CN1223198C - 用于容错流分离的系统和方法 - Google Patents

用于容错流分离的系统和方法 Download PDF

Info

Publication number
CN1223198C
CN1223198C CN01814881.6A CN01814881A CN1223198C CN 1223198 C CN1223198 C CN 1223198C CN 01814881 A CN01814881 A CN 01814881A CN 1223198 C CN1223198 C CN 1223198C
Authority
CN
China
Prior art keywords
separator
main root
leaf
stream
logic
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
CN01814881.6A
Other languages
English (en)
Other versions
CN1449626A (zh
Inventor
R·斯洛斯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Intel Corp
Original Assignee
Intel Corp
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 Intel Corp filed Critical Intel Corp
Publication of CN1449626A publication Critical patent/CN1449626A/zh
Application granted granted Critical
Publication of CN1223198C publication Critical patent/CN1223198C/zh
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/22Alternate routing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/16Multipoint routing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/24Multipath
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/24Multipath
    • H04L45/243Multipath using M+N parallel active paths
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network arrangements or protocols for supporting network services or applications
    • H04L67/01Protocols
    • H04L67/10Protocols in which an application is distributed across nodes in the network
    • H04L67/1001Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
    • H04L67/1004Server selection for load balancing
    • H04L67/1008Server selection for load balancing based on parameters of servers, e.g. available memory or workload
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network arrangements or protocols for supporting network services or applications
    • H04L67/01Protocols
    • H04L67/10Protocols in which an application is distributed across nodes in the network
    • H04L67/1001Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
    • H04L67/1029Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers using data related to the state of servers by a load balancer
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network arrangements or protocols for supporting network services or applications
    • H04L67/01Protocols
    • H04L67/10Protocols in which an application is distributed across nodes in the network
    • H04L67/1001Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
    • H04L67/1034Reaction to server failures by a load balancer
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/21Server components or server architectures
    • H04N21/222Secondary servers, e.g. proxy server, cable television Head-end
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/643Communication protocols
    • H04N21/64307ATM
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/643Communication protocols
    • H04N21/64322IP
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/647Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
    • H04N21/64723Monitoring of network processes or resources, e.g. monitoring of network load
    • H04N21/64738Monitoring network characteristics, e.g. bandwidth, congestion level
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/16Analogue secrecy systems; Analogue subscription systems
    • H04N7/173Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17345Control of the passage of the selected programme
    • H04N7/17354Control of the passage of the selected programme in an intermediate station common to a plurality of user terminals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network arrangements or protocols for supporting network services or applications
    • H04L67/01Protocols
    • H04L67/10Protocols in which an application is distributed across nodes in the network
    • H04L67/1001Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network arrangements or protocols for supporting network services or applications
    • H04L67/01Protocols
    • H04L67/10Protocols in which an application is distributed across nodes in the network
    • H04L67/1001Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
    • H04L67/10015Access to distributed or replicated servers, e.g. using brokers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Hardware Redundancy (AREA)
  • Computer And Data Communications (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

本发明描述了一系统,该系统包括:一主根分离器,用来将从上游服务器传送的数据流分离成多个叶分离器流;多个叶分离器,用来将每个叶分离器流分离成多个终端用户流,其中该多个叶分离器中的一个或多个就是一备份的根分离器;以及根分离器重新分配逻辑,用于将一个备份根分离器重新分配作为一新的主根分离器,以对检测到该主根分离器的问题作出反应。还介绍了一方法,包括:检测主根分离器,以确保该主根分离器运行在预定的参数内,该主根分离器将一单个的数据流分离成传送到多个叶分离器的多个数据流;以及将一个叶分离器重新分配成一新的主根分离器,以对检测到该主根分离器不运行在该预定的参数内的情形作出反应。

