CN1330328A - Information repeater and storage medium - Google Patents
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- CN1330328A CN1330328A CN 00118732 CN00118732A CN1330328A CN 1330328 A CN1330328 A CN 1330328A CN 00118732 CN00118732 CN 00118732 CN 00118732 A CN00118732 A CN 00118732A CN 1330328 A CN1330328 A CN 1330328A
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Abstract
An information repeater is composed of memory unit for storing the data provided by server, updating period setting unit for defining the update period of the data stored in memory unit, copy unit for copying the data from server by said updating period and storing the copied data to the memory unit, and return unit for returning the data from memory unit to client when a data request from client is received.
Description
The present invention relates to information relay device and storage unit, in particular to the information relay device that is used for the information that server computer produces on the network between Relay Server and the client computer.
The Japanese patent application No.10-361124 that present patent application was submitted to based on Dec 18th, 1998, its whole contents all is included in herein as a reference.
Be in the Distributed Computer System of representative with WWW (WWW) and FTP (file transfer protocol (FTP)) service, unique identification string of definition message block (hereinafter referred to as content) is relevant with each data content under the URL form.Client machine system (hereinafter referred to as client computer) can extract content by specified URL from server system (hereinafter referred to as server).
In some cases, when using this type systematic, between client computer and server, insert the information relay device that is called acting server.Acting server has some functions, and wherein one is exactly high-speed cache.
Utilize this caching function, the content that indicates when client computer just is stored in cache area during by acting server.By this data cache, when client computer output was watched requests for content once more, the data in the high-speed cache were returned, and were replacing between server and the server by the transmission of data by network thereby saved.This just can respond the request from client computer fast.
The operation of the high speed cache proxy server of implementing is usually at present below described.Operation under the WWW is below described.
1. when the demonstration request that receives from client computer, acting server is checked cache area.
2. if there is the copy of the content-data of client requests in the cache area, and copy is in date of expiration, and then acting server returns copy to client computer.When server obtains content, send information date of expiration.
3. if content-data is expired, then in order to check whether data are nearest data, acting server is to the last content update time of www server inquiry of storage textual content.
If the final updating time of original text consistent with the update time of copy, then acting server returns the content in the high-speed cache to client computer.
5. if the final updating time of original text is later than the update time of data in the high-speed cache, then acting server is downloaded the textual content data, and it is returned client computer, and upgrades high-speed cache.
Situation described in 2-4 is called " high-speed cache is hit ".
The condition that response is hit high-speed cache from the information acquisition request of client computer can be summarized as follows:
The content of corresponding institute request URL is present in high-speed cache (hereinafter referred to as existing).
Corresponding content in the high-speed cache and interior consistent (hereinafter referred to as brand-new) of server.
Consider the character of these conditions, just hit high-speed cache when only the copy data in high-speed cache satisfies existence and brand-new condition simultaneously.
According to dubbing system that is used for database or so-called push technology, when the relative predetermined content of the content on the server was upgraded, the client computer that comprises reproducting content was apprised of variation, and reproducting content is become nearest state.
By utilizing the push technology in the proxy server cache management, nearest content is used as the content stores of corresponding predetermined URL in cache area.Therefore, the cache hit rate of client requests is higher than common acting server, and average response time shortens when client browses.If the content on the server is often upgraded, then effect is more obvious.
Can utilize to be called the technology that intelligence is drawn, be not push technology though say it from the strict sense, still is called as push technology usually.The push technology that initiatively sends content with above-mentioned server side is opposite, and in intelligence was drawn, client-side periodically obtained content to realize the state the same with utilizing push technology apparently.
The Castanet that U.S. Marimba joint-stock company provides is an example of using intelligent pull technology on acting server.
The Castanet of Marimba joint-stock company is made up of transmitter with server capability and the tuner with client functionality.Tuner checks periodically whether the content of URL default on the corresponding tuner is upgraded on transmitter, the content of down loading updating, and on tuner, upgrade xcopy.
When sending the request of reference content, show the reproducting content on the tuner from the user.If therefore tuner is used as the acting server of WWW browser, then can realize high-speed response.In this case, if during, return copy from the content of high-speed cache on the corresponding tuner of the refer request of WWW browser.Otherwise, from original text downloaded content.
Because the internally cached content of tuner is updated periodically and is nearest state, then high-speed cache satisfies the probability of brand-new condition greater than the probability of utilizing common acting server.
Disclosed the technology of two kinds of agent process of a kind of preparation.According to this technology, first agent process has common agent functionality, and second agent process have from Internet Server download the original text data and according to write URL order the access log that first agent process generates with data storage in high-speed cache.
But the information relay device that comprises caching function has following problem.
Suppose the caching function that utilizes the aforementioned cache acting server.In this case, if the renewal frequency of textual content is lower on the server, then the caching function of high speed cache proxy server is effectively worked.If but the renewal frequency of textual content is very fast, then since high-speed cache to satisfy the probability of brand-new condition lower, so the hit rate of high-speed cache reduces.This has brought problem for the effect of proxy server cache.
In addition, if adopt above-mentioned push technology or intelligent pull technology, then have only predetermined content to duplicate.In the system of undefined textual content, the probability that high-speed cache satisfies existence condition is lower in as WWW, and hit rate reduces.If for example improve the performance relevant with existence condition by default enough big amount of content data as pushing away target, then required cache capacity is excessive.Therefore this technology is infeasible.
In the technology of preparing two kinds of agent process, owing to come cache content according to the sequential of the access log increase that obtains with first agent process, thus unless send request by client computer, high-speed cache can properly not upgrade.Even therefore textual content changed in date of expiration, client computer can not be obtained new content.
The present invention under the circumstances, and its target provides a kind of information relay device, wherein the renewal frequency of textual content is higher, and can shorten average response time in client computer when the server output information of quantification is not obtained request, of the present invention also have a target to provide a kind of storage medium.
In order to realize above-mentioned target, according to a first aspect of the present invention, the information relay device that provides comprises:
Storage area is used for the data that the storage server computing machine provides;
Upgrade determining section at interval, be used for determining the renewal interval of the data of storage area stored according to predetermined condition;
Duplicate part, be used for duplicating corresponding stored being stored in the storage area in storage area at interval from the data of the data of server computer and with copy data to upgrade renewal that determining section at interval determines; And
Returning part is used for returning client computer when will duplicate the data that partly are stored in storage area when client computer receives data acquisition request.
According to the present invention, upgrade determining section at interval at interval according to the renewal of predetermined condition specified data, and according to the renewal of determining at interval from the server replicates data.Therefore compare with the situation of Data Update fixed interval, specified data is upgraded at interval neatly.Therefore improved the performance of response from the data acquisition request of client computer.
