• <tr id="yyy80"></tr>
  • <sup id="yyy80"></sup>
  • <tfoot id="yyy80"><noscript id="yyy80"></noscript></tfoot>
  • 99热精品在线国产_美女午夜性视频免费_国产精品国产高清国产av_av欧美777_自拍偷自拍亚洲精品老妇_亚洲熟女精品中文字幕_www日本黄色视频网_国产精品野战在线观看 ?

    ADistributed In-Memory Database Solution for Mass Data Applications

    2010-06-05 08:15:16DongHaoLuoShengmeiZhangHengsheng
    ZTE Communications 2010年4期

    Dong Hao,Luo Shengmei,Zhang Hengsheng

    (Communication Service R&D Institute,ZTE Corporation,Nanjing 210012,P.R.China)

    Abstract:In this paper,a Distributed In-Memory Database(DIMDB)system is proposed to improve processing efficiency in mass data applications.The system uses an enhanced language similar to Structured Query Language(SQL)with a key-value storage schema.The design goals of the DIMDB system is described and its system architecture is discussed.Operation flow and the enhanced SQL-like language are also discussed,and experimental results are used to test the validity of the system.

    Key Words:distributed in-memory system;enhanced key-value schema;mass data application

    A nalyzing and processing mass data is a common function of telecommunications and Internet service applications.As the number of service users increases,traditional on-disk database systems struggle to satisfy demand for mass data processing.Typical service applications include fast querying of large-scale user databases for social networking services,data processing of mass logs,and data analysis and mining of mass databases.In these tasks,response time plays a critical role.

    An in-memory database that relies on main memory for computer data storage has been widely used in recent years.In contrast to database management systems,which employ a disk-optimized storage mechanism,main memory databases are faster.Internaloptimization algorithms of main memory databases are simpler and execute fewer CPU instructions.Accessing data in the main memory is faster and more predictable than accessing data on disk[1].Storage services require high availability,good performance,and strong consistency[2].In-Memory Databases(IMDBs)[3]satisfy these requirements and have emerged as a way of improving the performance of short transactions[4].Since IMDBs can be accessed directly from the memory,response time is quicker,and transaction throughput is improved when compared to a Disk-Resident Database(DRDB).This is especially important for real-time applications where transactions need to be completed within a specified timeframe[5].

    The number service application users is many times higher than in the past.But memory capacity and CPU processing limitations on a single computer means the IMDB system often cannot deal with the mass data in these applications.For example,the main memory in a computer is normally 4 GB to 8 GB,while 100 GB may be needed for a database of 100 million users where every user record needs 1 Kb.In many cases,the IMDB system on a single computer cannot store all the data of certain types of applications.For some applications,logic processing is complicated and processing time is lengthy.So assigning all these processing tasks to one computer is not ideal.

    To improve data processing efficiency,a Distributed In-Memory Database(DIMDB)system is proposed.The DIMDBsystem in this paper supports expanded Structured Query Language(SQL)grammar with a key-value storage schema.

    1 Design Goals of DIMDB System

    The design of DIMDB has three goals:

    (1)High Performance

    A DIMDB system should be capable of high-performance data access and processing.Many current telecom and Internet service applications produce mass data every day,and this data should be easily accessible and efficiently processed.Mass data might include detailed call records of telecommunications systems,user subscription information,web access logs of Internet Service Providers(ISPs),and monitoring data derived from sensor networks.These kinds of mass data could be stored in a DIMDB system for ease of access and high-performance processing.

    (2)High Scalability DIMDB is a distributed system with multiple data nodes to accommodate mass data applications.As the amount of data and processing increases,new data nodes can be added online without interrupting the running service.If the DIMDBsystem has more data nodes than necessary,redundant nodes can be removed.

    (3)High Reliability

    ▲Figure 1.The basic architecture of a DIMDBsystem.

    ▲Figure 2.The DIMDB-master functionalstructure.

    Data stored in one node always has one or more duplicate copies in other nodes.If a data node fails,an application can use duplicate data on other nodes.The DIMDB management node is an active-standby system for Home Agent(HA).