Description

用于容错流分离的系统和方法
发明领域
本发明一般涉及网络服务的领域。更具体的说,本发明涉及一用于提供容错数据通信的改进体系结构。
相关技术介绍
如对该技术所知道的那样,流式是一种实时地在网上播放声频和/或视频内容的机构,通常用在网络带宽有限的情形中。基本的流式技术概念是,从其源接收整个文件之前,在目的地(例如,客户)开始从缓冲器回放基础流式文件。
传统的网络流式系统示于图1中。如图所示,一个或多个配置有流式应用软件,如RealNetworks开发的RealPlayer或Microsoft公司开发的Windows Media Player的客户150,160与一个或多个流式服务器110,111,...N在网络100(例如,因特网)上通信。该组流式服务器110,111,...N被一起安置在出现点(point ofpresence)(“POP”)的位置130上。流式服务器110,111,...N中的每一个都可存储该相同流式数据的拷贝,或可存储不同的流式数据,这取决于在该POP位置130处的配置。
在操作中,当客户机150从在该POP位置130的服务器要求特定的流式文件时,该要求就被负荷平衡器模块120所接收,该负荷平衡器模块再将该要求发送给适当的流式服务器111。哪个服务器是“适当的”可能取决于所要求的文件存储的地方,每个服务器110,111,...N上的负荷,和/或该客户机所要求的流式类型(例如,Windows Media格式或RealPlayer格式)。一旦该文件被适当服务器-在本例中为服务器111-识别,则它就通过网络100流向该要求的客户机150(由流140表示)。
附图简介
从下面的详述并结合下面的附图就可获得对本发明的更好理解。其中:
图1图示出一用于在网络上进行内容流动的现行技术系统和方法。
图2图示出一包括本发明要素的示范性网络体系结构。
图3图示出一包括本发明要素的示范性计算机体系结构。
图4图示出由本发明的一个实施例支持的各种流源。
图5图示出在本发明的一个实施例中流分离的实现。
图6图示出一按照本发明的一个实施例用来实现备份根分离器的系统。
图7图示出一按照本发明的一个实施例用来实现备份根分离器的方法。
发明详述
在下面的描述中,为了说明的目的,阐述了很多的具体细节,以便对本发明提供一彻底的理解。但是,对于本技术的普通人员来说将会显而易见是,没有这些具体细节的某些,本发明也是可以实施的。在其它的例子中都以方框图的形式画出了很熟悉的一些结构和装置,以避免使本发明的基础原理晦涩难懂。
示范性网络结构
本发明的要素可包括在如图2所示的一种多层网络体系结构200中,该结构包括一个或多个数据中心220-222,多个“中间”出现点(“POP”)节点230-234(这里也叫做“专用网络进入点”或“P-NAPs”),和多个“边缘(edge)”POP节点240-245(这里也叫做“因特网服务提供商协同定位(Co-location)”位置或“ISP Co-Lo”位置)。
按照图2所示实施例,数据中心220-222,中间POP 230-234和/或边缘POP 240-245的每一个都是由网络服务器组构成,各种类型的网络内容可被存储在这些服务器上并传送到终端用户250,例如,各种类型的网络内容可包括网页,网络新闻数据,电子邮件数据,文件传输协议(“FTP”)文件,和实况及即时(live&on-demand)的多媒体流文件。但是,应该指出本发明的基础原理却可利用各种不同类型的网络内容来加以实践。
安放在该数据中心220-222和POP 230-245的服务器可利用各种通信通道相互通信和与终端用户250通信,例如,各种通信通道包括数字信号(“DS”)通道(例如DS-3/T-3,DS-1/T1),同步光网(“SONET”)通道(例如,OC-3/STS-3),综合服务数字网络(“ISDN”)通道,数字用户链路(“DSL”)通道,电缆调制解调器通道,以及各种无线通信通道,包括卫星广播和蜂窝电话。
此外,各种网络协议都可用来实现该系统的方方面面,包括,例如,异步传输模式(“ATM”),以太网,和令牌环网(Token Ring);以及传输控制协议/因特网协议(“TCP/IP”),网间分组交换(“IPX”),AppleTalk和DEC网络(DECnet)(在网络/传输层面)。但应指出,本发明的原理并不限于任何具体的通信通道或协议。
在一个实施例中,用来存储与分配的网络内容相关的信息的一数据库被保持在数据中心220-222(也可能在POP节点230-234,240-245)的服务器上。这信息可包括当前包含网络信息拷贝的不同的POP位置。一个实施例中的该数据库是一分布式数据库(例如,分布于多个服务器上),并可运行关系数据库管理系统(RDBMS)的实例,如MicrosoftTMSQL-Server,OracleTM等等。
示范性的计算机体系结构
在简明介绍了使用本发明的各种要素的示范网络体系结构后,现在参考附图3来介绍计算机系统300,该计算机系统代表用来实现本发明要素的示范性客户机和服务器。
计算机系统的一个实施例300包括一系统总线320用于传输信息,和一与总线320耦连的处理器310用于处理信息。该计算机系统还包括一随机存储器(RAM)或其它的动态存储装置325(这里叫做“主存储器”),与总线320耦连用来存储信息和由处理器310执行的指令。主存储器325还可用来在处理器310执行指令过程中存储临时变量或其它的中间信息。计算机系统300还包括与总线320耦连的只读存储器(ROM)和/或其它的静态存储装置326,用来存储静态信息和由处理器310使用的指令。
数据存储装置327,如磁盘或光盘和它的相应驱动器也可与计算机系统300耦连用来存储信息和指令。该计算机系统300还可通过一I/O接口330与第二I/O总线350耦连。多个I/O装置都可与I/O总线350耦连,包括显示装置343,和/或输入装置(例如,一字母数字输入装置342和/或一光标控制装置341)。
