WO2013097076A1 - Procédé et dispositif pour la gestion de mémoires cache - Google Patents

Procédé et dispositif pour la gestion de mémoires cache Download PDF

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Publication number
WO2013097076A1
WO2013097076A1 PCT/CN2011/084652 CN2011084652W WO2013097076A1 WO 2013097076 A1 WO2013097076 A1 WO 2013097076A1 CN 2011084652 W CN2011084652 W CN 2011084652W WO 2013097076 A1 WO2013097076 A1 WO 2013097076A1
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WO
WIPO (PCT)
Prior art keywords
content
clicks
cache
heating speed
unit
Prior art date
Application number
PCT/CN2011/084652
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English (en)
Chinese (zh)
Inventor
王凤
陆海翔
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201180002988.XA priority Critical patent/CN103380611B/zh
Priority to PCT/CN2011/084652 priority patent/WO2013097076A1/fr
Publication of WO2013097076A1 publication Critical patent/WO2013097076A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/56—Provisioning of proxy services
    • H04L67/568—Storing data temporarily at an intermediate stage, e.g. caching

Definitions

  • the present invention relates to the field of cache technologies, and in particular, to a cache management method and device.
  • cache can cache some hot content (such as audio and video) to a proxy server that is closer to the user. This not only reduces the load on the source server and reduces the bandwidth consumption of the backbone network, but also accelerates. Respond to users, thereby enhancing the user experience.
  • the proxy server usually uses the Cache algorithm to identify hotspot content.
  • a typical Cache algorithm is the LFU (Least Frequently Used) algorithm.
  • the LFU algorithm uses the number of clicks of the content as the heat value. The greater the heat value, the higher the hotspot of the content. Conversely, the hotspot of the content is more low.
  • the LFU algorithm uses the number of clicks of the content as the popularity value, so that the content that has been accessed many times in the past and is rarely accessed is still presumed to be hot content, and the value of the content cannot be well weighed.
  • the embodiment of the invention provides a cache management method and device, which can more completely balance the value of the content.
  • a cache management method including:
  • a product of the heating speed weight of the content and the current number of clicks is calculated to obtain a heat value of the content.
  • a cache management device comprising:
  • a receiving unit configured to receive a content request message that is sent by the client and carries the content identifier
  • An obtaining unit configured to obtain the content identifier from the content request message, where the first determining unit is configured to determine whether content corresponding to the content identifier is cached in the cached hard disk;
  • a sending unit configured to send the content to the client when the determination result of the first determining unit is yes;
  • An update unit configured to update a click count of the content to obtain a current click count of the content
  • a first calculating unit configured to calculate a heating speed weight of the content according to recent access information of the content, where the heating speed weight is used to indicate a recent degree of heating of the content;
  • a second calculating unit configured to calculate a product of a heating speed weight of the content and a current number of clicks to obtain a heat value of the content.
  • the heat value of the Cache content is obtained by calculating the product of the heating speed weight of the Cache content and the current number of clicks, and the heating speed weight of the Cache content is used to indicate the recent warming degree of the Cache content. That is to say, when weighing the value of the Cache content, the embodiment of the present invention considers not only the current number of clicks of the Cache content (that is, considering the long-term nature of the Cache content), but also considers the heating speed weight of the Cache content (ie, considering The locality of the Cache content, so that the value of the content can be more comprehensively balanced, which is conducive to improving the cache hit rate.
  • FIG. 1 is a flowchart of a cache management method according to an embodiment of the present invention
  • FIG. 2 is a flowchart of another cache management method according to an embodiment of the present invention.
  • FIG. 3 is a structural diagram of a cache management device according to an embodiment of the present invention.
  • FIG. 4 is a structural diagram of another cache management device according to an embodiment of the present invention.
  • FIG. 5 is a structural diagram of still another cache management device according to an embodiment of the present invention. detailed description
  • the embodiment of the invention provides a cache management method and device, which can more comprehensively balance the value of the content, and is beneficial to improving the cache hit rate. The details are described below separately.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • FIG. 1 is a flowchart of a cache management method according to Embodiment 1 of the present invention.
  • the cache management method shown in FIG. 1 can be applied to a video on demand (VOD) system, and can be applied to other systems, which is not limited in the embodiment of the present invention.
  • the method can include the following steps:
  • the content request message carrying the content identifier sent by the client may be received by the proxy server.
  • the content identifier is used to distinguish content, and the content identifiers of different content are different.
  • the client may be a computer, a mobile phone, a personal digital assistant (PDA), a laptop computer, or the like, which is not limited in the embodiment of the present invention.
