WO2017167039A1 - 数据缓存的方法及装置 - Google Patents
数据缓存的方法及装置 Download PDFInfo
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- WO2017167039A1 WO2017167039A1 PCT/CN2017/077241 CN2017077241W WO2017167039A1 WO 2017167039 A1 WO2017167039 A1 WO 2017167039A1 CN 2017077241 W CN2017077241 W CN 2017077241W WO 2017167039 A1 WO2017167039 A1 WO 2017167039A1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/95—Retrieval from the web
- G06F16/957—Browsing optimisation, e.g. caching or content distillation
- G06F16/9574—Browsing optimisation, e.g. caching or content distillation of access to content, e.g. by caching
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
Definitions
- the present invention relates to the field of Internet technologies, and in particular, to a data cache method and apparatus.
- the data cached to the cache server is only temporarily cached and not cached.
- the cached data of a certain page expires, if a large number of users access the page, the system needs to separately search for data from the database for each request, and therefore, there are a large number of requests for simultaneous access to the database.
- the query data from the database is inefficient, and the number of connections in the database is also limited, so that some users' interfaces may have short-term system exceptions and cannot view the contents of the page.
- the present invention provides a data cache method and apparatus, which can solve the following problem: when a cached data of a certain page expires, if a large number of users access the page, it is necessary to separately search for each request from the database. Data, which causes a large number of requests to access the database at the same time, which causes some users to have short-term system anomalies and unable to view the contents of the page.
- a method of data caching comprising:
- an apparatus for data caching comprising:
- a determining unit configured to determine, after receiving the data request sent by the client, a remaining valid cache duration of the cached data corresponding to the data request;
- a determining unit configured to determine whether the remaining valid cache duration obtained by the determining unit is greater than a preset update threshold
- an updating unit configured to update the cached data by using a database when a result of the determining by the determining unit is that the remaining valid cache duration is less than or equal to the update threshold.
- the method and device for data caching provided by the present invention can determine whether the remaining valid cache duration of the cached data corresponding to the data request is greater than a preset update threshold after receiving the data request sent by the client; When the remaining valid cache duration is greater than the update threshold, the cache data is directly returned to the client; when the remaining valid cache duration is a positive number and less than or equal to the update threshold, not only the cached data is returned to the client, but also through the database. Update the cached data.
- the cache data when the cache data is expired, the cache data is updated before the cache data expires, so that the cache data is updated before the cache data expires, so that when a large number of clients subsequently request the cache data, the cache The data is still in a valid state, and the cached data can be directly returned to each client, thereby reducing the phenomenon that a large number of requests concurrently access the database due to cached data expiration.
- FIG. 1 is a flowchart of a method for data caching provided by an embodiment of the present invention
- FIG. 2 is a block diagram showing the structure of an apparatus for data caching provided by an embodiment of the present invention
- FIG. 3 is a block diagram showing the composition of another data cache device according to an embodiment of the present invention.
- the embodiment of the invention provides a method for data caching.
- the method is mainly applied to the server side. As shown in FIG. 1 , the method mainly includes:
- the server may search the cache for the cached data corresponding to the data request, and determine the remaining valid cache duration of the cached data, so as to determine whether the cached data needs to be updated according to the remaining valid cache duration. .
- the cache start time and the total effective cache duration may be recorded.
- the cache time reaches the total effective cache duration the cached data expires; or a countdown timer of the total effective cache duration may be set.
- the timing is 0, the cached data expires. It can be seen that the server can determine the remaining effective cache duration of the cached data according to the time attribute of the cached data.
- the remaining valid cache duration is a positive number, and the update threshold is less than the total effective cache duration of the cached data. If the remaining valid cache duration is a positive number, the cached data is valid data. In this case, step 102 may be performed to determine whether the cached data needs to be updated in advance; if the remaining valid cache duration is 0, the cache is indicated. The data has expired, in which case step 102 is cancelled, the data is queried directly to the database for each data request, and the found data is returned to the client, and the expired cached data is updated based on the found data.
- the cached data is updated through the database.
- the cached data is returned to the client, and the cached data is updated through the database; if the remaining valid cache duration is greater than the update threshold, the cached data is directly returned to the client. You can do this without having to update the cached data through the database.
- the cache data is returned to the client and the cache data is updated by the database, or may be performed at different times, and is not limited herein.
- the server needs to update the cached data through the database.