该通信装置340被用来通过一网络100访问其它的计算机(服务器或客户机)。该通信装置340可包括一调制解调器,网络接口卡,或其它熟悉的接口装置,如用来连接以太网,令牌环网,或其它类型的计算机网络。
发明实施例
流分离
现将就图4和图5来对为使实况及即时的声频/视频内容流动而配置的系统的实施例进行描述。如图4所示,一个实施例从各种源接收和处理进入的声频/视频内容,这些源包括,但不限于,在卫星通信链路410上广播的实况的或记录的信号401;通过视频会议系统411提供的实况信号402;和/或在专用因特网协议(“IP”)通信链路412上传送的实况或记录信号403。但是,应该指出,各种其它的网络协议(就是除IP之外的)都可使用而仍然遵从本发明的基础原理。在一个实施例中,图4所示的每个模块都驻留在一数据中心220上。
系统的获取和管理模块(“SAM”)420按要求开通和关闭在各种源401-403之间的通信对话。例如,当内容提供者要建立一新的实况流对话时,该SAM 420将开通一新的连接来处理进入的声频/视频数据(例如,在确定该内容提供者有权建立该连接后)。
该SAM模块420将根据进入的信号是否已被编码(例如,被内容提供者编码)和/或根据是否该信号由“实况”或“即时(on demand)”的内容构成来对该信号进行不同的处理。例如,如果信号未经内容提供者编码(例如,该信号可在该数据中心以模拟格式或以非流式的数字格式被接收),则该SAM模块420将把该信号导向一个或多个流式的编码器模块430,它将该流按一特定的数字格式编码(例如,WindowsMedia格式,Rea G2TM格式,...等)。
如果进入的信号是实况的,则该流式编码器430就将该编码信号直接地传送到一个或多个流式始发服务器(streaming originserver)510(它像下述那样将该信号分配给各个POP节点)和/或传送到该数据中心220的一个或多个内容存储装置431。但是,如果该进入的信号是一即时的信号(也就是被存储并被客户机随时查看的信号),则该流式编码器430就将该编码信号直接传送到内容存储装置431。同样,如果该流式信号已被按特定的流式格式编码,则它就可被直接传送到该内容存储装置431。
当将新的声频/视频流式内容添加到该内容存储装置431中时,该SAM模块420就使一存储数据库430因此被更新(例如,通过一内容传送子系统)。在一个实施例中的该存储数据库430是一分布式数据库,因为它分布和存放在遍布该网络的各个POP位置上所以该数据库可跟踪所有的网络内容。
如图5所示,该编码信号从该流式始发服务器510被传送到位于各个I-POP节点230-232和E-POP节点240-242的流式分离器520-522,530-532。使用如图示那样的流式分离器来保存一基本量的网络带宽。例如,在所示的实施例中,每个流式分离器520-522,530-532都从上游的服务器只接收一单一的实况声频/视频内容流,然后将该流分成几个独立的流。这种配置对于不支持多广播的流式配置特别有用。
此外,如图5所示,在一多层的分层结构中使用流式分离器可减小该结构中每层上的带宽。例如,来自实况流式事件的单一流可以从一流式始发服务器510传送到I-POP流式分离器521。该流式分离器521然后可向每个E-POP流式分离器530-532传送一单一的流,然后这些E-POP流式分离器可再将该实况事件传送到多个终端用户540-548。因此该数据中心220和I-POP231之间的网络路径仅仅加载了一单一的流,而在该I-POP231和该E-POP240-242之间的三个网络路径的每一条上都仅加载了一单一的流。该进入的流那时就在该E-POP240-242的每一个上被分离,以便将该实况事件提供给多个终端用户540-548。
容错流分离
如图6所示,本发明的一个实施例包括一个或多个配置在POP位置620处的根分离器630,以便从始发服务器接收流,并将该流分配给多个叶分离器631-635。每个叶分离器631-635服务于多个终端用户650,其方法是进一步将从该根分离器630接收的每个流分离成另一些多个终端用户流。
从图6可以看出,对于一具体的实况或计划的流事件来说,该流式编码器530,该始发服务器510和该根分离器630都代表单个的故障点。在一个实施例中,在该数据中心200的部件(例如,该始发服务器510和流式编码器530)上的潜在故障可通过对每个实况/计划的事件分配冗余编码器/始发服务器对的组合来处理。但是在某些情形,这种冗余水平在各个POP位置620上都是不切实际的(例如,由于在该位置上有限的媒体资源,有限而昂贵的机架空间,...等)。照此,在一个实施例中,可实施一更有效的机构来在这些POP位置620上提供容错(fault tolerance)。
如图6所示,在一个实施例中,一个或多个叶分离器(例如叶分离器631)都作为对主根分离器630的备份配置的。在这实施例中,该根分离器的健康状态不断地受监测,监测的进行通过监测子系统,其可驻留在负荷平衡器模块625,重定向子系统610,或作为分离的监测模块和数据中心和/或POP位置620。
在一实施例中,配置了该根分离器630,以便按预定时间间隔向该监测子系统提供刷新。这可能由代理640来实现,该代理不断在该根分离器630上运行和配置,以便与该监测子系统通信。在这个实施例中的周期性的更新起着“心跳”的作用,它向该监测子系统表明,该根分离器正在正常参数内运行。如果该监测子系统一个或多个周期不接收更新,则就可确定,该根分离器已变成不起作用了,并指派该备份的根分离器631作新的主根分离器。在一实施例中,在该备份的根分离器631上运行的该代理641完成重新配置的过程。另外,或此外,该监测子系统可积极地轮询在根分离器630上运行的代理640,以便确认该根分离器630是在可靠地运行。
