CN102546590B - 基于动态服务响应时间向服务器分配流量的系统和方法 - Google Patents
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Abstract
本发明公开了基于动态服务响应时间向服务器分配流量的系统和方法。服务网关通过以下步骤处理从主机接收的服务请求:在服务网关与服务器之间的服务会话期间将服务请求从服务网关转送到服务器;判定服务会话的服务请求时间;由服务网关接收来自服务器的服务响应;由服务网关判定服务响应时间;由服务网关从服务请求时间和服务响应时间计算服务请求的服务处理时间;比较服务处理时间与预期服务处理时间;以及响应于该比较更新服务器的服务器示忙器。如果服务处理时间超过预期服务处理时间,那么更新服务器示忙器以指示服务器为忙。否则,更新服务器示忙器以指示服务器为不忙。
Description
技术领域
本发明总的来说涉及数据通信,更具体地,涉及基于服务处理参数将应用程序流量分配给服务器的方法和系统。
背景技术
web服务和云计算正以前所未有的速度部署。每天在数据中心卸载和安装新服务器。web服务和企业计算的需要来自四面八方。面向消费者的服务包括:智能手机应用程序、诸如基于位置的服务移动电话应用程序、逐向导航服务、诸如KindleTM的电子书服务、诸如YouTubeTM或者HuluTM的视频应用程序、诸如PandoraTM或者iTunesTM的音乐应用程序、诸如NetflixTM的互联网电视服务以及许多其他快速增长的消费者web服务。在企业方面,面向消费者的服务包括:诸如GoogleTM文档、MicrosoftTM Office Live和SharepointTM软件的基于云计算的服务、Salesforce.comTM的在线软件服务、远程出席和web会议服务以及许多其他企业云计算服务。
因此,部署越来越多的服务器以适应日益增长的计算需求。传统上,这些服务器由诸如应用交换控制器或者服务器负载均衡器(ADC/SLB)的服务网关管理,该服务网关通常为在固定模块中或者在机箱中的网络设备,或者运行在同质化服务器ADC/SLB中基于进入服务请求管理服务器的应用程序流量的软件模块。在服务器之间分配流量的常用方法是基于应用程序(HTTP、FTP、HTTPS等)、诸如URL的服务地址、基于网络接口或者主机IP地址的优先级分配服务请求。在假设服务器完全用来处理服务请求的情况下,ADC/SLB可将服务请求分配给服务器。通常,满载服务器不会很好地处理服务请求。事实上,当服务器为忙时,大部分服务请求遭受到延迟或者没有服务可用。通常较佳做法是不将服务请求进一步分配给忙服务器。当前ADC/SLB允许网络管理员设定最大服务会话容量,使得ADC/SLB不发送超过最大容量的服务请求给该服务器。然而,对服务器的静态配置限制不能充分利用服务器的容量,并且并不是所有服务请求都从服务器要求相同处理。有利的是,ADC/SLB基于来自服务器的服务响应时间判定服务器是否为忙,使得ADC/SLB可减少发送更多服务请求给服务器。
因此,需要一种基于动态服务响应时间保护服务器过载的ADC/SLB的系统和方法。
发明内容
根据本发明的一个实施方式,一种处理从主机接收的服务请求的方法,包括:(a)在服务网关与服务器之间的服务会话期间将服务请求从服务网关转送到服务器;(b)由服务网关判定服务会话的服务请求时间;(c)由服务网关接收来自服务器的服务响应;(d)由服务网关判定服务响应时间;(e)由服务网关从服务请求时间和服务响应时间计算服务请求的服务处理时间;(f)比较服务处理时间与预期服务处理时间;以及(g)响应于该比较,更新服务器的服务器示忙器。
在本发明的一个方面,该更新(g)包括:(g1)响应于判定服务处理时间超过预期服务处理时间,由服务网关更新服务器示忙器以指示服务器为忙;以及(g2)响应于判定服务处理时间不超过预期服务处理时间,由服务网关更新服务器示忙器以指示服务器为不忙。
在本发明的一个方面,该计算(e)包括:(e1)由服务网关计算服务请求的服务处理时间,作为服务请求时间与服务响应时间之间的持续时间。