  • PDA personal digital assistant
  • the proxy server may obtain the content identifier from the content request message, and determine that the content corresponding to the content identifier is cached in the Cache hard disk, and then directly send the content to the client.
  • the proxy server may add 1 to the number of clicks of the content corresponding to the content identifier to obtain the current number of clicks of the content.
  • the proxy server updates the number of clicks of the content corresponding to the content identifier
  • the number of clicks of the content corresponding to the content identifier may also be Adding n, n is a natural number greater than 1, which is not limited in the embodiment of the present invention.
  • the proxy server may calculate the heating speed weight of the content according to the recent access information of the content.
  • the embodiment of the present invention will be described in detail through a specific embodiment.
  • the proxy server may calculate a product of the heating speed weight of the content and the current number of clicks to obtain a heat value of the content.
  • the heat value of the Cache content is obtained by calculating the product of the heating speed weight of the Cache content and the current number of clicks, and the heating speed weight of the Cache content is used to indicate the recent warming degree of the Cache content. That is to say, in the embodiment of the present invention, when weighing the value of the Cache content, not only the current number of clicks of the Cache content (ie, the long-term nature of the Cache content) but also the heating speed weight of the Cache content (ie, the local part of the Cache content) is considered. Sex), so that the value of the content can be more comprehensively balanced, which is conducive to improving the cache hit rate.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • FIG. 2 is a flowchart of a cache management method according to Embodiment 2 of the present invention.
  • the cache management method shown in FIG. 2 can also be applied to the VOD system, and can also be applied to other systems, which are not limited in the embodiment of the present invention.
  • the Cache may include a Cache hard disk and a Cache memory.
  • the Cache hard disk is used to cache hotspot content whose heat value exceeds the threshold of the Cache hard disk.
  • the hot content in the Cache hard disk can provide services for the user for a long time, and the Cache memory is used to cache some hot values not exceeding the Cache hard disk.
  • the content of the threshold; the contents of the Cache memory can temporarily serve the user.
  • the Cache not only records the recent access information of the hot content in the Cache hard disk, but also records the recent access information of the content in the Cache memory.
  • the method may include the following steps:
  • the proxy server receives a content request message that is sent by the client and carries the content identifier.
  • the proxy server obtains the content identifier from the content request message. 203. The proxy server determines whether the content corresponding to the content identifier is cached in the Cache hard disk. If yes, steps 204 to 207 are performed, and the process ends; if no, step 208 is performed.
  • the proxy server sends the content corresponding to the content identifier to the client.
  • the proxy server determines that the content corresponding to the content identifier is cached in the cache hard disk, the cache is hit, and the proxy server can directly send the content corresponding to the content identifier to the client to provide content services for the client. .
  • the proxy server updates the number of clicks of the content corresponding to the content identifier to obtain the current number of clicks of the content.
  • the proxy server calculates a heating speed weight of the content according to the recent access information of the content, where the heating speed weight is used to indicate the recent heating degree of the content.
  • the proxy server calculates a product of a heating speed weight of the content and a current number of clicks to obtain a heat value of the content.
  • the proxy server determines whether the recent access information of the content is recorded. If yes, steps 205 ⁇ 207 and 209 are performed; if no, steps 212-211 are performed, and the process ends. If yes, go to step 210 and end the process; if no, go to step 211 and end the process.
  • the proxy server requests the source server to deliver the content, caches the content delivered by the source server to the Cache hard disk, and sends the content to the client.
  • the proxy server is connected to the source server through the backbone network. Therefore, the proxy server can request the source server to deliver the content through the backbone network, and receive the content delivered by the source server through the backbone network, and cache the content to the cache hard disk, and Send the content to the client.
  • the proxy server can directly cache the content delivered by the source server to the Cache hard disk. If the Cache hard disk space is insufficient, the proxy server can replace the content delivered by the source server with the Cache hard disk. The hot content with the lowest heat value.
  • the proxy server requests the source server to deliver the content, caches the content delivered by the source server into the cache memory, and sends the content to the client.
  • the proxy server requests to record recent access information of the content.
  • the heat value of the Cache content is calculated by heating the Cache content.