According to a second aspect of the present invention, a kind of information relay device according to first aspect is provided,
Wherein storage area, upgrade determining section at interval, duplicate part and returning part and be included in the acting server with at server computer and utilize relay data between the client computer of data.
According to a third aspect of the present invention, the device according to first aspect is provided,
Wherein upgrade renewal that determining section at interval determines each data at interval, and duplicate part and duplicate corresponding stored being stored in the storage area in storage area at interval from the data of the data of server computer and with copy data with the renewal of upgrading determining section at interval and determining.
According to the present invention, the renewal of each data is determined according to the characteristic of each data at interval, has been improved response performance thus.
According to a fourth aspect of the present invention, the device according to the third aspect is provided,
Wherein upgrade renewal that frequency that determining section at interval obtains services request according to client data determines each data at interval.
According to a fifth aspect of the present invention, the device according to the third aspect is provided,
Wherein upgrading at interval, determining section changes the renewal interval that frequency is determined each data according to the server computer data.
According to a sixth aspect of the present invention, the device according to first aspect is provided,
Wherein device comprises that further copy uses determining section, and whether the data that are used for determining the storage area stored when the reception data acquisition request are in date of expiration; And
Duplicate part and inquire about the attribute information that is stored in the data in the storage area to server computer, when duplicating when using the determining section specified data within date of expiration, according to determining as the data attribute information of Query Result whether corresponding data are updated on server computer, and when upgrading, specified data obtains data from server computer.
According to a seventh aspect of the present invention, the device according to first aspect is provided, wherein storage area further comprises and the relevant memory access restricted information of storage data; And
The client computer return data that returning part is only visited to permission according to access restriction information.
According to a eighth aspect of the present invention, the device according to the third aspect is provided,
Wherein upgrade the interval determining section and determine the renewal interval of each data according to the load on the server.
According to a ninth aspect of the present invention, the device according to the third aspect is provided,
Wherein upgrade the interval determining section and determine the renewal interval of each data according to the load on the information relay device.
According to the 10th aspect of the present invention, the device according to the third aspect is provided,
Wherein the information relay device links to each other with server computer by network, and
Upgrade the interval determining section and determine the renewal interval of each data according to network load.
According to the 11st aspect of the present invention, a kind of information relay device is provided, comprising:
The information relay part; And
Server computer,
Wherein information relay partly comprises:
Notification section is used for the identifying information announcement server computing machine with the client requests data; And
Returning part is used for the data from server computer are returned client computer; And
Server computer comprises:
The identifying information storage area, the identifying information that is used for log-on data upgrades operation to monitor, wherein the identifying information partly notified of the further registration notification of identifying information storage area;
The test section, whether the data that are used to detect the identifying information indication of registering in the identifying information storage area are updated; And
Send part, be used for when the test section detects data and is updated, sending detected data to server computer.
According to the present invention, owing to can increase the identifying information of the data whether designation data be updated, so can determine the data that are monitored on the server neatly, can improve response performance, and compare the memory space minimum that data traffic on the network and cache stores are required with the situation that the identifying information of data is fixing.
According to the 12nd aspect of the present invention, a kind of device according to the 11st aspect is provided,
Wherein information relay partly is included in the acting server with at server computer and utilize relay data between the client computer of data.
According to the 13rd aspect of the present invention, the device according to the 11st aspect is provided,
Wherein information relay part is notified to the identifying information that is stored in the identifying information storage area according to the data of client requests and the condition relevant with the client requests data with the identifying information of corresponding deleted data; And
The identifying information storage area identifying information that deletion is notified by the deletion notification section from the registration identifying information.
According to the present invention, owing to can delete unwanted identifying information the identifying information in being stored in information storage part, so can reduce the load of server.
According to the 14th aspect of the present invention, a kind of computer-readable information recording medium is provided, the computer program of first aspect present invention realized in record on it.
According to the 15th aspect of the present invention, a kind of computer-readable information recording medium is provided, the computer program of the server of third aspect present invention realized in record on it.
Be appreciated that other targets of the present invention and advantage by the following description of this invention.Be appreciated that target of the present invention and advantage by enforcement means and combination.
Below the accompanying drawing of a book part only has illustrative nature together with embodiment as an illustration.
Fig. 1 is the block diagram that comprises the network system of acting server, has used the information relay device according to first embodiment of the invention on the acting server;
Fig. 2 is the URL and the ID example schematic of transfer source;
Fig. 3 is the synoptic diagram of input information statistics and the used data content instance of replication strategy determining section;
Fig. 4 is the synoptic diagram of input information statistics storage format example;
Fig. 5 is the synoptic diagram of replication strategy knowledge content example;
Fig. 6 is for pressing the synoptic diagram of URL replication intervals content instance one by one;
Fig. 7 is the synoptic diagram of reproducting content URL example;
Fig. 8 is the synoptic diagram of reproduced content data example;
Fig. 9 is for explaining the process flow diagram of request relay process among first embodiment;
Figure 10 is for explaining the definite process flow diagram of handling of replication strategy among first embodiment;
The process flow diagram of Figure 11 for explaining that copy update is handled among first embodiment;
Figure 12 is the synoptic diagram of the used contents attribute information instances of acquisition request second embodiment of the invention;
Figure 13 is the synoptic diagram of acquisition request whole contents example;
Figure 14 is for explaining the process flow diagram of request relay process among second embodiment;
Figure 15 is the block diagram that comprises the network system layout example of acting server, has used the information relay device according to third embodiment of the invention on the acting server;
Figure 16 is the synoptic diagram that duplicates target url data structure example among the 3rd embodiment;
Figure 17 is the synoptic diagram of the data structure instance of reproduced content data among the 3rd embodiment;
Figure 18 is for explaining the process flow diagram of request relay process among the 3rd embodiment;
Figure 19 duplicates the process flow diagram that target registered is handled for explaining among the 3rd embodiment;
Figure 20 is for explaining the process flow diagram that duplicates distribution process among the 3rd embodiment;
The process flow diagram of Figure 21 for explaining that the registration deletion is handled among the 3rd embodiment;
Figure 22 is the block diagram of file server system integral layout example, and it has used the information relay device according to fifth embodiment of the invention;
Figure 23 is the block diagram according to the information relay device of sixth embodiment of the invention;
Figure 24 is the synoptic diagram of the data of storing in the system information statistics;
Figure 25 is for explaining Figure 24 discal patch purpose synoptic diagram; And
Figure 26 is the synoptic diagram that is stored in the knowledge in the replication strategy knowledge.
Embodiments of the invention are below described.