- the update threshold is the average time required to query the data from the database to write the queried data into the cache
- the cached data completes the update operation just after the expiration; if the update threshold is less than the average time , the update operation has not been completed at the moment when the cached data expires, so that when a large number of clients send data requests from the cache data expiration to the completion of the update operation,
- To send a query request to the database for each data request which may cause a system abnormality; if the update threshold is greater than the average time, the update operation is completed before the cached data expires, so that the cache expires, and the The phenomenon that each data request sends a query request to the database. It can be seen that, in practical applications, when the update threshold is greater than or equal to the average time required to query the data from the database to write the que
- the method for data caching can determine whether the remaining valid cache duration of the cached data corresponding to the data request is greater than a preset update threshold after receiving the data request sent by the client; when the remaining valid cache duration is greater than When the threshold is updated, the cache data is directly returned to the client; when the remaining valid cache duration is a positive number and is less than or equal to the update threshold, not only the cached data is returned to the client, but also the cached data is updated through the database.
- the cache data when the cache data is expired, the cache data is updated before the cache data expires, so that the cache data is updated before the cache data expires, so that when a large number of clients subsequently request the cache data, the cache The data is still in a valid state, and the cached data can be directly returned to each client, thereby reducing the phenomenon that a large number of requests concurrently access the database due to cached data expiration.
- the data request sent by the client may be received, and during this time, the cached data corresponding to the data request may not have expired, and the update condition is satisfied (ie, the remaining of the cached data)
- the effective cache duration is less than or equal to the update threshold). Therefore, during the period in which the cached data has not expired and the cached data is updated through the database, the cached data always satisfies the update condition. Therefore, during this period, each time a data request corresponding to the cached data is received, a data query request needs to be sent to the database. In order to update the cached data, the phenomenon of frequently updating cached data and frequent access to the database occurs.
- the embodiment of the present invention improves the foregoing embodiment.
- the execution of the remaining valid cache is determined to be greater than a preset update threshold. That is, the cached data is updated only when the received data request satisfies the update condition for the first time.
- the cached data is directly returned to the corresponding client, and the cached data does not need to be updated by accessing the database.
- the embodiment of the present invention may be improved as follows on the basis of any of the above embodiments:
- the query receives the data corresponding to the cached data sent by the client. If the data request corresponding to the cached data sent by the client is not received, the cached data is updated through the database; if the data request corresponding to the cached data sent by the client is received, the data corresponding to the data request is searched from the database. After that, the found data is returned to the client, and the cached data is updated based on the found data.
- the embodiment of the present invention determines whether the stored cached data is expired in real time, and only if the cached data is expired, if the cached data is expired, if the cached data is expired, the client sends the cached data.
- the data request corresponding to the cached data directly updates the cached data through the database, so that after the cached data is updated, if the data request sent by the client is received, the updated cached data can be directly returned to the client without Each data request accesses the database, further reducing the number of requests to access the database at the same time.
- embodiment of the present invention may further improve on the basis of any of the foregoing embodiments:
- the data contained in the data resource is divided into at least two data sets according to the resource type and the preset rule.
- Each data set is independently cached, and a key corresponding to each data set is generated, so that the cached data is subsequently searched according to the key.
- the expiration time of each data set is different, and the value of the key is the primary key value of the cached data.
- the data resources include browser pages, pages on other application software, and files to be downloaded.
- the specific implementation of the foregoing step 102 may be: determining whether the remaining effective cache duration of the data set corresponding to the data request is greater than the update threshold.
- the embodiment of the present invention may divide the first page as follows: when the data resource is the first page for displaying the fixed data, according to the page layout of the first page, the data will be found from the database.
- the data contained in the first page is divided into at least two data sets. After the first page is divided, each data set is independently cached, and a key corresponding to each data set is generated, so that the cached data is subsequently searched according to the key, wherein each data set has different expiration time points.
- the first page is a page for displaying fixed data, that is, when the client accesses the first page, the service The device needs to return all the data contained in the first page to the client, so that the first page is completely displayed on the client.
- the fixed data displayed on the first page includes text, links, images, and the like.
- the data included in the first page may be divided into at least two data sets according to the page layout, and each data set corresponds to one area in the page layout, or each data set corresponds to a part of one area;
- the division rule divides the first page and is not limited herein.
- the data resource is the first page for displaying the fixed data
- the data is cached based on the first case
- the cache duration is greater than the update threshold, and the data set that satisfies the remaining valid cache duration is less than or equal to the update threshold is updated by the database.
- the embodiment of the present invention only needs to update the data set that satisfies the remaining valid cache duration less than or equal to the update threshold, compared with the prior art that the page is completely cached (ie, all the data included in the page corresponds to one key). There is no need to update other data sets corresponding to the page, thereby reducing the amount of data for updating the page data, thereby improving the update efficiency.