现在将就图7的流程图来对图6所示系统的一实施例的运行进行描述。在710上,用户企图查看具体的实况或计划的流式事件(例如,万维网广播)。该用户的要求被重定向子系统610接收和处理,该重定向子系统(在715处)将用户导向该流将从其发送的一具体的POP位置620(例如,通过使引导该用户的流式应用的路径返回那个POP位置620)。
在720,驻留在该POP位置620上的负荷平衡器模块625从在该位置的一组叶分离器631-635中选择一具体的叶分离器(例如,分离器633)。在一个实施例中,该负荷平衡器625是一层4开关(layer 4switch),它不断地监测在每个叶分离器631-635上的负荷,并分派新的用户要求给最少负荷的分离器。在这实施例中,该层4开关可用一虚拟的因特网协议(“VIP”)地址来标识,该地址包含在该重定向子系统610的发送路径中。
在725,一根分离器故障被该监测子系统检测(例如,通过上述的一种或多种故障检测技术)。结果,该监测子系统引导该备份的根分离器631(例如,通过该备份代理641),以便将本身重新配置成新的主根分离器630。此外,该监测子系统和/或该备份代理641引导该负荷平衡器625,以便从受该负荷平衡器模块625监测的叶分离器631-635的组群中去掉该备份根分离器631(在730处)。
应该指出,该新的主根分离器631,负荷平衡器625,叶分离器632-625,和/或重定向子系统610在根分离器630发生故障之后都可被重新不同地配置,这取决于该系统支持的流的格式。当用户要求按RealPlay流格式(例如,通过驻留在该客户计算机上的RealPlay的应用程序)编码的文件,则该重定向子系统就将一综合路径(comprehensive path)传送给该用户,规定该流式文件和服务器的位置,该数据流将通过该位置沿它的路径送达该用户。例如,一路径,如,”rtsp:\\<vip>\Split\<Root Server IP>\Split\<OriginServer IP>\<Encorder IP>\live_stream.rm”就可被传送到该客户机的流式应用程序,标识该负荷平衡器625,该根分离器630,该始发服务器510,和该编码器530的虚拟IP地址以及该实际流式文件名(“live_stream.rm”)。因此,当如上所述该备份的根服务器631被重新配置成主根服务器630时,则后来被该重定向子系统610传送给用户的该路径就被更新,以便反映该根分离器在该<Root Server IP>域内的新IP地址(例如,以前的备份服务器631的IP地址)。相反,如果该系统被配置来支持Windows Media Technologies(“WMT”)流式格式,则在流式路径内的每个服务器在根分离器630失事之后都可能需要更新。更具体地说,在这实施例中,WMT服务器的“发布点”在每个服务器上预先都被重新配置,以便返回来导向该上游的分离器630,始发服务器510,和/或编码器530。
例如,在用户对流式内容提出请求之后,被重定向子系统610返回的一示范性的URL可看起来就像:“mms://<VIP>/<BroadcastPublishing Point(3)>”。在VIP地址后面的每个边缘分离器那时将总暴露出“广播发布点(3))”,并因此总被配置以便引用,例如,“<RootSplitter IP>/<Broadcast Publishing Point(2)>”。继续这个例子,该WMT根分离器也将依次暴露出“广播发布点(2)”,被重新配置以便参考“<Origin Server IP>/<Broadcast PublishingPoint(1)>”。最后,在一个实施例中被该WMT始发服务器510暴露的“广播发布点(1)”被从该流式编码器530接收的流所充填。
这样,在这实施例中,当该监测子系统在该主的WMT根分离器630中检测一故障时,它不应仅重新配置该负荷平衡器625来从该叶分离器组群中除去该备份根分离器631,它还应重新配置在剩余的叶分离器632-635上的所有的“广播发布点(3)”,以便它们引用该新的根分离器631。此外,该新的根分离器631应当重新被配置以便去除它的“广播发布点(3)”和现在就暴露“广播发布点(2)”,这向后导向该始发服务器510的发布点。
因此,可以看出上述配置的一个好处是,该重定向子系统610可提供相同的URL给用户,即使在主根分离器630发生故障后也是如此。那时利用新配置的一组发布点就可给该用户提供相同的流。
不管使用那种流格式,都会在735处,通过的新的主根分离器给用户提供新的流。在740处,在数据中心的操作人员被告知主根服务器发生故障。该操作人员那时可先尝试远程估计和解决问题,然后才行进到POP位置620。
本发明的实施例包括已在上面描述过的各个步骤。这些步骤可用能机器执行的指令来体现。该指令可被用来使通用和专用处理器完成某些步骤。另外,这些步骤可以用具体的硬件部件完成,该部件包含用来完成该步骤的硬连线逻辑,也可用程序计算机部件和自定义硬件部件的任一组合来完成。
作为机器可读介质的本发明的要素还可被提供来存储机器可执行的指令。该机器可读的介质可包括,但不限于:软盘,光盘,光盘只读存储器,磁-光盘,ROM,RAM,EPROM,EEPROM,磁或光卡,适于存储电子指令的传播介质或其它类型的媒体/机器可读介质。例如,本发明可作为计算机程序下载,该计算机程序可通过包含在载体或其它传播介质中的数据信号,经通信链路(例如,调制解调器或网络连接)从远程计算机(如,服务器)发送到请求的计算机(例如,客户机)。
为了说明,在整个上面的描述中,很多具体细节都进行了阐述,以便提供对本发明的透彻理解。但是对本技术的普通人员来说显而易见的是,本发明却可在没有某些这些具体细节的条件下加以实施。例如,虽然在文中对具体的流格式的上述实施例(例如,Windows Media和RealMedia)进行了描述,但与本发明的基础原理相符合的各种其它流格式也是可实现的。因此,本发明的范围和精神应按照下面的权利要求来判断。