    2 Architecture of a DIMDB System

    Figure 1 shows the basic architecture of a DIMDBsystem consisting of three elements:DIMDB-Master,DIMDB-Client,and DIMDB-Data Node(DIMDB-DN).The DIMDB-Client generally receives data processing instructions and access requests from upper-level applications.After analyzing these instructions,it sends the requests to DIMDB-Master for data distribution information,and returns the information according to the data distribution policy.The DIMDB-Client then sends commands to the specific DIMDB-DN for processing and data access.

    2.1 DIMDB-Master

    The DIMDB-Master:

    ·Allows applications to configure data distribution policies;

    ·Allows DIMDB-Client to query configured policies;

    ·Activates or deactivates DIMDB-DNs and queries the status of DIMDB-DNs.

    The functionalstructure of DIMDB-Master is shown in Figure 2.

    There are five modules in DIMDB-Master:main control module,http communication module,configure module,node management module,and policy storage.

    The main control module is the key functional module of DIMDB-Master.It interacts with other modules to complete essentialfunctions of DIMDB-Master.

    The policy storage is used to save data distribution policies.

    The http communication module provides M1interface for interaction with DIMDB-Client.M1interface is used to receive query requests from DIMDB-Client and to send data distribution information to DIMDB-Client.

    The configuration module interacts with the external operation and maintenance platform to configure data distribution policies on each DIMDB-DN through the M2interface.

    The node management module connects to each DIMDB-DN using M3interface.It monitors the status of DIMDB-DNs,and activates or deactivates DIMDB-DNs.Status information includes CPUefficiency,the efficiency and capacity of memory used,and whether the DIMDB-DN is operational or non-operational.

    2.2 DIMDB-Client

    The functionalmodules of DIMDB-Client are shown in Figure 3.

    The APImodule in DIMDB-Client is used by upper-level applications to call the data operation functions of DIMDB-Client.

    The statement parser is used to transform received SQL-like statements into two parts:database operation statement and input condition(used for requesting data distribution information).

    The execution engine is a dynamic link library connected to DIMDB-ND.It is provided by the database management system on a data node,and is used to bring the statement into operation.

    The policy acquisition module is used to obtain the data distribution policy from DIMDB-Master according to the input condition.

    2.3 DIMDB-DN

    DIMDB-DN is a conventional in-memory database used for data storage.It is a stable and efficient database management system supporting Open Database Connectivity(ODBC)and Java Database Connectivity(JDBC)interfaces.

    3 Enhanced SQL-Like Language and Operation Flows

    3.1 Enhanced SQL-Like Language

    ▲Figure 3.DIMDB-client functional structure.

    Data operation and query in the proposed system is carried out using an enhanced SQL-like language.This language mimics SQLsyntax for creating tables,loading data into tables,and querying tables.Enhanced SQL-like language also allows data distribution information to be embedded into statements.When the DIMDB-Client receives an SQL-like statement,the statement parser transforms it into a normal SQL statement and input condition.The input condition is a kind of key-value range pair.The policy acquisition module then sends the condition to DIMDB-Master,and receives data distribution DIMDB-DNinformation through C2interface.This information includes node IPaddresses and ports oriented to each key-value sub-range pair.According to the information received,DIMDB-Client rewrites the SQLstatement and divides it into sub-statements.DIMDB-Client connects to DIMDB-DNs,executes the statements through the execution engine,and collects the data operation results.

    Enhanced SQL-like language used in the proposed system includes the condition for data distribution information.For example,the following statement creates a TABLEt1 with additional conditions:

    CREATETABLEt1(Index int not null,Name char(50)not null,Age int,Height

    The following statement inserts a record into TABLEt1:

    INSERTINTO t1(Index,Name,Age,

    When receiving statements(1)and(2),DIMDB-Client abstracts and sends the key-value pair to DIMDB-Master,which returns the data node information according to the key-value pair.Then DIMDB-Client performs the data operations on DIMDB-DNs according to the received data node information.