- the second case in the prior art, when the data contained in the second page with the conditional query function is cached, all the data is completely cached, that is, all the data contained in the second page corresponds to one key, therefore,
- the data that satisfies the condition is searched from all the cached data corresponding to the second page, and the found data is returned to the client, so the response to the client request is less efficient.
- the embodiment of the present invention may divide the second page as follows:
- the data included in the second page found in the database is divided into at least two data sets; the second page includes Multiple sets of query conditions, the result data corresponding to a set of query conditions is a data set, and a set of query conditions consists of at least one query condition.
- each data set is independently cached, and a key corresponding to each data set is generated, so that the cached data is subsequently searched according to the key.
- the second page includes each query condition and result data corresponding to a certain set of query conditions.
- the query condition is often unlimited, so all the data will be displayed on the page; when the user selects a certain set of query conditions based on the second page to query, the set of query conditions will be displayed on the page. Corresponding result data.
- the query conditions on the second page are: "Term (including unlimited, within 3 months, within 3-6 months, 6-12) Within the month), "purchase amount (including unlimited, 100-1000, 1000-1 million, 10,000-50,000, 50,000 or more)", "product type (including unlimited, fund products, insurance products, Other products)”.
- the time limit, purchase amount and product type are all unlimited, all data is displayed; when the user selects based on the second page, the period is 3 months, the purchase amount is When the product type is 10,000-50,000, the second page will display the data that meets the conditions.
- the data resource is the second page with the conditional query function, and the data is cached based on the second case, when the user performs the conditional query based on the page, it is required to determine that the remaining data set corresponding to the requested query condition is valid. Whether the cache duration is greater than the update threshold, and updating the data set through the database when the remaining valid cache duration is less than or equal to the update threshold.
- the data set corresponding to each group of query conditions is separately cached, when the user performs a conditional query based on the page, the data set under the query condition can be directly searched by the key, and the found data set is returned to the client without The query condition performs a second query from all the data contained in the page, thereby improving the efficiency of responding to client requests.
- another embodiment of the present invention further provides a device for data buffering.
- the device mainly includes: a determining unit 21, a determining unit 22, and an updating unit 23. among them,
- a determining unit 21 configured to determine, after receiving the data request sent by the client, a remaining valid cache duration of the cached data corresponding to the data request;
- the determining unit 22 is configured to determine whether the remaining valid cache duration obtained by the determining unit 21 is greater than a preset update threshold
- the updating unit 23 is configured to update the cached data through the database when the judgment result of the determining unit 22 is that the remaining valid cache duration is less than or equal to the update threshold.
- the device for data caching provided by the embodiment of the present invention can determine whether the remaining valid cache duration of the cached data corresponding to the data request is greater than a preset update threshold after receiving the data request sent by the client; when the remaining valid cache duration is greater than When the threshold is updated, the cache data is directly returned to the client; when the remaining valid cache duration is a positive number and is less than or equal to the update threshold, not only the cached data is returned to the client, but also the cached data is updated through the database.
- the cache data when the cache data is expired, the cache data is updated before the cache data expires, so that the cache data is updated before the cache data expires, so that when a large number of clients subsequently request the cache data, the cache The data is still in a valid state, and the cached data can be directly returned to each client, thereby reducing the phenomenon that a large number of requests concurrently access the database due to cached data expiration.
- the device further includes:
- the canceling unit 24 is configured to: during the update of the cached data, if another data request is received, cancel the execution to determine whether the remaining valid cache duration is greater than a preset update threshold.
- the device further includes:
- the query unit 25 is configured to: when the stored cache data expires, query whether the data request corresponding to the cached data sent by the client is received;
- the updating unit 23 is further configured to: when the data request corresponding to the cache data sent by the client is not received, update the cache data through the database;
- the sending unit 26 is configured to: after receiving the data request corresponding to the cached data sent by the client, after searching the data corresponding to the data request from the database, returning the found data to the client;
- the update unit 23 is also operative to update the cached data based on the found data.
- the device further includes:
- a dividing unit 27 configured to divide data included in the data resource into at least two data sets according to the resource type and the preset rule when the data resource is first accessed;
- the buffer unit 28 is configured to cache the respective data sets obtained by the dividing unit 27, and generate keys corresponding to the respective data sets, so as to subsequently search the cached data according to the key, wherein the expiration time points of each data set are different.