(first embodiment)
Fig. 1 is the block diagram that comprises the network system of acting server, has used the information relay device according to first embodiment of the invention on the acting server.
This network system is the Internet, and wherein many server nodes 114 link to each other by public line 121 with client node 101.Client node 101 links to each other with public line 121 by proxy server nodes 103.The content requests that client node 101 sends for server node 114 to proxy server nodes 103.The information relay device 122 of this embodiment is included in the proxy server nodes 103.
In this embodiment, each node 101,103 and 114 is connected to each other.But for the present invention, these nodes interconnect by network and are not absolutely necessary.For example client node 101 and information relay device can the form with software process exist in same computing machine.
Though Fig. 1 shows in node 101,103 and 114 each, the multiple arrangement that has with node 101,103 and 114 identical topology also can exist.Each node 101,103 and 114 is the computer systems with communication function.Hardware resource of each system (for example CPU and storer) and software resource (for example control program) constitute various function implement devices shown in Figure 1.Fig. 1 shows function and implements required various data.These data storage (not shown) in storage area, for example every storer and hard disk that computing machine is interior.
The layout of each unit is below described.
Content-data 116 is the one group of content that sends from content transmission section 115 when the request 117 that receives from client computer or information relay device.Content-data 116 is stored in (not shown) in the storage area.Content-data is represented to discern single content-data and content substance with the combination of ID (URL among the WWW).In the following description, ID is identical with URL.
Fig. 2 shows the URL and the ID example in transmission source.
The form of information shown in Figure 2 is to be included in the content that the identifying informations in the used request msg 117 of client node 101 or 118 obtain with appointment.
The effect of proxy server nodes 103 is equivalent to the agency of client node 101 to finish and communicating by letter of the Internet etc.In this embodiment, the information relay device is included in this server.
At first, input analysis part 104 is analyzed the request 117 of sending from client computer to form input information statistics 105.Input analysis part 104 uses determining section 112 to send all solicited messages to duplicating.
Fig. 3 shows the example of replication strategy determining section 106 used input information statisticss and data content.
Fig. 4 shows the storage format example of input information statistics.
In the data in each clauses and subclauses of Fig. 3, the data among the URL (1), ask request that issuing time (2), total request counting (3) and request occurrence frequency (4) receive according to input analysis part 104 by analyzing or calculating and upgrade recently.The data of duplicating in the usage count (5) increase progressively when duplicating use determining section 112 (following description) use copy.
Replication strategy determining section 106 for example is defined as specific content to duplicate target and determines specific interval, by utilizing input information statistics 105, according to replication strategy knowledge 107, with specific interval copy is updated to nearest state.Replication strategy determining section 106 is determined the result to 108 outputs of content replication intervals subsequently.In this case, replication strategy knowledge 107 is the used knowledge datas of replication strategy determining section 106.This knowledge is preserved with form shown in Figure 5.It should be noted that replication strategy knowledge 107 can be changed by the user.
Fig. 5 shows the example of replication strategy knowledge content.
Below describe replication strategy determining section 106 and determine the mode of replication intervals according to each information in the replication strategy knowledge 107 of Fig. 5.
Replication strategy determining section 106 checks whether the copy of corresponding each URL satisfies the arbitrary process condition of process #1-#4 among Fig. 5.If copy satisfies one of them process condition, the replication intervals that then defines in corresponding process is output to content replication interval 108.In duplicating registration deletion processing, corresponding URL deletes from reproducting content URL109.
Before replication strategy is determined to handle, duplicating utilization rate (6) and determining preservation in the processing in replication strategy determining section 106 calculating charts 3 at strategy.
According to the process # 1 among Fig. 5, be before 3 hours of current time if ask issuing time (2) recently, and duplicate utilization rate (6) that then the replication intervals with URL is set at 5 hours greater than 0.5.Under this condition, 5 hours so long time intervals will be set at interval for underlying cause.Because no matter request frequency is how, unconverted probability is higher but the copy that information relay device 122 is preserved uses always, so but in the server node 114 the change frequency expectability of corresponding contents lower.In other words, compare with the change frequency of content in this case, request frequency is higher.
According to the process # 2 among Fig. 5, be before 3 hours of current time if ask issuing time (2) recently, and duplicate utilization rate (6) that then the replication intervals with URL is set at 2 hours less than 0.5.Under this condition, 2 hours so short time intervals will be set at interval for underlying cause.Because no matter request frequency is how, the utilization rate of the copy that information relay device 122 is preserved is lower, so but in the server node 114 the change frequency expectability of corresponding contents higher.In other words, compare with the change frequency of content in this case, request frequency is lower.
According to the process # 3 among Fig. 5, if request occurrence frequency (4) is greater than 5 in the unit interval, and duplicate utilization rate (6) less than 0.8, then the replication intervals with URL is set at 1/3 of the frequency measurement unit interval.Under this condition, replication intervals is not to set but according to such as the request occurrence frequency with duplicate concept definition the utilization rate as single time interval.And the situation of process # 3 correspondence is that the request occurrence frequency is higher, and server side content changing frequency is higher.
According to the process # 4 of Fig. 5, if, then stop duplicating from current time generation request more than 3 days.In this case, duplicating the registration deletion handles.Replication strategy determining section 106 is deletion and the corresponding relevant message slot of URL from reproducting content URL109, content replication interval 108 and reproduced content data 110 therefore.
It should be noted that the replication strategy knowledge 107 among Fig. 5 is examples of various measurement knowledge sheets, therefore can adopt the another kind of knowledge of measuring.For example can add with condition " if content is fixed or fixing " and duplicate only when satisfying above-mentioned condition, stopping at process #4.In this case, have only, just delete and duplicate registration when the content that generates request and client requests in 3 days not fixedly the time.
Fig. 6 shows the content instance of URL replication intervals one by one.
Reproducting content URL109 is that replication strategy determining section 106 is determined and the conducts of preserving are duplicated and do not had scale content url list.The URL that for example duplicates object content preserves according to form shown in Figure 7.
Fig. 7 shows the example of reproducting content URL.
Reproduced content data 110 is the replication entity corresponding to URL that lists in the reproducting content URL109 and the content that is saved.For example the reproducting content entity is preserved according to form shown in Figure 8.
Fig. 8 shows the example of reproduced content data.
Duplicate the time of using determining section 112 will be included in the content acquisition request 117 and compare, thereby determine whether to return copy or obtain new copy and return data from server node 114 to client computer 101 with the date of expiration or the update time of the content substance of corresponding reproduced content data 110 interior requests.If copy uses determining section 112 to determine to return copy to client node 101, the copy usage count in then relevant with the corresponding URL input information statistics 105 increases progressively.