    If the application needs to query data in TABLEt1,a statement is sent to DIMDB-Client as follows:

    SELECT·FROM t1 WHEREAge=25

    After receiving query statement(3),DIMDB-Client abstracts the key-value pair Key=Index,Minvalue=1001,Maxvalue=1100 and sends it to DIMDB-Master.DIMDB-Master then returns the data node information DIMDB-ND_1 and DIMDB-ND_2,and corresponding key-value sub-range pairs Key=Index,Minvalue=1001,Maxvalue=1050;and Key=Index,Minvalue=1051,Maxvalue=1100.Then DIMDB-Client divides and rewrites the query statement according to the received data node information.The first sent to DIMDB-ND_1 is:

    SELECT·FROM t1 WHEREAge=25 and(Index>=1001

    And the second sent to DIMDB_ND_2 is:

    SELECT·FROM t1 WHERE Age=25 and(Index>=1050

    After obtaining query results from the two DIMDB-DNs,DIMDB-Client combines the results and returns them to the application.

    3.2 Operation Flows

    The operation flow of the DIMDB system is shown in Figure 4.

    Step 1:The application calls the API interface in DIMDB-Client with the parameter of an enhanced SQL-like statement.

    Step 2:The statement is sent to the statement parser module.

    Step 3:After being analyzed,the normal SQLstatement is saved,and the key-value range pair is sent to the policy acquisition module.

    Steps 4 and 5:The policy acquisition module interacts with DIMDB-Master to obtain the data distribution information.The input is the key-value range pair,and the output is the IPaddresses and ports of DIMDB-DN for each divided key-value sub-range pair.

    Step 6:The data distribution information is sent to API.Step 7:The APIcomposes multiple SQL statements and calls the function of the execution engine with the parameters of new statements and data node information.

    ▲Figure 4.The DIMDBsystem operation flow.

    Step 8.1-8.n:The execution engine connects to multiple DIMDB-DNs and executes the SQL statements.

    Step 9.1-9.n:The execution engine obtains the data results.

    Step 10:The execution engine sends the data results to API.

    Step 11:APIcombines the all data results and returns them to the application.

    With these 11 steps,the operation is finished.

    4 Experiments

    In this section,some experiments are provided to evaluate the performance and scalability of the DIMDB system.

    4.1 Experiment Environment

    The configuration of the experiment environment is listed in Table I.

    4.2 Experimental Results

    The bar chart in Figure 5 shows the query time for different total data scales,being 100 k,1 M and 10 M records in the databases of all DIMDB-DNs.Different colored columns denote different scales.The query efficiency for large-scale data in the DIMDB system is notably better than in traditional databases.

    As shown in Figure 6,query time for different DIMDB-DNs in the system is different.The query time for DIMDB-DN 3 is notably shorter than that for DIMDB-DNs 1 and 2.When the scale of data is increased,more DIMDB-DNs should be added to the system.

    ▼Table I.Configuration of experiment environment

    ?Figure 5.Query time for different totaldata scales.

    ?Figure 6.Comparison of query time for different DIMDB-DNs in the system.

    The above illustrates the effectiveness of the prototype in this paper.Efficiency of the DIMDBsystem is expected to improve with optimizations such as table indexing,and more reasonable data distribution policies.When expanded to hundreds of data nodes,the DIMDB system could be used in telecommunications and Internet applications requiring mass data processing.

    5 Conclusion

    In this paper,limitations of current in-memory database systems are analyzed,and an a DIMDB system is proposed to improve data processing ability in mass data applications.An enhanced language similar to SQLis used,which has the advantage of a key-value storage schema.DIMDB could be widely used in applications that require mass data processing.Future research will need to be conducted into optimizing data distribution policies and table dividing schemas,and improving overall stability of the system.

    Acknowledgment:Thank you to Tang Jue for his support and patient guidance,and to Wang Zhiping,Zhou Yang,Ye Xiaoweiand Lin Xiangdong for their contributions to this work.