- the dividing unit 27 includes:
- the first dividing module 271 is configured to: when the data resource is the first page for displaying the fixed data, divide the data included in the first page that is found from the database into at least two data according to the page layout of the first page. set;
- the second dividing module 272 is configured to, when the data resource is the second page with the conditional query function, divide the data included in the second page found in the database into at least two according to the query condition combination involved in the second page.
- the determining unit 22 is configured to determine whether the remaining valid cache duration of the data set corresponding to the data request is greater than an update threshold.
- the device embodiment corresponds to the foregoing method embodiment.
- the device embodiment does not describe the details in the foregoing method embodiments one by one, but it should be clear that the device in this embodiment can implement the foregoing method. All the contents of the example.
- the device for buffering data includes a processor and a memory, and the determining unit, the determining unit, the updating unit, and the like Each is stored as a program unit in a memory, and the above-described program unit stored in the memory is executed by the processor to implement the corresponding function.
- the processor contains a kernel, and the kernel removes the corresponding program unit from the memory.
- the kernel can be set to one or more. By adjusting the kernel parameters to reduce the cache expiration, there are a large number of requests for concurrent access to the database.
- the memory may include non-persistent memory, random access memory (RAM), and/or non-volatile memory in a computer readable medium, such as read only memory (ROM) or flash memory (flash RAM), the memory including at least one Memory chip.
- RAM random access memory
- ROM read only memory
- flash RAM flash memory
- the application also provides a computer program product, when executed on a data processing device, adapted to perform initialization of program code having the following method steps:
- the cached data is updated by the database.
- modules in the devices of the embodiments can be adaptively changed and placed in one or more devices different from the embodiment.
- the modules or units or components of the embodiments may be combined into one module or unit or component, and further they may be divided into a plurality of sub-modules or sub-units or sub-components.
- any combination of the features disclosed in the specification, including the accompanying claims, the abstract and the drawings, and any methods so disclosed, or All processes or units of the device are combined.
- Each feature disclosed in this specification (including the accompanying claims, the abstract and the drawings) may be replaced by alternative features that provide the same, equivalent or similar purpose.
- the various component embodiments of the present invention may be implemented in hardware, or in a software module running on one or more processors, or in a combination thereof.
- a device or device program e.g., a computer program and a computer program product
- Such a program implementing the invention may be stored on a computer readable medium or may be in the form of one or more signals.
- signals may be downloaded from an Internet website, provided on a carrier signal, or provided in any other form.