Claims (21)

1.一种中间流送节点,包括:
主根分离器,用来将传送自上游服务器的数据流分离成多个叶分离器流;
多个叶分离器,用来将每个所述的叶分离器流分离成多个终端用户流,其中,所述的多个叶分离器中的一个或多个是备份的根分离器;及
根分离器的重新分配逻辑,当检测出所述的主根分离器出问题时,作为响应,该重新分配逻辑将一个所述的备份根分离器重新分配为新的主根分离器。
2.按权利要求1的中间流送节点,还包括一个负荷平衡器模块,用来根据所述叶分离器上的相对负荷将客户机的流送请求导向特定的叶分离器。
3.按权利要求1的中间流送节点,还包括一个重定向子系统,用来将客户机的流送请求重新导向一个特定的出现点位置。
4.按权利要求2的中间流送节点,还包括负荷平衡器的更新逻辑,当所述的备份根分离器被重新分配为主根分离器时,作为响应,该更新逻辑从所述负荷平衡器将用户的流送请求导向于其的所述的多个叶分离器中去除所述的备份叶分离器。
5.按权利要求3的中间流送节点,还包括重定向子系统更新逻辑,当所述的备份分离器被重新分配为所述新的主根分离器,作为响应,该更新逻辑通知所述重定向子系统有关所述新的主根分离器。
6.按权利要求5的中间流送节点,其中所述重定向子系统更新逻辑将所述新的主根分离器的IP地址传送给所述重定向子系统。
7.按权利要求1的中间流送节点,还包括发布点更新逻辑,当所述备份的根服务器被重新分配为所述主根服务器时,作为响应,该更新逻辑更新在所述系统中的发布点。
8.按权利要求1的中间流送节点,还包括监测逻辑,用来监测所述的主根分离器,以便确定所述根分离器是否在正常参数范围内运行。
9.按权利要求8的中间流送节点,其中,所述的监测逻辑从所述主根分离器接收周期性心跳信号,并且,在一个或多个周期未接收到所述周期性心跳信号就表示所述的主根分离器发生问题。
10.按权利要求8的中间流送节点,其中,所述的监测逻辑向所述主根分离器传送监测信号,并且,未接收到来自所述根分离器的响应就表示所述主根分离器出现问题。
11.一种计算机化的方法,包括:
监测主根分离器,以便确保所述主根分离器运行在预定的参数范围内,所述主根分离器将传送自上游服务器的单个数据流分离成向多个叶分离器传送的多个数据流;以及
当检测到所述主根分离器未运行在所述预定参数范围内时,作为响应,将一个所述的叶分离器重新分配为新的主根分离器。
12.按权利要求11的计算机化的方法,还包括:
更新负荷平衡器模块,以表示所述的叶分离器被重新分配为主根分离器,所述的负荷平衡器模块用于根据每个所述的叶分离器上的负荷将用户的流送请求分配给一个或多个所述的叶分离器。
13.按权利要求11的计算机化的方法,还包括:
更新重定向子系统,以表示所述的叶分离器被重新分配为主根分离器,所述的重定向子系统用于将客户机的流送请求导向一个特定的出现点位置。
14.按权利要求13的计算机化的方法,还包括:
更新在所述出现点位置处的负荷平衡器模块,以表示所述的叶分离器被重新分配为新的主根分离器,所述的负荷平衡器模块用于根据每个所述的叶分离器上的负荷来将用户的流送请求分配给一个或多个在所述出现点位置处的所述叶分离器。
15.按权利要求13的计算机化的,方法,其中更新所述重定向系统包括将所述的新的主根分离器的IP地址传送给所述的重定向子系统。
16.按权利要求11的计算机化的方法,还包括:
更新一个或多个广播发布点,以表示所述新的主根分离器。
17.一种系统,包括:
一个监测子系统,用以检测主根分离器是否运行在预定的工作参数下,该主根分离器将接收自上游服务器的数据流分离成多个叶分离器数据流;以及
根分离器重新分配逻辑,当检测到所述主根分离器是运行在所述预定工作参数之外时,作为响应,该重新分配逻辑重新分配一个备份根分离器作为新的主根分离器。
18.按权利要求17的系统,其中,所述的备份根分离器也是叶分离器,用来从所述主根分离器接收数据流,并且当所述的主根分离器是运行在所述的预定工作参数下时将所述的叶分离器流分离成多个用户流。
19.按权利要求17的系统,其中,通过周期性地接收一个传送自所述主根分离器的信号,所述监测子系统检测所述主根分离器是否运行在预定工作参数下。
20.按权利要求18的系统,还包括负荷平衡器逻辑,用于根据所述叶分离器上的相对于一个或多个另外的叶分离器的相对负荷,将客户机流送请求导向所述叶分离器。
21.按权利要求20的系统,还包括重定向子系统,用来将客户机的流送请求重新导向驻留有所述的负荷平衡器和一个或多个的所述叶分离器的一个特定的出现点位置。
CN01814881.6A 2000-06-30 2001-06-14 用于容错流分离的系统和方法 Expired - Fee Related CN1223198C (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/608,417 2000-06-30
US09/608,417 US7020709B1 (en) 2000-06-30 2000-06-30 System and method for fault tolerant stream splitting

Publications (2)

Publication Number Publication Date
CN1449626A CN1449626A (zh) 2003-10-15
CN1223198C true CN1223198C (zh) 2005-10-12

Family

ID=24436409

Family Applications (1)

Application Number Title Priority Date Filing Date
CN01814881.6A Expired - Fee Related CN1223198C (zh) 2000-06-30 2001-06-14 用于容错流分离的系统和方法

Country Status (6)

Country Link
US (1) US7020709B1 (zh)
CN (1) CN1223198C (zh)
AU (1) AU2001268505A1 (zh)
GB (1) GB2381428B (zh)
TW (1) TW517499B (zh)
WO (1) WO2002003704A1 (zh)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060259607A1 (en) * 2001-09-13 2006-11-16 Network Foundation Technologies, Llc System and method for distributing data over a computer network
US20040088380A1 (en) * 2002-03-12 2004-05-06 Chung Randall M. Splitting and redundant storage on multiple servers
US7373414B2 (en) * 2002-08-29 2008-05-13 Amx Llc Multi-media system and method for simultaneously delivering multi-media data to multiple destinations
US8054849B2 (en) * 2005-05-27 2011-11-08 At&T Intellectual Property I, L.P. System and method of managing video content streams
KR100979364B1 (ko) * 2005-11-24 2010-08-31 지티이 코포레이션 자동 교환 광통신망에서 다중송출 서비스 접속의 보호 및 복원 방법
WO2010136699A2 (fr) * 2009-05-29 2010-12-02 France Telecom Technique de distribution d'un contenu vers un utilisateur
US8291258B2 (en) 2010-01-08 2012-10-16 Juniper Networks, Inc. High availability for network security devices
US8788683B2 (en) * 2011-08-17 2014-07-22 The Nasdaq Omx Group, Inc. Scalable transcoding for streaming audio
US10437690B2 (en) * 2015-01-13 2019-10-08 Sital Technology Ltd. Fault tolerant communication system
CN105282269B (zh) * 2015-11-03 2018-07-06 中国互联网络信息中心 一种本地dns根服务器的配置方法和服务方法