    色婷婷久久久亚洲欧美| 69av精品久久久久久 | 日本一区二区免费在线视频| 国产在线一区二区三区精| 一区二区三区四区激情视频| 99久久精品国产亚洲精品| 午夜福利一区二区在线看| 丝袜美足系列| 国产一区二区在线观看av| 欧美xxⅹ黑人| 热re99久久精品国产66热6| 亚洲精品av麻豆狂野| 亚洲精品日韩在线中文字幕| 18禁国产床啪视频网站| 午夜免费鲁丝| 别揉我奶头~嗯~啊~动态视频 | svipshipincom国产片| 欧美日韩成人在线一区二区| 亚洲精品美女久久av网站| www.自偷自拍.com| 一本大道久久a久久精品| 国产精品 欧美亚洲| 亚洲精品自拍成人| 欧美xxⅹ黑人| 亚洲av欧美aⅴ国产| 精品久久久久久久毛片微露脸 | 久久亚洲精品不卡| 飞空精品影院首页| 婷婷色av中文字幕| 亚洲专区国产一区二区| 中国国产av一级| 嫩草影视91久久| 国产精品亚洲av一区麻豆| av网站免费在线观看视频| 国产免费av片在线观看野外av| av一本久久久久| cao死你这个sao货| 美女高潮喷水抽搐中文字幕| 伊人久久大香线蕉亚洲五| 在线十欧美十亚洲十日本专区| 欧美久久黑人一区二区| 夜夜夜夜夜久久久久| 亚洲精品自拍成人| 亚洲九九香蕉| 黄片小视频在线播放| 亚洲少妇的诱惑av| 亚洲欧美日韩另类电影网站| 看免费av毛片| 久久久国产一区二区| 麻豆国产av国片精品| 天堂中文最新版在线下载| 欧美黑人欧美精品刺激| 亚洲成人免费av在线播放| 建设人人有责人人尽责人人享有的| 色播在线永久视频| av一本久久久久| 亚洲伊人久久精品综合| 国产黄色免费在线视频| 久久女婷五月综合色啪小说| 午夜免费观看性视频| 久久久久久久国产电影| a 毛片基地| 天天躁日日躁夜夜躁夜夜| 免费一级毛片在线播放高清视频 | 欧美激情高清一区二区三区| videosex国产| 久久久欧美国产精品| 亚洲国产精品成人久久小说| 性少妇av在线| 视频区欧美日本亚洲| 一区二区三区激情视频| 老司机福利观看| 美女脱内裤让男人舔精品视频| 亚洲精品在线美女| 正在播放国产对白刺激| 69av精品久久久久久 | 9热在线视频观看99| 在线av久久热| 五月开心婷婷网| 一区二区三区激情视频| www.精华液| 性色av乱码一区二区三区2| 女人被躁到高潮嗷嗷叫费观| 亚洲欧洲精品一区二区精品久久久| 中文字幕另类日韩欧美亚洲嫩草| 999久久久国产精品视频| 黑人欧美特级aaaaaa片| 中亚洲国语对白在线视频| 欧美av亚洲av综合av国产av| 亚洲成人免费电影在线观看| 丝袜喷水一区| 国产真人三级小视频在线观看| 少妇精品久久久久久久| 80岁老熟妇乱子伦牲交| 国产精品久久久人人做人人爽| 久久久国产欧美日韩av| 99久久人妻综合| 91成人精品电影| 自线自在国产av| 丰满饥渴人妻一区二区三| 一二三四在线观看免费中文在| 久久久久久久国产电影| 中文字幕制服av| 啦啦啦啦在线视频资源| 午夜两性在线视频| 国产精品1区2区在线观看. | 国产精品久久久人人做人人爽| 国产在线观看jvid| 精品视频人人做人人爽| 久久狼人影院| 久久精品国产亚洲av香蕉五月 | 正在播放国产对白刺激| 国产成人av激情在线播放| 淫妇啪啪啪对白视频 | 黑人巨大精品欧美一区二区mp4| 国产精品熟女久久久久浪| 精品福利观看| 久久狼人影院| 激情视频va一区二区三区| 丝袜在线中文字幕| 国产精品国产三级国产专区5o| 老司机靠b影院| 一边摸一边做爽爽视频免费| 一本大道久久a久久精品| 亚洲av片天天在线观看| 一级毛片精品| 免费在线观看日本一区| www.