  • the speed weight is multiplied by the current number of clicks, and the heating speed weight of the Cache content is used to indicate the recent warming of the Cache content. That is to say, in the embodiment of the present invention, when weighing the value of the Cache content, not only the current number of clicks of the Cache content (ie, the long-term nature of the Cache content) but also the heating speed weight of the Cache content (ie, the local part of the Cache content) is considered. Sex), so that the value of the content can be more comprehensively balanced, which is conducive to improving the cache hit rate.
  • the proxy server may calculate the heating speed weight of the content according to the recent access information of the content requested by the client, and the heating speed weight is used to indicate how the server accesses the recent information according to the content. Calculate the heating speed weight of the content.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • a method for calculating a heating speed weight of a content based on recent access information of the content provided in Embodiment 3 of the present invention can record the number of clicks of each content (including the hot content cached by the Cache hard disk and the cached cached content) in the recent N cycles, and N is greater than 1; that is, each said The recent visit information of a content may include the number of clicks of the content in the recent N cycles.
  • the proxy server may first calculate the average number of clicks of all the contents in the Cache in the recent N cycles, and use the average number of clicks as the reference click number; Calculating a difference in the number of clicks of the content in the recent N cycles relative to the number of clicks of the reference click; and obtaining the heating of the content from the correspondence between the difference in the number of clicks and the weight of the heating speed according to the difference in the number of clicks Speed weight.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • the Cache may define a period T (the value of T may not be too large), and respectively use a two-dimensional array to record the number of clicks of each content in the previous period and the number of clicks in the current period. . That is to say, the recent access information of each content may include the number of clicks of the current period of the content and the number of clicks of the previous period. For each content, the Cache can also start timing.
  • the Cache can clear the number of clicks of the previous previous period, and start recording the number of clicks of the current period, and the click of the original current period. The number of times has changed to the number of clicks in the previous cycle.
  • T where ⁇ denotes the period and t denotes the time of the current period running, and the value is (0, ⁇ ), where the number of hits in the current period is the number of hits from the beginning of the period to the time t.
  • the content is accelerating and heating up, so it should be assigned a larger heating speed weight; Otherwise, the content is getting colder, so a smaller heating speed weight should be assigned.
  • Embodiment 5 is a diagrammatic representation of Embodiment 5:
  • the recent access information of each content includes the first clicked time Tf, the recently accessed time Tr, and the number of clicked times of the content. Counter , where Counter is greater than 1.
  • the proxy server may first calculate the difference between the current time Tc and Tr to obtain the time interval Tlast of the content from the recently accessed time to the current time;
  • the formula (Tr-Tf ) I ( Counter- 1 ) calculates the average time interval Tave that the content was visited in the past; when Tlast ⁇ Tave, it indicates that the access frequency of the content is getting higher and higher, and the content is in the heat rising stage, The content is assigned a larger heating speed weight, so the proxy server can calculate the heating speed weight of the content according to the formula Tave/Tlast.
  • Tlast>Tave it indicates that the access frequency of the content is getting lower and lower, the content is in the stage of heat degradation, and the content should be assigned a smaller heating speed weight, so the proxy server can calculate the content according to the formula Tave/Tlast. The strength of the heat of the mouth is weighted.
  • FIG. 3 is a schematic diagram of a cache management device according to an embodiment of the present invention.
  • the cache management device provided in Embodiment 6 of the present invention can be used as a standalone device or as a newly added part of the existing proxy server for implementing Cache management.
  • the cache management device can include:
  • the receiving unit 301 is configured to receive a content request message that is sent by the client and carries the content identifier.
  • the obtaining unit 302 is configured to obtain a content identifier from the content request message.
  • the first determining unit 303 is configured to determine whether content corresponding to the content identifier is cached in the Cache hard disk.
  • the sending unit 304 is configured to send the content to the client when the determination result of the first determining unit 303 is YES.
  • the updating unit 305 is configured to update the clicks of the content to obtain the current number of clicks of the content.
  • the first calculating unit 306 is configured to calculate a heating speed weight of the content according to the recent access information of the content, wherein the heating speed weight is used to indicate the recent heating degree of the content.
  • the second calculating unit 307 is configured to calculate a product of the heating speed weight of the content and the current number of clicks to obtain a heat value of the content.