在本发明的一个方面,服务响应包括错误指示,其中,如果该错误指示指示错误,那么服务网关不计算服务处理时间。
在本发明的一个方面,该比较(f)包括:(f1)由服务网关根据服务请求或者服务器的服务属性配置预期服务处理时间。
在本发明的一个方面,预期服务处理时间与服务属性相关联并且存储在数据存储器中,其中,该配置(f1)包括:(f1i)由服务网关比较服务请求或者服务器与数据存储器中的服务属性;以及(f1ii)如果服务请求或者服务器匹配数据存储器中的服务属性,那么检索与匹配服务属性相关联的预期服务处理时间。
在本发明的一个方面,该比较(f)还包括:(f2)基于安全网关与服务器之间的先前服务会话的服务处理时间计算调整预期服务处理时间。
在本发明的一个方面,该转送(a)包括:(a1)由服务网关从主机接收服务请求;(a2)由服务网关检查服务器的服务器示忙器;(a3)响应于判定服务器示忙器指示服务器为忙,由服务网关将服务请求放置在服务请求缓冲器中;以及(a4)响应于判定服务器示忙器指示服务器为不忙,在服务网关与服务器之间的服务会话期间将服务请求从服务网关转送到服务器。
在本发明的一个方面,该转送(a4)包括:(a4i)由服务网关检查服务请求缓冲器是否为空;(a4ii)响应于判定服务请求缓冲器为空,在服务网关与服务器之间的服务会话期间将服务请求从服务网关转送到服务器;以及(a4iii)响应于判定服务请求缓冲器不为空,由服务网关将服务请求放置在服务请求缓冲器中。
在本发明的一个方面,该放置(a3)包括:(a3i)由服务网关判定在该服务网关处的计时器是否已经过期;以及(a3ii)响应于判定该计时器已经过期,在服务网关与服务器之间的服务会话期间将服务请求从服务网关转送到服务器。
在本发明的一个方面,服务请求与优先级相关联,其中,服务请求缓冲器被配置为存储与优先级相关联的服务请求,其中,该放置(a3)包括:(a3i)由服务网关将服务请求放置在服务请求缓冲器中;以及(a3ii)根据相关联优先级将服务请求缓冲器中的服务请求从服务网关转送到服务器。
本文中还描述和要求对应于上述方法的系统和计算机程序产品。
附图说明
图1示出服务网关与服务器之间的服务会话;
图2示出由服务网关处理服务请求的方法的实施方式;
图3示出判定服务器是否为忙的方法的实施方式;
图4示出基于服务器示忙器处理服务请求的方法的实施方式;
图5示出在服务网关更新服务器示忙器之后处理服务请求的方法的实施方式;
图6示出基于服务优先级处理服务请求的方法的实施方式;
图7为示出由服务网关处理服务请求的方法的实施方式的流程图;
图8为示出基于服务器示忙器处理服务请求的方法的实施方式的流程图。
具体实施方式
本发明可采用完全硬件实施方式、完全软件实施方式或者含有硬件和软件元件两者的实施方式的形式。在优选实施方式中,本发明以软件实施,其包括但不限于固件、常驻软件等。
此外,本发明可采用从提供由计算机或者任何指令执行系统使用或者连同计算机或者任何指令执行系统使用的程序码的计算机可使用或者计算机可读介质可存取的计算机程序产品的形式。为了描述目的,计算机可使用或者计算机可读介质可为可含有、存储、传送、传播或者传输由指令执行系统、装置或者器件使用或者连同指令执行系统、装置或者器件使用的eh程序的任何装置。
该介质可为电子、磁性、光学、电磁、红外或者半导体系统(或者装置或器件)或者传播介质。计算机可读介质的实例包括:半导体或者固态存储器、磁带、可移除计算机软盘、随机存取存储器(RAM)、只读存储器(ROM)、硬磁盘和光盘。光盘的当前实例包括只读存储器光盘(CD-ROM)、读/写光盘(CD-R/W)和DVD。
一种适合存储及/或执行程序码的数据处理系统将包括:至少一个处理器,通过系统总线直接或者间接地耦合至存储器元件。该存储器元件可包括:在程序码的实际执行期间所利用的本地存储器、大容量存储器以及缓冲存储器,该缓冲存储器提供暂时存储至少一些程序码以减少在执行期间必须从大容量存储器检索代码的次数。
输入/输出或者I/O器件(包括但不限于键盘、显示器、指针装置等)可直接或者通过中间的I/O控制器耦合至该系统。