熟女人妻精品国产| 亚洲精品国产色婷婷电影| 2018国产大陆天天弄谢| 国产亚洲欧美精品永久| 亚洲免费av在线视频| 丰满人妻熟妇乱又伦精品不卡| 精品一区在线观看国产| 国产男人的电影天堂91| 国产区一区二久久| 日韩一卡2卡3卡4卡2021年| 国产成人一区二区三区免费视频网站| 十八禁人妻一区二区| 99久久国产精品久久久| 狂野欧美激情性xxxx| 高清av免费在线| 91老司机精品| 一级毛片精品| 一二三四在线观看免费中文在| 又紧又爽又黄一区二区| 久久人人97超碰香蕉20202| 纯流量卡能插随身wifi吗| 在线观看免费视频网站a站| 99久久人妻综合| 亚洲少妇的诱惑av| 91成人精品电影| 亚洲国产毛片av蜜桃av| 国产日韩欧美在线精品| 国产在线一区二区三区精| 男人添女人高潮全过程视频| 91成人精品电影| 亚洲国产毛片av蜜桃av| h视频一区二区三区| 男人添女人高潮全过程视频| 午夜免费观看性视频| 国产又色又爽无遮挡免| 午夜福利一区二区在线看| 久久天堂一区二区三区四区| 他把我摸到了高潮在线观看 | 久久久久久久大尺度免费视频| 午夜视频精品福利| 午夜精品国产一区二区电影| 中文字幕制服av| 老熟女久久久| 一个人免费看片子| 日韩 欧美 亚洲 中文字幕| h视频一区二区三区| 久久天堂一区二区三区四区| 精品乱码久久久久久99久播| 91精品三级在线观看| 19禁男女啪啪无遮挡网站| 亚洲中文av在线| 色94色欧美一区二区| 国内毛片毛片毛片毛片毛片| 国产伦人伦偷精品视频| 欧美精品一区二区大全| 日韩大码丰满熟妇| 亚洲天堂av无毛| 国产成人一区二区三区免费视频网站| 桃花免费在线播放| 精品久久蜜臀av无| 国产精品一区二区在线不卡| 久久综合国产亚洲精品| 国产成人a∨麻豆精品| 91九色精品人成在线观看| av不卡在线播放| av免费在线观看网站| 一区二区三区激情视频| 999久久久国产精品视频| 一个人免费看片子| 亚洲精品久久成人aⅴ小说| 1024香蕉在线观看| 啦啦啦 在线观看视频| 黄色视频,在线免费观看| 永久免费av网站大全| av片东京热男人的天堂| 亚洲欧美日韩高清在线视频 | 美女视频免费永久观看网站| 国产一卡二卡三卡精品| 国产欧美日韩精品亚洲av| 亚洲精品中文字幕一二三四区 | 又大又爽又粗| 亚洲第一欧美日韩一区二区三区 | 欧美日韩亚洲综合一区二区三区_| 69av精品久久久久久 | 国产黄色免费在线视频| 69精品国产乱码久久久| 成人国产av品久久久| 久久九九热精品免费| 国产成人精品久久二区二区免费| 丁香六月欧美| 一本久久精品| 日韩 亚洲 欧美在线| 婷婷成人精品国产| 99国产极品粉嫩在线观看| 精品国产一区二区三区四区第35| 午夜福利一区二区在线看| 亚洲精品美女久久av网站| 最近中文字幕2019免费版| 欧美精品人与动牲交sv欧美| 免费高清在线观看视频在线观看| 在线观看免费午夜福利视频| 成年女人毛片免费观看观看9 | 亚洲精品一卡2卡三卡4卡5卡 | 宅男免费午夜| 日韩熟女老妇一区二区性免费视频| 亚洲七黄色美女视频| 久久九九热精品免费| 性少妇av在线| 欧美另类一区| 日日夜夜操网爽| 国产精品久久久久成人av| 国产日韩欧美视频二区| 久久久久久久国产电影| 国产成人系列免费观看| 宅男免费午夜| 免费高清在线观看日韩| 永久免费av网站大全| 成人黄色视频免费在线看| 免费不卡黄色视频| 欧美国产精品一级二级三级| 男男h啪啪无遮挡| 美女国产高潮福利片在线看| 