  • the cache management device provided in Embodiment 6 of the present invention may further include: a second determining unit 308, configured to: when the determination result of the first determining unit 303 is negative, determine whether the recent access of the content is recorded.
  • the notification update unit 305 performs a number of clicks to update the content to obtain the current number of clicks of the content; and notifies the first calculation unit 306 to perform a calculation of the heating speed weight of the content based on the recent access information of the content; And notifying the second calculation unit 307 to perform a calculation of a product of the heating speed weight of the content and the current number of clicks to obtain a heat value of the content.
  • the third determining unit 309 is configured to determine whether the heat value obtained by the second calculating unit 307 exceeds a threshold for entering the Cache hard disk.
  • the requesting unit 310 is configured to: when the determination result of the third determining unit 309 is YES, request the source server to deliver the content, and cache the content delivered by the source server to the Cache hard disk.
  • the sending unit 304 is further configured to send the content delivered by the source server cached by the requesting unit 310 to the Cache hard disk to the client.
  • the requesting unit 310 is further configured to: when the determining result of the third determining unit is negative, requesting the source server to deliver the content, and buffering the content delivered by the source server into the Cache memory; correspondingly, sending The unit 304 is further configured to send the content delivered by the source server cached by the request unit 310 to the Cache memory to the client.
  • the cache management device provided in Embodiment 6 of the present invention may further include:
  • the recording unit 311 is configured to record the recent access information of the content when the determination result of the second determining unit 308 is negative; accordingly, the requesting unit 310 is further configured to: after the recording unit 311 records the recent access information of the content, request The source server delivers the content, and caches the content delivered by the source server to the cache memory.
  • the updating unit 305 is specifically configured to add 1 to the number of clicks of the content to obtain the current number of clicks of the content.
  • the recent access information of the content includes the number of clicks of the current period of the content and the number of clicks of the previous period.
  • ⁇ indicates the period, indicating the time of the current period running, and the value is (0, ⁇ ).
  • FIG. 4 is a schematic diagram of another cache management device according to Embodiment 6 of the present invention.
  • the cache management device shown in FIG. 4 is optimized by the cache management device shown in FIG. 3.
  • the recent access information of the above content includes the number of clicks of the content in a recent period, where ⁇ is greater than 1.
  • the first calculating unit 306 may include: a first module 3061, configured to calculate an average number of clicks of all contents in the Cache hard disk in a recent period, and use the average number of clicks as a reference click number;
  • a second module 3062 configured to calculate a difference in the number of clicks of the content in the recent N cycles relative to the reference clicks
  • the third module 3063 is configured to obtain, according to the difference in the number of clicks, the heating speed weight of the content from the correspondence between the difference in the number of clicks and the weight of the heating speed.
  • the updating unit 305 is specifically configured to add 1 to the number of clicks of the content to obtain the latest number of clicks of the most recent N cycles of the content; N is greater than 1.
  • FIG. 5 is a block diagram of another cache management device according to Embodiment 6 of the present invention.
  • the cache management device shown in FIG. 5 is optimized by the cache management device shown in FIG. 3.
  • the recent access information of the above content includes the first clicked time Tf, the recently accessed time Tr, and the number of clicked counters Counter, Counter is greater than 1.
  • the first calculating unit 306 can include:
  • a fourth module 3064 configured to calculate a difference between the current time Tc and the Tr, to obtain a time interval Tlast of the content from the recently accessed time to the current time;
  • a fifth module 3065 configured to calculate an average time interval Tave that the content was visited in the past according to the formula (Tr-Tf) I (Count-1);
  • the sixth module 3066 is configured to calculate the heating speed weight of the content according to the formula Tave/Tlast when Tlast ⁇ Tave; or to calculate the heating speed weight of the content according to the formula Tave/Tlast when Tlast>Tave.
  • the heat value of the Cache content is obtained by calculating a product of the heating speed weight of the Cache content and the current number of clicks, and the heating speed weight of the Cache content is used to indicate the Cache content in the near future. The degree of heat.
  • the cache management device provided in Embodiment 6 of the present invention not only considers the current number of clicks of the Cache content (that is, considers the long-term nature of the Cache content), but also considers the heating of the Cache content when weighing the value of the Cache content.
  • Speed weight that is, considering the locality of the Cache content
  • the program can be stored in a computer readable storage medium.
  • the storage medium can include: Flash drive, Read-Only Memory (ROM), Random Access Memory (RAM), disk or CD.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
  • Information Transfer Between Computers (AREA)