Request/content translator unit 113 sends content acquisition request 118 and will return client computer 1 node 101 from the content-data of server node 114 to server node 114 according to duplicating the definite result who uses determining section 112 to obtain.If copy uses determining section 112 to determine to return copy, then request/content translator unit 113 returns copy to client node 101.
Request/content translator unit 113 will be stored in from the content-data of server node 114 in copy content-data 110 and the copy content URL109.Request/content translator unit 113 is the content and the URL that newly ask of latest copy and storage/preservations more therefore.
Below by Fig. 9,10 and 11 operation of the information relay device of the present embodiment with above-mentioned layout is described.
Fig. 9 is for explaining the process flow diagram of present embodiment request relay process.
Figure 10 determines the process flow diagram of handling for explaining the present embodiment replication strategy.
Figure 11 upgrades the process flow diagram of handling for explaining the present embodiment copy.
Request relay process, replication strategy are determined to handle and copy renewal processing is the independent asynchronous operation of carrying out.
The request relay process is at first described.
As shown in Figure 9, the request relay process is mainly finished by information relay device 122 when client node 101 issue request msgs 117.
At first, as user during to content display part 102 specified URL, client node 101 output contents show request (step s1).
The demonstration request that the user generates is sent to the input analysis part 104 (step s2) of information relay device 122 with the form from the content acquisition request 117 of content display part 102.
The content of request msg 117 is transfused to analysis part 104 to be analyzed, and the content of input information statistics 105 (1)-(4) are according to the time information renovation (step s3) of request reception.After upgrading the input information statistics (step s3), process flow diagram enters following replication strategy and determines to handle.
Duplicate the date of expiration (step s4) of using determining section 112 to calculate the copy content that is stored in corresponding URL in the copy content-data 110 according to the request content that receives through input analysis part 104 after the step s2 processing.
Can adopt the whole bag of tricks to calculate in this case date of expiration.For example the copy method of using determining section 112 to utilize is, when for example when server node 114 sends contents from being added in the expiration time on the content or changing Time Calculation date of expiration at last.
If the copy content of corresponding requests (step s5) in date of expiration then reads corresponding copy content from request/content translator unit 113.The content that reads is returned client node 101 (step s6) from request/content translator unit 113.
In addition, copy uses determining section 112 to make the copy usage count (5) in the replication strategy determining section 106 increase progressively 1 (step s7).Process flow diagram enters replication strategy subsequently and determines to handle.
If the copy content of corresponding requests expires, perhaps ask at be the content (step s5) of not duplicating, then request/content translator unit 113 is sent to server node 114 according to the server node star request msgs 118 that are included in the request msg 117.Server node 114 is with the content return message relay 122 (step s8) of request msg 118 appointments.
The content of returning from server node 114 is sent to client node 101 (step s9) from the request/content translator unit 113 of information relay device 122, and copy content-data 110 usefulness request/content translator units 113 are finished the same content update (step s10) of processing.The content of not duplicating is stored as the target (content and URL) of newly duplicating of duplicating later on.
It should be noted that after the content of latest copy content-data 110 more (step s10) process flow diagram enters replication strategy and determines to handle.
Below describe replication strategy and determine the process flow diagram of processing.Replication strategy determines that processing starts from after step s3, the s7 or s10 of Fig. 9 request relay process.
After step s3, the s7 or s10 of Fig. 9, replication strategy determining section 106 produces content replication 108 (step t1) at interval according to input information statistics 105 and replication strategy knowledge 107.
Particularly, if adopt as shown in Figure 4 the input information statistics and replication strategy knowledge as shown in Figure 5, then definite replication intervals is as follows.
At first extract the input information statistics of the URL of corresponding requests data 117 appointments.If for example that the request msg appointment is " http: ∥ www.foo.html ", then extract the information of Fig. 4 first row.
The knowledge that replication strategy determining section 106 is calculated copy utilization rate (6) subsequently and the input information statistics condition of extracting is satisfied in retrieval from replication strategy knowledge 107.Suppose that the current time is 1998/09/07/10: 00.In this case, when retrieving the data of Fig. 4 first row, the knowledge matched data of Fig. 5 first row.
Write the replication intervals that the replication intervals that finds in the knowledge is set at corresponding URL, and by replication strategy determining section 106 update content replication intervals 108.
New replication intervals is set in the above described manner.The situation of corresponding other processes described above.
In contrast, point out the end of duplicating if write replication intervals in the knowledge of discovery, then replication strategy determining section 106 from content replication at interval 108, copy content URL109 and corresponding URL and the copy content-data (step t2) of copy content-data 110 deletions.
Can stop duplicating with following another kind of method.If reproduced content data 110 is greater than preliminary dimension, then by omitting the little content of necessity by the priority information (not shown) of content from duplicate target.For example adopt and ask issuing time recently as priority information.The user also can set right of priority in addition.In this case, can delete copy content etc. by utilizing as the proxy server nodes 103 of deletion low priority copy.
The rule-based method of definite replication intervals has been described in this embodiment.But the form of input information statistics and replication strategy knowledge are not limited to this method, for example can calculate replication intervals by the multivariable analysis of input information statistics.
Below describe copy and upgrade the process flow diagram of handling.Copy upgrades to handle with request relay process and replication strategy determines to handle asynchronous carrying out.
At first, copy more new portion 111 will be stored in last doubling time in the copy content URL109 replication intervals in 108 will be relatively at interval with being stored in content replication.If the current time of a URL is replication intervals or multi-compartment more after the last doubling time, then copy update part 111 is passed on part 113 requests from server node 114 download content corresponding to request/content.
Request/content is passed on part 113 and is downloaded contents, and copy content-data 110 is downloaded data and replaces, thus latest copy (step u1) more.
After copy upgraded, copy more new portion 111 stopped preset time at interval, and the interior processing (step u2) of repeating step u1 subsequently.
As mentioned above, according to the information relay device of this embodiment of the invention have copy more new portion 111 with by with the asynchronous execution replication processes of request relay process advancing updating copy content.Therefore, can improve nearest copy content and be kept at the interior probability of information relay device, and can improve the hit rate of client requests.
This device also has replication strategy determining section 106 with according to request frequency increase/minimizing copy object content.For this reason, when finite capacity, the high content of radiation client requests frequency in the copy storage area.This can the undefined content acquisition request of client computer hit rate.
According to common pushing away (Castanet etc.) platform, have only predetermined content to be treated to and push away target, so the prior art variation of processing client side request neatly.In contrast, according to the present invention, be not automatically made and push away target owing to be included in contents in the copy content-data 110, so can realize cache handles (duplicating) flexibly.