Family Cites Families (106)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8513542D0 (en) 1985-05-29 1985-07-03 Gen Electric Co Plc Fibre optic coupler
EP0498472B1 (en) 1986-08-12 1994-10-12 Hitachi, Ltd. Microprocessor for retrying data transfer
US4920432A (en) 1988-01-12 1990-04-24 Eggers Derek C System for random access to an audio video data library with independent selection and display at each of a plurality of remote locations
US4866712A (en) 1988-02-19 1989-09-12 Bell Communications Research, Inc. Methods and apparatus for fault recovery
US4949248A (en) 1988-07-15 1990-08-14 Caro Marshall A System for shared remote access of multiple application programs executing in one or more computers
US4949187A (en) 1988-12-16 1990-08-14 Cohen Jason M Video communications system having a remotely controlled central source of video and audio data
US5544347A (en) 1990-09-24 1996-08-06 Emc Corporation Data storage system controlled remote data mirroring with respectively maintained data indices
US5172413A (en) 1990-12-20 1992-12-15 Sasktel Secure hierarchial video delivery system and method
US5253275A (en) 1991-01-07 1993-10-12 H. Lee Browne Audio and video transmission and receiving system
JPH04245751A (ja) 1991-01-31 1992-09-02 Nec Corp イベント処理分散型網監視システム
US5253341A (en) 1991-03-04 1993-10-12 Rozmanith Anthony I Remote query communication system
EP0529864B1 (en) 1991-08-22 2001-10-31 Sun Microsystems, Inc. Network video server apparatus and method
US5528281A (en) 1991-09-27 1996-06-18 Bell Atlantic Network Services Method and system for accessing multimedia data over public switched telephone network
US5247347A (en) 1991-09-27 1993-09-21 Bell Atlantic Network Services, Inc. Pstn architecture for video-on-demand services
WO1993009494A1 (en) * 1991-10-28 1993-05-13 Digital Equipment Corporation Fault-tolerant computer processing using a shadow virtual processor
US5404465A (en) * 1992-03-18 1995-04-04 Aeg Transportation Systems, Inc. Method and apparatus for monitoring and switching over to a back-up bus in a redundant trainline monitor system
US5371532A (en) 1992-05-15 1994-12-06 Bell Communications Research, Inc. Communications architecture and method for distributing information services
US5291554A (en) 1992-05-28 1994-03-01 Tv Answer, Inc. Shared-price custom video rentals via interactive TV
US6026452A (en) 1997-02-26 2000-02-15 Pitts; William Michael Network distributed site cache RAM claimed as up/down stream request/reply channel for storing anticipated data and meta data
US5442389A (en) 1992-12-28 1995-08-15 At&T Corp. Program server for interactive television system
US5508732A (en) 1993-03-22 1996-04-16 International Business Machines Corporation Data server, control server and gateway architecture system and method for broadcasting digital video on demand
EP0625856B1 (en) 1993-05-19 1998-03-04 Alcatel Video on demand network
US5550982A (en) 1993-06-24 1996-08-27 Starlight Networks Video application server
US5414455A (en) 1993-07-07 1995-05-09 Digital Equipment Corporation Segmented video on demand system
US5442390A (en) 1993-07-07 1995-08-15 Digital Equipment Corporation Video on demand with memory accessing and or like functions
US5448723A (en) * 1993-10-15 1995-09-05 Tandem Computers Incorporated Method and apparatus for fault tolerant connection of a computing system to local area networks
JPH07175868A (ja) 1993-10-15 1995-07-14 Internatl Business Mach Corp <Ibm> デジタル情報を媒体に出力するための方法およびシステム
JPH07212712A (ja) 1993-10-29 1995-08-11 Eastman Kodak Co 階層的な画像記憶及び取出しシステムにおいてディジタル透かし模様を付加及び除去する方法及び装置
CA2130395C (en) 1993-12-09 1999-01-19 David G. Greenwood Multimedia distribution over wide area networks
US5475615A (en) 1993-12-23 1995-12-12 U S West Advanced Technologies, Inc. Method and system for sizing interactive video delivery systems
US5544327A (en) * 1994-03-01 1996-08-06 International Business Machines Corporation Load balancing in video-on-demand servers by allocating buffer to streams with successively larger buffer requirements until the buffer requirements of a stream can not be satisfied
US5463768A (en) 1994-03-17 1995-10-31 General Electric Company Method and system for analyzing error logs for diagnostics
US5544313A (en) 1994-05-11 1996-08-06 International Business Machines Corporation Baton passing optimization scheme for load balancing/configuration planning in a video-on-demand computer system
US5768521A (en) 1994-05-16 1998-06-16 Intel Corporation General purpose metering mechanism for distribution of electronic information
JP2601189B2 (ja) 1994-05-20 1997-04-16 日本電気株式会社 ビデオ・オン・デマンドシステム
US5515511A (en) 1994-06-06 1996-05-07 International Business Machines Corporation Hybrid digital/analog multimedia hub with dynamically allocated/released channels for video processing and distribution
US5519435A (en) 1994-09-01 1996-05-21 Micropolis Corporation Multi-user, on-demand video storage and retrieval system including video signature computation for preventing excessive instantaneous server data rate
US5614940A (en) 1994-10-21 1997-03-25 Intel Corporation Method and apparatus for providing broadcast information with indexing
US6446224B1 (en) 1995-03-03 2002-09-03 Fujitsu Limited Method and apparatus for prioritizing and handling errors in a computer system
JP3200661B2 (ja) 1995-03-30 2001-08-20 富士通株式会社 クライアント/サーバシステム
JP3375245B2 (ja) * 1995-04-26 2003-02-10 インターナショナル・ビジネス・マシーンズ・コーポレーション 耐障害性マルチメディア・プログラム配布のための装置
US6181867B1 (en) 1995-06-07 2001-01-30 Intervu, Inc. Video storage and retrieval system
US6003030A (en) 1995-06-07 1999-12-14 Intervu, Inc. System and method for optimized storage and retrieval of data on a distributed computer network
US5703938A (en) 1995-08-28 1997-12-30 Mct Communications Corp. Method of optimizing access trunk configurations and system therefor
US5737495A (en) 1995-09-29 1998-04-07 Intel Corporation Method and apparatus for managing multimedia data files in a computer network by streaming data files into separate streams based on file attributes
US6061504A (en) * 1995-10-27 2000-05-09 Emc Corporation Video file server using an integrated cached disk array and stream server computers
US5832069A (en) 1995-11-17 1998-11-03 Sprint Communications Co L.P. Object oriented system for modeling telecommunications circuits to estimate the access cost for leasing selected circuits
US6233623B1 (en) 1996-01-11 2001-05-15 Cabletron Systems, Inc. Replicated resource management system for managing resources in a distributed application and maintaining a relativistic view of state
US5778187A (en) 1996-05-09 1998-07-07 Netcast Communications Corp. Multicasting method and apparatus
US6023470A (en) 1996-05-17 2000-02-08 Lee; Warren S. Point of presence (POP) for digital facsimile network with virtual POPs used to communicate with other networks
US5918013A (en) 1996-06-03 1999-06-29 Webtv Networks, Inc. Method of transcoding documents in a network environment using a proxy server
US5774660A (en) 1996-08-05 1998-06-30 Resonate, Inc. World-wide-web server with delayed resource-binding for resource-based load balancing on a distributed resource multi-node network
US5923659A (en) 1996-09-20 1999-07-13 Bell Atlantic Network Services, Inc. Telecommunications network
US6098096A (en) 1996-12-09 2000-08-01 Sun Microsystems, Inc. Method and apparatus for dynamic cache preloading across a network