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Abstract
Description
Claims (12)
- 一种数据缓存的方法,其特征在于,所述方法包括:在接收到客户端发送的数据请求后,确定所述数据请求对应的缓存数据的剩余有效缓存时长;判断所述剩余有效缓存时长是否大于预设的更新阈值;若所述剩余有效缓存时长小于或等于所述更新阈值,则通过数据库更新所述缓存数据。
- 根据权利要求1所述的方法,其特征在于,所述方法还包括:在所述缓存数据的更新期间,若再接收到其他数据请求,则取消执行所述判断所述剩余有效缓存时长是否大于预设的更新阈值。
- 根据权利要求2所述的方法,其特征在于,所述方法还包括:当存储的缓存数据过期时,查询是否接收到客户端发送的所述缓存数据对应的数据请求;若没有接收到客户端发送的所述缓存数据对应的数据请求,则通过所述数据库更新所述缓存数据;若接收到客户端发送的所述缓存数据对应的数据请求,则在从所述数据库中查找到所述数据请求对应的数据后,将查找到的数据返回给客户端,并基于所述查找到的数据更新所述缓存数据。
- 根据权利要求1至3任一项所述的方法,其特征在于,所述方法还包括:当数据资源首次被访问时,根据资源类型和预置规则将所述数据资源包含的数据划分为至少两个数据集合;将各个数据集合独立进行缓存,并生成各个数据集合对应的key,以便后续根据所述key查找缓存数据,其中,每个数据集合的过期时间点不同。
- 根据权利要求4所述的方法,其特征在于,根据资源类型和预置规则将所述数据资源包含的数据划分为至少两个数据集合,包括:当所述数据资源为用于展示固定数据的第一页面时,根据所述第一页面的页面布局,将从所述数据库中查找到的所述第一页面包含的数据划分为至少两个数据集合;当所述数据资源为具有条件查询功能的第二页面时,根据所述第二页面涉及的查询条件组合,将从所述数据库中查找到的所述第二页面包含的数据划分为至少两个数据集 合;所述第二页面中包括多组查询条件,一组查询条件对应的结果数据为一个数据集合,一组查询条件由至少一个查询条件组成。
- 根据权利要求4所述的方法,其特征在于,判断所述剩余有效缓存时长是否大于预设的更新阈值,包括:判断所述数据请求对应的数据集合的剩余有效缓存时长是否大于所述更新阈值。
- 一种数据缓存的装置,其特征在于,所述装置包括:确定单元,用于在接收到客户端发送的数据请求后,确定所述数据请求对应的缓存数据的剩余有效缓存时长;判断单元,用于判断所述确定单元获得的所述剩余有效缓存时长是否大于预设的更新阈值;更新单元,用于当所述判断单元的判断结果为所述剩余有效缓存时长小于或等于所述更新阈值时,通过数据库更新所述缓存数据。
- 根据权利要求7所述的装置,其特征在于,所述装置还包括:取消单元,用于在所述缓存数据的更新期间,若再接收到其他数据请求,则取消执行所述判断所述剩余有效缓存时长是否大于预设的更新阈值。
- 根据权利要求8所述的装置,其特征在于,所述装置还包括:查询单元,用于当存储的缓存数据过期时,查询是否接收到客户端发送的所述缓存数据对应的数据请求;所述更新单元还用于当没有接收到客户端发送的所述缓存数据对应的数据请求时,通过所述数据库更新所述缓存数据;发送单元,用于当接收到客户端发送的所述缓存数据对应的数据请求时,在从所述数据库中查找到所述数据请求对应的数据后,将查找到的数据返回给客户端;所述更新单元还用于基于所述查找到的数据更新所述缓存数据。
- 根据权利要求7至9任一项所述的装置,其特征在于,所述装置还包括:划分单元,用于当数据资源首次被访问时,根据资源类型和预置规则将所述数据资源包含的数据划分为至少两个数据集合;缓存单元,用于将所述划分单元获得的各个数据集合独立进行缓存,并生成各个数据集合对应的key,以便后续根据所述key查找缓存数据,其中,每个数据集合的过期时间点不同。
- 根据权利要求10所述的装置,其特征在于,所述划分单元,包括:第一划分模块,用于当所述数据资源为用于展示固定数据的第一页面时,根据所述第一页面的页面布局,将从所述数据库中查找到的所述第一页面包含的数据划分为至少两个数据集合;第二划分模块,用于当所述数据资源为具有条件查询功能的第二页面时,根据所述第二页面涉及的查询条件组合,将从所述数据库中查找到的所述第二页面包含的数据划分为至少两个数据集合;所述第二页面中包括多组查询条件,一组查询条件对应的结果数据为一个数据集合,一组查询条件由至少一个查询条件组成。
- 根据权利要求11所述的装置,其特征在于,所述判断单元用于判断所述数据请求对应的数据集合的剩余有效缓存时长是否大于所述更新阈值。
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JP2018551171A JP6748734B2 (ja) | 2016-04-01 | 2017-03-20 | データキャッシング方法及び装置 |
EP17773069.4A EP3418911A4 (en) | 2016-04-01 | 2017-03-20 | METHOD AND APPARATUS FOR CACHING DATA |
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PH12018502065A PH12018502065A1 (en) | 2016-04-01 | 2018-09-26 | Data caching method and apparatus |
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CN201610204539.8A CN107291756A (zh) | 2016-04-01 | 2016-04-01 | 数据缓存的方法及装置 |
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CN (1) | CN107291756A (zh) |
MY (1) | MY190884A (zh) |
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CN113645309B (zh) * | 2021-08-18 | 2024-08-06 | 浙江苍南仪表集团股份有限公司 | 多客户端数据差异化二次缓存及同步的处理方法及系统 |
KR20240003313A (ko) * | 2022-06-30 | 2024-01-08 | 쿠팡 주식회사 | 데이터 제공 방법 및 그 장치 |
CN115438279B (zh) * | 2022-08-10 | 2023-06-27 | 珠海金智维信息科技有限公司 | 数据可视化方法、装置、电子设备及介质 |
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US20190034550A1 (en) | 2019-01-31 |
TWI665569B (zh) | 2019-07-11 |
US11449570B2 (en) | 2022-09-20 |
JP6748734B2 (ja) | 2020-09-02 |
EP3418911A1 (en) | 2018-12-26 |
CN107291756A (zh) | 2017-10-24 |
KR20180125009A (ko) | 2018-11-21 |
EP3418911A4 (en) | 2019-11-06 |
SG11201808173RA (en) | 2018-10-30 |
PH12018502065A1 (en) | 2019-06-24 |
MY190884A (en) | 2022-05-17 |
KR102232813B1 (ko) | 2021-03-29 |
JP2019512819A (ja) | 2019-05-16 |
TW201738783A (zh) | 2017-11-01 |
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