In addition, according to the common platform that pushes away, in order to ensure the safety of cache area, must be manually from pushing away all unwanted contents of object removal.In contrast, according to the present invention, owing to each content is removed from push away target automatically according to priority settings, so can not overflow (copy content-data 110) in the cache area.
(second embodiment)
In first embodiment, when copy used determining section 112 to determine that copy has expired, request 117 was unconditionally transferred to server node 114 as request 118.
In contrast, present embodiment by check the copy content whether consistent with original paper content on the server node avoid downloading from server node 114 do not need content.
The information relay device of present embodiment has the layout identical with first embodiment, passes on the processing that part 113 finishes except having revised request/content.
Request/content is passed on part 113 and is had the layout identical with first embodiment.In addition, when when server node 114 is downloaded contents, request/content is passed on part 113 and is at first only obtained contents attribute information, and only obtains whole contents according to contents attribute information in the copy content when not being nearest.
Prepared shown in Figure 12 and 13 content of two types of contents as request msg 118.
Figure 12 shows the request example that only obtains used contents attribute information in the second embodiment of the invention.Request among Figure 12 shows that request type is that " only being attribute information " and URL are " http: ∥ www.aaa.bbb/foo.html ".
In this case, the attribute information of content comprises at least " the last transformation period of content (if content is a fresh content, then being formation time) ".
Figure 13 shows the request example that obtains whole contents.
Request among Figure 13 shows that request type is that " whole contents " and URL are " http: ∥ www.aaa.bbb/foo.html ".
Request/content is passed on part 113 the change frequency information of original paper content is added input information statistics 105.For example by under establish an equation and obtain this information:
Change frequency information=whole contents is obtained request counting/contents attribute and is obtained the request counting
Below by Figure 14 the operation of the present embodiment information relay device with above-mentioned layout is described.
Figure 14 is for explaining the process flow diagram of request relay process in the present embodiment.
In the operation of this embodiment, to compare with first embodiment, the request relay process changes.
If the copy content in date of expiration, is then carried out the processing (step v1-v7) similar to first embodiment.Because the step s1-s7 among Fig. 9 is consistent with step v1-v7, so repeat no more.
Expire (step v5) if determine copy, then request/content translator unit 113 sends contents attributes to server node 114 and obtains and ask 118 attribute informations (step v8) to obtain corresponding contents.
The last transformation period that request/content translator unit 113 will be included in the attribute information that obtains compares to check that whether the original paper content is than copy new (step v9) with the last doubling time of corresponding copy.
Than copy new (step v9), then obtain all the elements (step v10) if determine the original paper content from server, and latest copy content-data 110 more.In addition, change the input information statistics relevant with URL.
After obtaining all the elements (step v10), corresponding content is returned client node (step v12).
If determine that in step v9 last doubling time is later than the last change time, determine that then copy is consistent with nearest original paper content, and the copy content returned client node 101 (step v13).After this, the copy usage count increases progressively (step v14).
As mentioned above, owing to be designed to check that according to the information relay device of present embodiment of the present invention the copy content is whether consistent with original paper content on the server node, so can avoid downloading unwanted content from server node 114.Even therefore can be contemplated that and after date of expiration, also shorten the not corresponding time of changing content.
In addition, owing to can adjust replication intervals, upgrade at interval and can suitably set according to probability so clearly do not set the copy of the content of date of expiration according to the renewal frequency of original paper content.This makes that must obtain all the elements during the request relay process becomes difficult.
Only be described in the present embodiment, with to the relevant processing of the preliminary request of attribute information by the situation that receives request 117 from client node 101.But with not only can be used for the copy relay process to the relevant processing of the preliminary request of attribute information, and can be used for copy and upgrade to handle.In this case, when copy more new portion 111 determine that copies should upgrade, produce the preliminary request of attribute information, and only when content changing, just download content corresponding.
(the 3rd embodiment)
So-called intelligent pull technology is applied to first and second embodiment.But the 3rd embodiment adopts push technology.Relevant with this push technology, many throwings technology is applied to asking/and communication path between content translator unit and the content transmission section be so that server node can initiatively send data to a plurality of information relay devices.
Figure 15 is the block diagram that comprises the network system layout example of acting server, and the information relay device of third embodiment of the invention is applied to acting server.Though the information relay device 203 among Figure 15 is included in the acting server, owing to the relation between two unit is basically the same as those in the first embodiment, so no longer describe acting server.
Because the relation in the present embodiment between the used network itself, so the basic function of client node 201, proxy server nodes and server node 211 and these unit is identical with each node 101,103 and 114 among first embodiment, repeats no more herein.
Client node 201 has the layout identical with client computer 101.The request msg 208 that sends from client node 201 is identical with request msg 117.
Information relay device 203 is preserved in the memory storage (not shown) and is duplicated target URL206, copy content-data 207, replication strategy knowledge 221 and input information statistics 222.This device comprises that copy uses determining section 204, request/content translator unit 205 and deletes determining section 223 according to the registration that these data and request msg 208 are carried out predetermined process.
Be present in and duplicate among the target URL206 if be included in URL contents in the request msg 208, then copy uses determining section 204 to return client node from the corresponding contents of copy content-data 207.If content does not exist, then copy uses determining section 204 that corresponding URL is added and duplicates target URL206, and the request 209 that will register is delivered to server node 211 as the new object content that duplicates.
Copy uses determining section 204 also to preserve the input information statistics 222 of nearest request issuing time as each URL according to request msg 208.
Request/content translator unit 205 only writes down on reproduced content data 207 from the URL content of the content-data 210 of server node 211 transmissions, and it is registered in duplicating target URL206.
Duplicate target URL206 and be information relay device 203 with the URL content as the data area of duplicating target record.For example, this zone has data structure shown in Figure 16.
Figure 16 shows the data structure instance of duplicating target URL in the present embodiment.
Reproduced content data 207 is data areas of record reproducting content.For example, this zone has data structure shown in Figure 17.
Figure 17 shows the data structure instance of reproduced content data in the present embodiment.
Replication strategy knowledge 221 is meant the data of the deleted condition of copy content in the system content-data 207 of giving instructions in reply.This condition is " nearest request produced preceding 3 days of current time ", " nearest request does not have convention in generation of preceding 3 days of current time and corresponding URL " etc.
Registration deletion determining section 223 is determined delete the URL of registration according to the nearest request issuing time of input information statistics 222 and the registration deletion condition of replication strategy indication 221.If registration deletion determining section 223 determines delete the registration of given copy content, then from duplicate target URL206 and copy content-data 207, delete corresponding data, and will register the data of deleting and deliver to server node 211.