US6370571B1 (en) 1997-03-05 2002-04-09 At Home Corporation System and method for delivering high-performance online multimedia services
US6298376B1 (en) 1997-03-07 2001-10-02 General Electric Company Fault tolerant communication monitor for a master/slave system
US6151632A (en) * 1997-03-14 2000-11-21 Microsoft Corporation Method and apparatus for distributed transmission of real-time multimedia information
US5923840A (en) 1997-04-08 1999-07-13 International Business Machines Corporation Method of reporting errors by a hardware element of a distributed computer system
US5987621A (en) 1997-04-25 1999-11-16 Emc Corporation Hardware and software failover services for a file server
US6314525B1 (en) * 1997-05-13 2001-11-06 3Com Corporation Means for allowing two or more network interface controller cards to appear as one card to an operating system
US6292905B1 (en) * 1997-05-13 2001-09-18 Micron Technology, Inc. Method for providing a fault tolerant network using distributed server processes to remap clustered network resources to other servers during server failure
US6112249A (en) * 1997-05-30 2000-08-29 International Business Machines Corporation Non-disruptively rerouting network communications from a secondary network path to a primary path
US6351775B1 (en) * 1997-05-30 2002-02-26 International Business Machines Corporation Loading balancing across servers in a computer network
US6112239A (en) * 1997-06-18 2000-08-29 Intervu, Inc System and method for server-side optimization of data delivery on a distributed computer network
US6678659B1 (en) 1997-06-20 2004-01-13 Swisscom Ag System and method of voice information dissemination over a network using semantic representation
US6098108A (en) 1997-07-02 2000-08-01 Sitara Networks, Inc. Distributed directory for enhanced network communication
US6067545A (en) 1997-08-01 2000-05-23 Hewlett-Packard Company Resource rebalancing in networked computer systems
US6085193A (en) 1997-09-29 2000-07-04 International Business Machines Corporation Method and system for dynamically prefetching information via a server hierarchy
US6421714B1 (en) 1997-10-14 2002-07-16 Lucent Technologies Efficient mobility management scheme for a wireless internet access system
US6240462B1 (en) 1997-10-14 2001-05-29 At&T System for providing enhanced grade of service for connections over a large network
US6070191A (en) 1997-10-17 2000-05-30 Lucent Technologies Inc. Data distribution techniques for load-balanced fault-tolerant web access
US6173411B1 (en) * 1997-10-21 2001-01-09 The Foxboro Company Method and system for fault-tolerant network connection switchover
US6016512A (en) 1997-11-20 2000-01-18 Telcordia Technologies, Inc. Enhanced domain name service using a most frequently used domain names table and a validity code table
US6266335B1 (en) 1997-12-19 2001-07-24 Cyberiq Systems Cross-platform server clustering using a network flow switch
US6032194A (en) * 1997-12-24 2000-02-29 Cisco Technology, Inc. Method and apparatus for rapidly reconfiguring computer networks
US6011881A (en) 1997-12-29 2000-01-04 Ifos, Intelligent Fiber Optic Systems Fiber-optic tunable filter
WO1999048246A1 (en) 1998-03-16 1999-09-23 Reuters America Incorporated Method, apparatus, and medium for minimal time multicast graft/join restoration
US6233618B1 (en) 1998-03-31 2001-05-15 Content Advisor, Inc. Access control of networked data
US6178445B1 (en) 1998-03-31 2001-01-23 International Business Machines Corporation System and method for determining which processor is the master processor in a symmetric multi-processor environment
US6115752A (en) 1998-05-21 2000-09-05 Sun Microsystems, Inc. System and method for server selection for mirrored sites
US6122752A (en) 1998-06-19 2000-09-19 At&T Corporation System and method for characterizing and repairing intelligent systems
US6438595B1 (en) * 1998-06-24 2002-08-20 Emc Corporation Load balancing using directory services in a data processing system
US6182143B1 (en) * 1998-06-25 2001-01-30 International Business Machines Corporation Publish and subscribe data processing apparatus, method and computer program product with use of a stream to distribute local information between neighbors in a broker structure
US6078960A (en) * 1998-07-03 2000-06-20 Acceleration Software International Corporation Client-side load-balancing in client server network
US6427163B1 (en) 1998-07-10 2002-07-30 International Business Machines Corporation Highly scalable and highly available cluster system management scheme
US6108703A (en) 1998-07-14 2000-08-22 Massachusetts Institute Of Technology Global hosting system
US6195680B1 (en) * 1998-07-23 2001-02-27 International Business Machines Corporation Client-based dynamic switching of streaming servers for fault-tolerance and load balancing
JP3786328B2 (ja) 1998-07-27 2006-06-14 株式会社日立製作所 サーバおよび通信制御方法
US6317787B1 (en) 1998-08-11 2001-11-13 Webtrends Corporation System and method for analyzing web-server log files
US6442588B1 (en) 1998-08-20 2002-08-27 At&T Corp. Method of administering a dynamic filtering firewall
US6363416B1 (en) 1998-08-28 2002-03-26 3Com Corporation System and method for automatic election of a representative node within a communications network with built-in redundancy
US6505240B1 (en) * 1998-08-31 2003-01-07 Trevor I. Blumenau Ameliorating bandwidth requirements for the simultaneous provision of multiple sets of content over a network
US6161008A (en) 1998-11-23 2000-12-12 Nortel Networks Limited Personal mobility and communication termination for users operating in a plurality of heterogeneous networks
US6466949B2 (en) 1998-11-23 2002-10-15 Myway.Com Corporation Performing event notification in a database having a distributed web cluster
US6389462B1 (en) 1998-12-16 2002-05-14 Lucent Technologies Inc. Method and apparatus for transparently directing requests for web objects to proxy caches
US6298455B1 (en) * 1998-12-29 2001-10-02 International Business Machines Corporation Publish and subscribe data processing with failover using cascaded sequence numbers
US6564380B1 (en) * 1999-01-26 2003-05-13 Pixelworld Networks, Inc. System and method for sending live video on the internet
US6345294B1 (en) 1999-04-19 2002-02-05 Cisco Technology, Inc. Methods and apparatus for remote configuration of an appliance on a network
US6487555B1 (en) 1999-05-07 2002-11-26 Alta Vista Company Method and apparatus for finding mirrored hosts by analyzing connectivity and IP addresses
US6408407B1 (en) 1999-06-03 2002-06-18 Ncr Corporation Methods and apparatus for delegated error handling
US6415323B1 (en) * 1999-09-03 2002-07-02 Fastforward Networks Proximity-based redirection system for robust and scalable service-node location in an internetwork
US6351776B1 (en) 1999-11-04 2002-02-26 Xdrive, Inc. Shared internet storage resource, user interface system, and method
US6484143B1 (en) 1999-11-22 2002-11-19 Speedera Networks, Inc. User device and system for traffic management and content distribution over a world wide area network
US6415368B1 (en) 1999-12-22 2002-07-02 Xerox Corporation System and method for caching
US6665726B1 (en) * 2000-01-06 2003-12-16 Akamai Technologies, Inc. Method and system for fault tolerant media streaming over the internet
US6594786B1 (en) * 2000-01-31 2003-07-15 Hewlett-Packard Development Company, Lp Fault tolerant high availability meter