网络适配器也可通过中间的专用或者公共网络耦合至该系统以使数据处理系统能够变为耦合至其他数据处理系统或者远端打印机或者存储器件。调制解调器、电缆调制解调器和以太网卡只是当前可用类型的网络适配器的一些。
图中的流程图和方块图示出根据本发明的各种实施方式的系统、方法和计算机程序产品可能实施的结构、功能和操作。在这方面,流程图或者方块图中的各个方块可代表代码模块、代码段或者代码部分,其包括一个或者一个以上可执行指令以实施指定的本地功能。还应注意,在一些替代性实施中,方块中所指出的功能可不按图中所指出的次序出现。例如,取决于涉及的功能,连续示出的两个方块实际上可几乎同时执行,或者该方块有时可以相反次序执行。还将注意,方块图及/或流程图插图的各个方块,以及方块图及/或流程图插图中的方块的组合可通过执行指定功能或者动作的基于专用硬件的系统或者专用硬件和计算机指令的组合来实施。
本文中所使用的术语仅是为了描述特定实施方式的目的,并且并不意为限制本发明。如本文中所使用,除非上下文明确指示,否则单数形式“一(a)”、“一(an)”和“该(the)”意为也包括复数形式。应进一步了解,术语“包括(comprises)”及/或“包括(comprising)”当用在本说明书中时,指定存在所叙述特征、整体、步骤、操作、元件及/或组件,但不排除存在或者添加一个或者一个以上其他特征、整体、步骤、操作、元件及/或组件及/或它们的群组。
图1示出服务网关110与服务器200之间的服务会话321。该服务网关110从主机100接收服务请求301。该服务请求301通过数据网络153交换。在一个实施方式中,服务请求301为诸如HTTP(超文本传输协议)请求的web服务请求、安全HTTP请求、FTP(文件传输协议)请求、文件传输请求、SIP(会话初始化协议)会话请求、基于web技术的请求、视频或者音频串流请求、web会议会话请求、或者通过互联网或者企业网络的任何请求。
主机100为具有网络存取能力的计算器件。该主机100在操作上耦合至处理器103和计算机可读介质104。该计算机可读介质104存储计算机可读程序码以实施如本文所述本发明的各种实施方式。在一个实施方式中,主机100为工作站、桌上型个人计算机或者膝上型个人计算机。在一个实施方式中,主机100为个人数据助理(PDA)、智能手机或者移动电话。在一个实施方式中,主机100为机顶盒、互联网媒体查看器、互联网媒体播放器、智能传感器、智能医疗器件、机顶盒、网络电视机、网络DVR、网络蓝光播放器或者媒体中心。
在一个实施方式中,数据网络153为互联网协议(IP)网络。在一个实施方式中,数据网络153为企业数据网络或者区域企业数据网络。在一个实施方式中,数据网络153为互联网服务提供商网络。在一个实施方式中,数据网络153为常驻数据网络。在一个实施方式中,数据网络153包括诸如以太网的有线网络。在一个实施方式中,数据网络153包括诸如WiFi网络或者蜂窝式网络的无线网络,。
服务网关110操作上耦合至处理器113和计算机可读介质114。该计算机可读介质114存储计算机可读程序码,该计算机可读程序码当由处理器113执行时,实施如本文所述本发明的各种实施方式。在一些实施方式中,服务网关110实施为服务器负载均衡器、应用交换控制器、服务交换平台、流量管理器、安全网关、防火墙系统的组件、虚拟专用网络(VPN)的组件、用于视频服务器的负载均衡器、或者用于将负载分配给多个服务器的网关。
服务器200操作上耦合至处理器213和计算机可读介质214。该计算机可读介质214存储计算机可读程序码,该计算机可读程序码当由处理器213执行时,实施如本文所述本发明的各种实施方式。在一些实施方式中,该计算机可读程序码将服务器200实施为web服务器、文件服务器、视频服务器、数据库服务器、应用程序服务器、语音系统、会议服务器、媒体网关、SIP服务器、远端存取服务器、VPN服务器或者媒体中心。
服务网关110经由数据网络155连接至服务器200。在一个实施方式中,数据网络155与数据网络153相同。在一个实施方式中,数据网络155与数据网络153不同。在一个实施方式中,主机100不直接存取数据网络155。在一个实施方式中,主机100直接存取数据网络155。