日本五十路高清| 久久久水蜜桃国产精品网| 亚洲美女黄色视频免费看| 成人黄色视频免费在线看| 亚洲激情五月婷婷啪啪| 亚洲七黄色美女视频| 精品国产乱码久久久久久男人| 亚洲中文av在线| 成年人免费黄色播放视频| 美女高潮喷水抽搐中文字幕| 热99久久久久精品小说推荐| 美女午夜性视频免费| 亚洲成人免费av在线播放| 99久久人妻综合| 久久人人97超碰香蕉20202| 亚洲精品国产区一区二| 秋霞在线观看毛片| 久热爱精品视频在线9| 国产精品1区2区在线观看. | 久久久久国产精品人妻一区二区| www日本在线高清视频| 老司机亚洲免费影院| 又黄又粗又硬又大视频| 王馨瑶露胸无遮挡在线观看| 亚洲精品av麻豆狂野| 窝窝影院91人妻| 免费一级毛片在线播放高清视频 | 三上悠亚av全集在线观看| 搡老岳熟女国产| 欧美xxⅹ黑人| 亚洲一卡2卡3卡4卡5卡精品中文| 亚洲国产中文字幕在线视频| 欧美日韩国产mv在线观看视频| 每晚都被弄得嗷嗷叫到高潮| 久久毛片免费看一区二区三区| 亚洲欧美精品自产自拍| 亚洲国产av影院在线观看| 一区二区三区四区激情视频| 久久人人爽人人片av| 亚洲第一av免费看| 国产亚洲精品久久久久5区| 欧美精品一区二区免费开放| 777米奇影视久久| 亚洲av成人一区二区三| 美女视频免费永久观看网站| 人妻 亚洲 视频| 久久久国产精品麻豆| 18禁黄网站禁片午夜丰满| 精品少妇久久久久久888优播| 三上悠亚av全集在线观看| 午夜福利免费观看在线| 国产一区二区在线观看av| 91精品国产国语对白视频| 建设人人有责人人尽责人人享有的| 亚洲男人天堂网一区| 日本一区二区免费在线视频| 国产日韩一区二区三区精品不卡| 一级a爱视频在线免费观看| av在线app专区| 成年美女黄网站色视频大全免费| 一区二区av电影网| 久久 成人 亚洲| 精品国产一区二区三区四区第35| 1024视频免费在线观看| 精品一区二区三区av网在线观看 | 亚洲欧洲精品一区二区精品久久久| 国产老妇伦熟女老妇高清| 91麻豆精品激情在线观看国产 | 精品国产乱码久久久久久男人| 亚洲一区二区三区欧美精品| 国产国语露脸激情在线看| 亚洲国产欧美在线一区| 色视频在线一区二区三区| 免费在线观看视频国产中文字幕亚洲 | 我的亚洲天堂| 老司机靠b影院| 亚洲视频免费观看视频| 久久免费观看电影| 国产男女内射视频| 亚洲专区字幕在线| 国产成人欧美| 日本欧美视频一区| 十八禁网站免费在线| 久久99一区二区三区| 99精品久久久久人妻精品| 久久久久国产一级毛片高清牌| 50天的宝宝边吃奶边哭怎么回事| 亚洲自偷自拍图片 自拍| 999精品在线视频| 国产亚洲欧美在线一区二区| 一本色道久久久久久精品综合| 一本久久精品| 国产不卡av网站在线观看| 母亲3免费完整高清在线观看| 久久久国产一区二区| 老熟妇乱子伦视频在线观看 | 久久精品国产亚洲av高清一级| av片东京热男人的天堂| 丝袜美足系列| 国产精品影院久久| 日本a在线网址| 自拍欧美九色日韩亚洲蝌蚪91| 国产精品久久久久成人av| 欧美精品高潮呻吟av久久| 狠狠狠狠99中文字幕| 中文精品一卡2卡3卡4更新| 欧美精品啪啪一区二区三区 | 日韩熟女老妇一区二区性免费视频| 在线观看免费午夜福利视频| 啦啦啦在线免费观看视频4| 久久久久久人人人人人| 性高湖久久久久久久久免费观看| 桃红色精品国产亚洲av| www.