Also Published As

Publication number Publication date
TW517499B (en) 2003-01-11
GB2381428A (en) 2003-04-30
CN1449626A (zh) 2003-10-15
GB0301571D0 (en) 2003-02-26
AU2001268505A1 (en) 2002-01-14
WO2002003704A1 (en) 2002-01-10
GB2381428B (en) 2004-06-23
US7020709B1 (en) 2006-03-28

Similar Documents

Publication Publication Date Title
US6195680B1 (en) Client-based dynamic switching of streaming servers for fault-tolerance and load balancing
US6412004B1 (en) Metaserver for a multimedia distribution network
US6751673B2 (en) Streaming media subscription mechanism for a content delivery network
JP5542872B2 (ja) メディアコンテナファイルの管理
Haskin et al. The tiger shark file system
Li et al. Distributed multimedia systems
CN1223198C (zh) 用于容错流分离的系统和方法
US20030079016A1 (en) Using NAS appliance to build a non-conventional distributed video server
WO1997042582A1 (en) Multicasting method and apparatus
WO1997042582A9 (en) Multicasting method and apparatus
WO2001052483A1 (en) System and method for distribution of data packets utilizing an intelligent distribution network
CN1155122A (zh) 分布交互式多媒体业务系统
CN100346324C (zh) 一种对用户请求的解析方法
US8479242B1 (en) Video storage and distribution
WO2001022688A1 (en) Method and system for providing streaming media services
WO2002101559A1 (en) Stacked stream for providing content to multiple types of client devices
US7143179B2 (en) Method and system for parallel data transmission on demand to an unlimited number of clients without acknowledgment and on the basis of constant data availability
CN1777278A (zh) 支持异地存储方式的流媒体服务器的实现方法
Korkea-aho Scalability in Distributed Multimedia Systems
CN1613241A (zh) 用于提供可靠的基于万维网的电话功能的系统和方法
Ng et al. A multi-server video-on-demand system with arbitrary-rate playback support
WO2003063423A9 (en) Pseudorandom data storage
Calvagna et al. Design and implementation of a low-cost/high-performance Video on Demand server
CN205725832U (zh) 一种可视化内容分发装置
Boutaba et al. Distributed video production: Tasks, architecture and qos provisioning

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20051012

Termination date: 20180614

CF01 Termination of patent right due to non-payment of annual fee