Abstract

L'invention concerne un procédé et un dispositif pour la gestion de mémoires cache. Le procédé comprend : la réception d'un message de demande de contenu portant un identifiant de contenu envoyé à partir d'un client ; l'acquisition de l'identifiant de contenu à partir du message de demande de contenu, et l'évaluation si un contenu correspondant à l'identifiant de contenu est mis en mémoire cache dans un disque de mémoire cache, et dans l'affirmative, l'envoi du contenu au client ; la mise à jour des clics du contenu, pour obtenir les clics actuels du contenu ; le calcul d'une pondération de vitesse d'échauffement du contenu selon des informations d'accès récentes du contenu, la pondération de vitesse d'échauffement indiquant une proportion dans laquelle le contenu s'est récemment échauffé ; et le calcul du produit de la pondération de vitesse d'échauffement du contenu et des clics actuels, pour obtenir une valeur d'échauffement du contenu. Grâce à l'invention, la valeur d'un contenu peut être complètement pondérée, ce qui est bénéfique pour améliorer le taux de réussite de mémoire cache.
PCT/CN2011/084652 2011-12-26 2011-12-26 Procédé et dispositif pour la gestion de mémoires cache WO2013097076A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201180002988.XA CN103380611B (zh) 2011-12-26 2011-12-26 一种缓存管理方法及设备
PCT/CN2011/084652 WO2013097076A1 (fr) 2011-12-26 2011-12-26 Procédé et dispositif pour la gestion de mémoires cache

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Application Number Priority Date Filing Date Title
PCT/CN2011/084652 WO2013097076A1 (fr) 2011-12-26 2011-12-26 Procédé et dispositif pour la gestion de mémoires cache

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Cited By (1)

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CN105516346A (zh) * 2015-12-30 2016-04-20 广东欧珀移动通信有限公司 一种缓存策略的解析方法及装置

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CN104270456B (zh) * 2014-10-14 2018-03-30 中国科学院计算技术研究所 基于内容标识的互联网缓存应答系统及其方法
CN111046015A (zh) * 2018-10-12 2020-04-21 中国移动通信集团重庆有限公司 数据处理方法、装置、设备和介质
CN111372095B (zh) * 2018-12-25 2023-06-23 深圳市茁壮网络股份有限公司 一种计算热度的方法及装置

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