Server node 211 is preserved content-data 214, duplicates target URL216 and is duplicated destination device name 217 in the memory storage (not shown), and content send part 212, upgrade test section 213 with carry out the prior defined procedure relevant with these data duplicate target URL registration/deletion 215.
Duplicate target URL registration/deletion 215 registration packet in duplicating target URL216 and be contained in the URL that asks in 209, and log-on message relay name is as the transmission source of duplicating the request 209 in the destination device name 217.
Receive duplicate the target request from the deletion of the registration of information relay device 203 deletion determining section 223 after, duplicate target URL registration/deletion 215 deletion and be included in URL in the data 224 of self-replication target URL216, and from duplicate destination device name 217 the corresponding data of deletion.
Duplicating target URL216 is from the url list of server node 211 to the content that is used to duplicate of information relay device 203 transmissions.When a plurality of information relay devices 203 receive request msgs 209, data are independent of each information relay device and record.For example these data have the form of unanimity shown in Figure 16.
Content-data 214 is one group of correspondence content-datas by the former event data of server node 211 preservations.
Upgrade the variation that test section 213 is detected in the content-data 214.If in duplicating target URL, detect variation, then upgrade test section 213 and send URL and content-data entity to content transmission section 212.
As detect upgrading the method that content-datas change in the test section 213, below several be conspicuous:
A. the recent renewal time of checking at interval all the elements at the fixed time is to seek the content of renewal after supervision time last time.
B. when record on content-data 214 during update content, be used for the renewal test section 213 of tool notification corresponding information of update content.
If C. OS or hardware have the function of data variation on the detection of stored unit, then when detecting data variation, with corresponding information update notifications test section 213.
Content transmission section 212 is with one group of URL and come the content of self refresh test section 213 to be sent to all information relay devices 203 of registering in duplicating destination device name 217.
Below by Figure 18,19,20 and 21 operation according to the information relay device of present embodiment with above-mentioned layout is described.
Figure 18 is for explaining the process flow diagram of request relay process in the present embodiment.
Figure 19 duplicates the process flow diagram that target registered is handled for explaining among the 3rd embodiment.
Figure 20 is for explaining the process flow diagram that duplicates distribution process among the 3rd embodiment.
The process flow diagram of Figure 21 for explaining that the registration deletion is handled among the 3rd embodiment.
Process is carried out as sequence of operations shown in Figure 18 and 19.But process shown in Figure 20 and 21 is independently to carry out.
Operating process shown in Figure 18 and 19 is below at first described.
Identical among processing in the step w1 and Fig. 9 step s1.
Copy uses determining section 204 to receive request msg 208 (step w2) and check whether the URL that this request comprises has registered (step w3) in duplicating target URL206 from client node 201.
If URL registers (step w3), then copy use determining section 204 returns the copy of copy content-data 207 to client node 201 (step w4).Termination subsequently.
If URL unregistered (step w3), then the URL that comprises of request is added into and duplicates target URL206 (step w5).In addition, registration is duplicated target URL and is obtained requests for content and is sent to server node 211 (step w6).
The content transmission section 212 of server node 211 will be asked the URL content return message relay 203 that comprises in 209, and content further is sent to client node 201 (step w7) from information relay device 203.
As shown in figure 19, carrying out the copy target registered after this request relay process handles.
At first, be included in the URLs of request in 209 be transferred into duplicate target URL registration/deletion 215 and add server node 211 duplicate target URL (step x1).In addition, duplicating target URL registration/deletion 215 will ask the identification name of 209 transmission source apparatus to add to duplicate in the destination device name 217 (step x2).
The copy distribution process is below described.
At first, upgrade the formation (step y1) that content-data 214 interior content change or fresh content are detected in test section 213.
Upgrading test section 213 checks whether the content-data that has detected variation is included in and duplicates in the target URL216 (step y2).
If determine content-data for duplicating target, then content transmission section 212 sends content-data 210 (step y3) to the device that is duplicating registration in the destination device name 217.Utilize many throwings technology to finish transmission initiatively to send data to a plurality of information relay devices 203 from server node.Figure 15 shows one of them information relay device 203.
In information relay device 203, whether the URL of the content-data 210 that 205 inspections of request/content translator unit send is included in and duplicates in the target URL206 (step y4).If being included in, duplicates in the target URL206 URL, then by content-data 210 latest copy content-data 207 (step y5) more.
Like this, the copy target is registered in server node 211 by copy target registered processing and utilizing push technology.The copy target is also distributed to information relay device 203 by the copy distribution process according to the URL that registers.
For the target URL quantity of duplicating that prevents registration in the server node 211 excessively increases, information relay device 203 is carried out the registration deletion and is handled.
In registration deletion shown in Figure 21 was handled, registration deletion determining section 223 at first begins the registration deletion to be judged, and read the nearest request issuing time of input information statistics 222 and the registration deletion condition (step z1) of replication strategy knowledge 221.
Check according to the issuing time of request recently whether each URL satisfies registration deletion condition (step z2) subsequently.
If define a URL who satisfies registration deletion condition, then duplicate target URL206 and the copy content-data 207 deleted (step z3) relevant, and the request that target is duplicated in deletion from duplicate object listing is output to server node 211 (step z4) with this URL.
In server node 211, received from duplicate object listing deletion duplicate target request duplicate 215 deletions of target URL registration/deletion about duplicate target URL216 be included in the data 224 interior relevant message slots (step z5) that duplicate destination device name 217 of URL.
As mentioned above, in information relay device according to present embodiment of the present invention, owing to start replication processes with original paper content change in the responding server node 211, so the copy content-data in the information relay device is new always, and can fast processing from the request of client node.
Common acting server is designed to only preserve the content of obtaining that does not change.If therefore the original paper content update then must transmit content next visit with the response browser from server once more.But in the present invention, because the copy content-data in the information relay device is new always, so the average response time that browser is observed can shorten.
In the present embodiment, when content-data 214 changed on server node 211, the content-data of variation itself was sent to information relay device 203.But the present invention is not limited thereto.For example present embodiment can replace content-data itself with the attribute information that only sends content-data 214 to request/content translator unit 205 when content-data 214 changes with second embodiment combination.Request/content translator unit 205 checks subsequently whether the copy content is nearest.Only when copy is not nearest, the 205 issue requests 118 of request/content translator unit are with latest copy more.
(the 4th embodiment)
In first, second and the 3rd embodiment, described and only duplicated URL and content substance.In the present embodiment, the access control information of each content-data is stored with the copy content.
The information relay device of present embodiment is identical with first to the 3rd embodiment's, except comprising storage control determining section and storage control information be kept in copy content-data 110 and 207.
