resources in an aspect based on the hierarchical structure;
If updates regarding the first information resource has occurred, by referring to the related information, before Kiki Yasshu apparatus, and updating means for updating the first and copy of the second information resource,
A cache update control device. The update means deletes the copy of the second information resource without updating when an update related to the first information resource occurs.
The cache update control device according to claim 1. The association detection unit includes at least one or more second subordinates dependent on at least one or more hierarchies in the first storage area in which the first information resource is stored in the plurality of storage areas having a hierarchical structure. Detecting the information resource stored in the storage area as the second information resource,
The cache update control device according to claim 1 or 2. The association detection means parses a URI (Uniform Resource Identifier) indicating the first storage area with respect to the first and second information resources using XML (Extensible Markup Language), thereby analyzing the second information resource. Detect information resources,
The cache update control device according to claim 3. The updating means detects that the third information resource of the first and second information resources includes the fourth information resource, and changes the fourth information resource to the fourth information resource. Updating the information to indicate the portion of the third information resource that matches the information resource;
The cache update control apparatus according to claim 1. By the related detection means provided in the information processing device,
At least one or more second information resources are updated in conjunction with the update of the first information resource among the plurality of information resources stored in a hierarchical structure in the plurality of storage areas. If, generates relevant information representative of the first and second information resource detected on the basis of the hierarchical structure, the hierarchical structure relating to the first and the storage area where the second information resource is stored,
By the cache device provided in the information processing apparatus,
Storing a copy of the first and second information resources in a manner based on the hierarchical structure;
By the update means provided in the information processing apparatus,
If updates regarding the first information resource has occurred, by referring to the related information, before Kiki Yasshu device, it updates the first and copy of the second information resource,
Cache update control method. If an update relating to the first information resource occurs by the updating means, deleting a copy of the second information resource without updating;
The cache update control method according to claim 6 . At least one or more second information resources are updated in conjunction with the update of the first information resource among the plurality of information resources stored in a hierarchical structure in the plurality of storage areas. when the first and second information resource is detected based on the hierarchical structure, related detection said first and second resource generates a relevant information indicating the hierarchical structure for the storage area stored Processing,
A storage process for storing a copy of the first and second information resources in a cache device in an aspect based on the hierarchical structure;
If updates regarding the first information resource has occurred, the update process by referring to the related information, before Kiki Yasshu device, for updating the first and copy of the second information resource,
A cache update control program that causes a computer to execute. 9. The cache update control program according to claim 8 , wherein, when an update related to the first information resource occurs, the computer executes the update process of deleting the copy of the second information resource without updating it.

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