熟女人妻精品国产| 国产亚洲一区二区精品| 美女高潮喷水抽搐中文字幕| e午夜精品久久久久久久| 热99国产精品久久久久久7| 久热这里只有精品99| 午夜福利在线观看吧| 91老司机精品| 悠悠久久av| 久久精品人人爽人人爽视色| 一本—道久久a久久精品蜜桃钙片| 女性被躁到高潮视频| 另类亚洲欧美激情| 高清黄色对白视频在线免费看| 亚洲精品乱久久久久久| 岛国在线观看网站| 欧美午夜高清在线| av网站免费在线观看视频| 18禁裸乳无遮挡动漫免费视频| 国产免费视频播放在线视频| 性色av一级| 国产又色又爽无遮挡免| 人成视频在线观看免费观看| 两人在一起打扑克的视频| 国产免费视频播放在线视频| 另类精品久久| 日韩欧美一区二区三区在线观看 | 一区二区三区精品91| 淫妇啪啪啪对白视频 | 国产欧美日韩精品亚洲av| 两性夫妻黄色片| 在线观看免费高清a一片| 涩涩av久久男人的天堂| 男女之事视频高清在线观看| 亚洲国产av影院在线观看| 久久99热这里只频精品6学生| 亚洲熟女毛片儿| 久久毛片免费看一区二区三区| 交换朋友夫妻互换小说| 亚洲第一欧美日韩一区二区三区 | 亚洲精华国产精华精| 亚洲精品国产一区二区精华液| 国产精品国产三级国产专区5o| 蜜桃在线观看..| 午夜精品久久久久久毛片777| 99久久99久久久精品蜜桃| 久久国产精品男人的天堂亚洲| 久久久久久久久久久久大奶| 91老司机精品| 极品少妇高潮喷水抽搐| 最近最新中文字幕大全免费视频| 中文字幕最新亚洲高清| 丝袜在线中文字幕| 男女边摸边吃奶| 精品国产国语对白av| 少妇被粗大的猛进出69影院| 两人在一起打扑克的视频| 色老头精品视频在线观看| 欧美激情极品国产一区二区三区| 午夜激情久久久久久久| 在线观看www视频免费| 亚洲av日韩精品久久久久久密| 国产国语露脸激情在线看| 免费日韩欧美在线观看| 日本精品一区二区三区蜜桃| 视频区图区小说| 欧美人与性动交α欧美软件| 一区二区日韩欧美中文字幕| 亚洲熟女精品中文字幕| 人妻人人澡人人爽人人| 日韩欧美一区视频在线观看| 丁香六月天网| 黄色怎么调成土黄色| av天堂在线播放| 男女免费视频国产| 91精品国产国语对白视频| 久久天堂一区二区三区四区| 狂野欧美激情性xxxx| 国产日韩欧美视频二区| 亚洲av电影在线进入| svipshipincom国产片| 波多野结衣av一区二区av| 亚洲五月婷婷丁香| 美女国产高潮福利片在线看| 99国产精品免费福利视频| 18禁裸乳无遮挡动漫免费视频| 国产精品1区2区在线观看. | 超色免费av| 一级毛片精品| 一区福利在线观看| 黄色片一级片一级黄色片| 日韩一区二区三区影片| 天天操日日干夜夜撸| 中文字幕高清在线视频| 精品人妻熟女毛片av久久网站| 国产激情久久老熟女| 99国产极品粉嫩在线观看| 中亚洲国语对白在线视频| 国产亚洲精品一区二区www | www.精华液| 国产深夜福利视频在线观看| av网站免费在线观看视频| 免费一级毛片在线播放高清视频 | 黑人欧美特级aaaaaa片| 国产亚洲av片在线观看秒播厂| 亚洲人成电影观看| 国产成+人综合+亚洲专区| 一本一本久久a久久精品综合妖精| av片东京热男人的天堂| 国产亚洲一区二区精品| 久久人妻熟女aⅴ| 脱女人内裤的视频| 日韩电影二区| bbb黄色大片| 99热全是精品| 中文字幕另类日韩欧美亚洲嫩草| 青青草视频在线视频观看| 啦啦啦免费观看视频1| 免费在线观看黄色视频的| 水蜜桃什么品种好| 国产有黄有色有爽视频| 国产精品一区二区免费欧美 | 国产精品 欧美亚洲| 久久亚洲精品不卡| 老司机福利观看| 欧美黑人精品巨大| 日韩中文字幕视频在线看片| 国产亚洲av片在线观看秒播厂| 爱豆传媒免费全集在线观看| 