In this case, the storage control information is for indicating for example information of " user A can see content ".Under this information, but access content can be limited on each user of client node.
Storage control determining section is according to the access of this storage control information limiting content.
Information relay device with present embodiment of aforesaid operations is operated as follows.At first, the request msg that the user ID name is added client computer.
Storage control determining section is with the access control information comparison of registering in the copy content-data in the user ID name of client computer and the information relay device subsequently.The copy content is as a result of only returned the user who allows access.
As mentioned above, in information relay device, owing to content is issued together in company with the access control information that adds, so, with regard to the access control of content demand, can shorten the response time from client's angle according to present embodiment of the present invention.
Equally, according to first to the 3rd embodiment, in order to obtain each user's access control information, must the inquiry server node.
(the 5th embodiment)
In first to fourth embodiment, the information relay device is applied to acting server.But in the present embodiment, the information relay device is applied to file server system.
Figure 22 shows the integral layout example of file server system, is applied to this server system according to the information relay device of fifth embodiment of the invention.
In this system, extensive file server 302 has been installed in general headquarters 301.Server node 114 and 211 among corresponding first to fourth embodiment of this server.Extensive file server 302 is connected with the small-scale file server that is installed in general headquarters' 301 interior door by relatively slow LAN, and links to each other with 306 with the small-scale file server 305 of branch by public line.
These small-scale file servers 303-306 comprise information relay device 122 and 203.
The capacity of each small-scale file server 303-306 is less, can provide fileinfo to the client computer of corresponding department or branch by high-speed lan.When given small-scale server did not have information requested, server sent information request to small-scale file server 302.Content among corresponding first to fourth embodiment of this information.The corresponding URL of document retrieval information.
Extensive file server 302 is stored all information, and sends data according to the request of small-scale file server 303-306.
In having the file server system of this layout, the relation object between client computer, small-scale file server and the extensive file server is similar to the relation between client node, acting server and the server node among first to fourth embodiment.
The information of using with certain frequency of access or higher frequency is stored in the little small-scale file server of capacity that is arranged in department or branch, and the information of visit is not removed from the small-scale file server.
As mentioned above, the file server system according to the information relay device of present embodiment of the present invention has the layout similar to first to fourth embodiment.Even therefore the original file server of the small-scale file server of each part inquiry also can obtain the result identical with first to fourth embodiment.
In the above-described embodiments, the renewal that is stored in the data in the information relay device is determined according to user's information acquisition request at interval.But the present invention is not limited thereto, can determine to upgrade at interval according to the load condition of system.
The situation of determining replication intervals according to the load condition of system is below described.
(the 6th embodiment)
Figure 23 shows the information relay device of sixth embodiment of the invention.Identify identical part among Figure 23 with label identical among Fig. 1, and repeat no more.The layout of Figure 23 and the difference of Fig. 1 are to comprise in addition system state monitor portion 401 and system information statistics 402, and the knowledge of relevant system state is added in the knowledge that is stored in replication strategy knowledge 107.
Referring to Figure 23, the load condition of system state monitor portion 401 surveillances.In this case, the load condition of system is determined according to following numerical value:
1. the CPU availability of server in the unit interval.
2. the Request Processing of server is counted in the unit interval.
3. the CPU availability of unit interval internal information relay.
4. the request of unit interval internal information relay sends counting.
5. receive the required time of request responding from the information relay device to server.
System state monitor portion 401 is obtained above-mentioned numerical value and is determined the load condition of system to utilize following method.
The CPU availability:
Request/transmission counting/Request Processing counting:
401 pairs of request transmissions of part number of times is counted and finish processing in corresponding part.
The response required time:
In the request/content translator unit of information relay device, measurement begins to receiving the required time of response from each request transmission time to server.
The system state value that system state monitor portion 401 utilizes said method to obtain for example is stored in the system information statistics 402 with form shown in Figure 24.Figure 25 is for explaining the synoptic diagram of project shown in Figure 24.
Prepared the knowledge (knowledge for example shown in Figure 26) of definite replication intervals according to the system loading state and measured knowledge 107 as duplicating.
When for example system state monitor portion 401 will monitor the CPU availability of unit interval server, duplicate measurement determining section 106 and determine replication intervals according to the condition in the replication strategy knowledge 107 process #5.Particularly, if the cpu busy percentage of server more than or equal to 80%, then is set at 10 hours with replication intervals.
The present invention can only utilize the mode of the load condition of system to determine replication intervals with the mode of the load condition of the statistical information of utilizing request to generate and system by the statistical information of only utilizing request to generate.
Therefore according to present embodiment, can obtain following effect by adjusting replication intervals according to the load condition of system.
When system loading is heavier, can prevent that the system loading that replication processes causes from excessively increasing by prolonging replication intervals.
When system loading is in the edge, can improve the possibility that nearest copy content exists by frequently finishing replication processes.
Range of application of the present invention is not limited to the Internet and file server system.The present invention also can be applied to various computing machines and the communication system under the situation similar to the aforementioned embodiment.For example the present invention can be applied to FTP etc.
The device of the various embodiments described above can be loaded in the computing machine by the program in the storage medium of will being stored in and realize.
As storage medium of the present invention, so long as can adopt by stored program computer-readable recording medium, for example disk, floppy disk, hard disk, CD (CD-ROM, CD_R, DVD etc.), magneto-optic disk (MO etc.) or semiconductor memory.
OS (operating system), the MW (middleware) such as database management language or network software etc. according to the programmed instruction operation in the computing machine of packing into from storage medium can partly carry out each process that realizes each embodiment on computers.
Storage medium of the present invention not only comprises the medium that is independent of computing machine, and comprises the storage medium of downloading and storing or store temporarily the program that sends by LAN, the Internet etc.
Used storage medium data are not limited to one.Can adopt any storage layout.Storage medium for example of the present invention comprises the medium layout, and wherein a plurality of media of the processing and utilizing in each embodiment are carried out.
Computing machine of the present invention is carried out each process according to the program of storage medium stored, and can take any form, for example comprises the device of personal computer or is connected to each other the system of multiple arrangement by network.
Computing machine among the present invention is not limited to personal computer in addition.For example computing machine comprises processing unit and the microcomputer that is included in the signal conditioning package.That is, term " computing machine " is the generic name that can realize the equipment and the device of function of the present invention according to program.
As mentioned above, according to the present invention, the information relay device that provides has higher original paper content update frequency and can shorten average response time in client computer when the server of uncertain quantity and storage medium output information are obtained request.
For those skilled in that art, can be easy to see other advantages and improvement.Therefore the present invention is not limited to the embodiment of specific detail and representative.Therefore can under the prerequisite of the spirit and scope that do not depart from the claim qualification, make various modifications.
Claims (15)
1. information relay device is characterized in that comprising:
Storage area is used for the data that the storage server computing machine provides;
Upgrade determining section at interval, be used for determining the renewal interval of the data of storage area stored according to predetermined condition;
Duplicate part, be used for duplicating corresponding stored being stored in the described storage area in described storage area at interval from the data of the data of described server computer and with copy data with described described renewal of upgrading that determining section at interval determines; And
Returning part is used for when from client computer reception data acquisition request the described data that partly are stored in described storage area of duplicating being returned client computer.
2. device as claimed in claim 1 is characterized in that determining section, described part and the described returning part of duplicating are included in the acting server with at server computer and utilize relay data between the client computer of data at interval for described storage area, described renewal.
3. device as claimed in claim 1, it is characterized in that describedly upgrading renewal that determining section at interval determines each data at interval, and the described part of duplicating is duplicated corresponding stored being stored in the described storage area from the data of the data of described server computer and with described copy data in described storage area at interval with described described renewal of upgrading that determining section at interval determines.
4. device as claimed in claim 3 is characterized in that describedly upgrading determining section at interval according to the renewal of determining each data from the request frequency that each data is obtained of client computer at interval.
5. device as claimed in claim 3 is characterized in that the described interval determining section of upgrading changes the renewal interval that frequency is determined each data according to data in the described server computer.
6. device as claimed in claim 1 is characterized in that described device comprises that further copy uses determining section, and whether the data that are used for determining the storage area stored when the reception data acquisition request are in date of expiration; And
The described part of duplicating is inquired about the attribute information that is stored in the data in the storage area to server computer, when duplicating when using the determining section specified data within date of expiration, according to determining as the data attribute information of Query Result whether corresponding data are updated on server computer, and when upgrading, specified data obtains data from server computer.
7. device as claimed in claim 1 is characterized in that described storage area further comprises and the relevant memory access restricted information of storage data; And
The client computer return data that returning part is only visited to permission according to access restriction information.
8. device as claimed in claim 3 is characterized in that the described interval determining section is determined each data according to the load on the server the renewal interval of upgrading.
9. device as claimed in claim 3 is characterized in that the described interval determining section is determined each data according to the load on the information relay device the renewal interval of upgrading.
10. device as claimed in claim 3 is characterized in that described information relay device links to each other with server computer by network, and
Upgrade the interval determining section and determine the renewal interval of each data according to network load.
11. an information relay device is characterized in that comprising:
The information relay part; And
Server computer,
Wherein said information relay partly comprises:
Notification section is used for the identifying information announcement server computing machine with the client requests data; And
Returning part is used for the data from server computer are returned client computer; And
Described server computer comprises:
The identifying information storage area, the identifying information that is used for log-on data upgrades operation to monitor, wherein the identifying information partly notified of the further registration notification of identifying information storage area;
The test section, whether the data that are used to detect the identifying information indication of registering in the identifying information storage area are updated; And
Send part, be used for when the test section detects data and is updated, partly sending detected data to described information relay.
12. device as claimed in claim 11 is characterized in that described information relay partly is included in the acting server with at server computer and utilize relay data between the client computer of data.
13. device as claimed in claim 11 is characterized in that described information relay part is notified to the identifying information that is stored in the identifying information storage area according to the data of client requests and the condition relevant with the client requests data with the identifying information of corresponding deleted data; And
The described information storage part identifying information that deletion is notified by the deletion notification section from the registration identifying information.
14. a computer-readable information recording medium, logger computer program on it is characterized in that described program comprises:
Storage area is used for the data that the storage server computing machine provides;
Upgrade determining section at interval, be used for determining the renewal interval of the data of storage area stored according to predetermined condition;
Duplicate part, be used for duplicating corresponding stored being stored in the described storage area in described storage area at interval from the data of the data of described server computer and with copy data with described described renewal of upgrading that determining section at interval determines; And
Returning part is used for when from client computer reception data acquisition request the described data that partly are stored in described storage area of duplicating being returned client computer.
15. a computer-readable information recording medium has write down a computer program on it, it is characterized in that described program comprises:
Pick-up unit, whether the data that are used to detect the identifying information indication of registering in the identifying information storage area are updated, the identifying information of the further log-on message relay portion notice of wherein said identifying information storage area;
Pick-up unit, whether the data that are used to detect the identifying information indication of registering in the identifying information storage area are updated; And
Dispensing device is used for sending detected data to server computer when pick-up unit detects data and is updated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00118732 CN1330328A (en) | 2000-06-16 | 2000-06-16 | Information repeater and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00118732 CN1330328A (en) | 2000-06-16 | 2000-06-16 | Information repeater and storage medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1330328A true CN1330328A (en) | 2002-01-09 |
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ID=4587325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00118732 Pending CN1330328A (en) | 2000-06-16 | 2000-06-16 | Information repeater and storage medium |
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| CN (1) | CN1330328A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101192229B (en) * | 2006-12-01 | 2010-09-22 | 阿里巴巴集团控股有限公司 | Data synchronization method and system |
| CN107704198A (en) * | 2012-12-17 | 2018-02-16 | 联想(北京)有限公司 | The method and electronic equipment of information processing |
| CN111417119A (en) * | 2020-03-16 | 2020-07-14 | 纳瓦电子（上海）有限公司 | Wireless cascading method |
| CN114846460A (en) * | 2019-12-23 | 2022-08-02 | 艾玛迪斯简易股份公司 | System and method for optimizing the transmission of requests for updated content from external data sources |
| US11789932B2 (en) | 2019-12-23 | 2023-10-17 | Amadeus S.A.S. | System and method for optimizing transmission of requests for updated content from external data sources |
-
2000
- 2000-06-16 CN CN 00118732 patent/CN1330328A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101192229B (en) * | 2006-12-01 | 2010-09-22 | 阿里巴巴集团控股有限公司 | Data synchronization method and system |
| CN107704198A (en) * | 2012-12-17 | 2018-02-16 | 联想(北京)有限公司 | The method and electronic equipment of information processing |
| CN114846460A (en) * | 2019-12-23 | 2022-08-02 | 艾玛迪斯简易股份公司 | System and method for optimizing the transmission of requests for updated content from external data sources |
| US11789932B2 (en) | 2019-12-23 | 2023-10-17 | Amadeus S.A.S. | System and method for optimizing transmission of requests for updated content from external data sources |
| CN111417119A (en) * | 2020-03-16 | 2020-07-14 | 纳瓦电子（上海）有限公司 | Wireless cascading method |
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