亚洲成人免费av在线播放| 各种免费的搞黄视频| 欧美精品高潮呻吟av久久| 老司机福利观看| 美女中出高潮动态图| 日本猛色少妇xxxxx猛交久久| av欧美777| 欧美中文综合在线视频| 男女午夜视频在线观看| 精品国产一区二区久久| 午夜精品国产一区二区电影| 男人操女人黄网站| 久久久久久久大尺度免费视频| 国产一区二区三区av在线| 欧美日韩av久久| 天堂中文最新版在线下载| 日韩免费高清中文字幕av| 成在线人永久免费视频| 美国免费a级毛片| 亚洲欧美一区二区三区黑人| 免费日韩欧美在线观看| 国产福利在线免费观看视频| 午夜日韩欧美国产| 色94色欧美一区二区| 男男h啪啪无遮挡| 国产一区二区激情短视频 | 日韩欧美一区二区三区在线观看 | 亚洲五月色婷婷综合| 老鸭窝网址在线观看| 亚洲精品一卡2卡三卡4卡5卡 | 国产精品一区二区在线不卡| 欧美黑人精品巨大| 国产高清videossex| 中文字幕人妻丝袜一区二区| 啦啦啦视频在线资源免费观看| 国产av精品麻豆| 亚洲va日本ⅴa欧美va伊人久久 | 国产成人欧美在线观看 | 精品高清国产在线一区| 国产有黄有色有爽视频| 国产在视频线精品| 亚洲七黄色美女视频| 亚洲专区字幕在线| 中文字幕人妻丝袜制服| 色婷婷久久久亚洲欧美| 中亚洲国语对白在线视频| 欧美成人午夜精品| 两性夫妻黄色片| 男人舔女人的私密视频| 国产国语露脸激情在线看| 亚洲少妇的诱惑av| 精品久久蜜臀av无| 日韩欧美一区视频在线观看| 国产精品 欧美亚洲| 人妻一区二区av| 看免费av毛片| 久久久国产精品麻豆| xxxhd国产人妻xxx| 99国产精品免费福利视频| 国产精品一区二区在线不卡| avwww免费| 欧美日韩亚洲国产一区二区在线观看 | 好男人电影高清在线观看| 黄片大片在线免费观看| 美女视频免费永久观看网站| 香蕉国产在线看| 久久久久久久大尺度免费视频| 最黄视频免费看| videos熟女内射| av网站在线播放免费| 精品人妻在线不人妻| 久久ye,这里只有精品| 亚洲视频免费观看视频| 亚洲欧洲精品一区二区精品久久久| 久热这里只有精品99| 欧美另类一区| 男女床上黄色一级片免费看| 色视频在线一区二区三区| www.av在线官网国产| 午夜日韩欧美国产| 亚洲国产精品一区二区三区在线| 九色亚洲精品在线播放| 高清黄色对白视频在线免费看| 一级a爱视频在线免费观看| 嫁个100分男人电影在线观看| 亚洲国产中文字幕在线视频| 国产又色又爽无遮挡免| 亚洲 欧美一区二区三区| 亚洲人成77777在线视频| 女性被躁到高潮视频| a在线观看视频网站| 国产欧美日韩一区二区三区在线| 夜夜夜夜夜久久久久| 亚洲精品久久成人aⅴ小说| 欧美久久黑人一区二区| 视频区欧美日本亚洲| 欧美性长视频在线观看| 亚洲一区二区三区欧美精品| 美女视频免费永久观看网站| 99久久精品国产亚洲精品| 国产淫语在线视频| 9色porny在线观看| 成人亚洲精品一区在线观看| 欧美国产精品va在线观看不卡| 久久精品成人免费网站| 婷婷色av中文字幕| 国产成人av教育| 国产成人系列免费观看| 欧美精品av麻豆av| 国产精品二区激情视频| 国产成人a∨麻豆精品| 午夜福利免费观看在线| 国产亚洲精品一区二区www | 亚洲三区欧美一区| 三级毛片av免费| 巨乳人妻的诱惑在线观看| 免费久久久久久久精品成人欧美视频| 日韩欧美一区视频在线观看| 国产人伦9x9x在线观看| 99re6热这里在线精品视频| 精品国产乱子伦一区二区三区 | 看免费av毛片| 国产一区二区三区在线臀色熟女 | 日韩制服丝袜自拍偷拍|