图2和图7示出由服务网关110处理服务请求301的方法的实施方式。在一个实施方式中,服务网关110从主机100接收服务请求301,并且通过建立服务网关110与服务器200之间的服务会话321来将服务请求301转送到服务器200(701)。服务网关110判定服务会话321的服务请求时间361(702)。在一个实施方式中,服务请求时间361为诸如一天时间、系统时间、时间计数器的时间戳。在一个实施方式中,服务请求时间361为服务网关110将服务请求301发送至服务器200的时间。在一个实施方式中,服务请求时间361为服务网关110从服务器200接收“接收服务请求301”确认的时间。
在服务器200处理服务请求301之后,服务器200利用服务响应352来响应。在一个实施方式中,服务响应352包括web页、文档、文件、图片、音频或者视频串流信号或者语音电话。在一个实施方式中,服务响应352包括错误指示354。错误指示354可包括HTTP错误状态码、FTP错误码、SIP错误信息或者任何其他错误码。
服务网关110接收服务响应352,并且将服务响应352转送到主机100(703)。服务网关110在接收服务响应352之后立即判定服务响应时间362(704)。在一个实施方式中,服务响应时间362为诸如一天时间、系统时间、时间计数器的时间戳,并且与服务请求时间361兼容。在一个实施方式中,服务响应时间362为服务网关110接收服务响应352的时间。在一个实施方式中,服务响应时间362为服务网关110接收服务响应352的第一条信息的时间。在一个实施方式中,服务响应时间362为服务网关110接收服务响应352的最后一条信息的时间。在一个实施方式中,服务响应时间362为服务网关110与服务器200断开服务会话321的时间。在一个实施方式中,服务响应时间362包括在服务响应352中。
在判定服务请求时间361和服务响应时间362之后,服务网关110从服务请求时间和服务响应时间计算服务请求301的服务处理时间360(705)。服务处理时间360通常测量服务请求时间361与服务响应时间362之间的持续时间。在一实例中,服务网关110从服务响应时间362减去服务请求时间361以获得服务处理时间360。在另一实例中,服务网关110计算服务请求时间361与服务响应时间362之间的持续时间以判定服务处理时间。例如,服务处理时间360为10毫秒、5毫秒、247毫秒、3秒、15秒、1分钟、75微秒或者289个单位时间。
在一个实施方式中,服务网关110在计算服务处理时间360之前验证服务响应352。在一实例中,如果服务响应352含有错误指示354,那么服务网关110验证服务响应352。在一个实施方式中,如果存在错误指示354中所指示的错误,那么服务网关110不计算服务请求301的服务处理时间360。
在一个实施方式中,服务网关110包括完成服务会话计数器326,其将服务网关110与服务器200之间的完成服务会话数目计数。在一个实施方式中,在服务网关110接收服务响应352之后或者在服务网关110与服务器200断开服务会话321之后,服务网关110将完成服务会话计数器326递增1。在一个实施方式中,服务网关110在判定服务处理时间360之后将完成服务会话计数器326递增1。
图3示出判定服务器200是否为忙的方法的实施方式。服务网关110包括服务器200的服务器示忙器378,指示服务器200是否为忙。在一个实施方式中,服务器示忙器378的值0或者“不忙”指示服务器200不忙,而值1或者“忙”指示服务器200忙。服务网关110基于服务处理时间360更新服务器示忙器378。
在一个实施方式中,服务网关110包括预期服务处理时间374。参见图3和图7两者,服务网关110比较服务处理时间360与预期服务处理时间374(706)。响应于判定该服务处理时间超过预期服务处理时间374,服务网关110将服务器示忙器378更新为“忙”(708)。
在一个实施方式中,服务处理时间360需要至少比预期服务处理时间374大50%,以超过预期服务处理时间374。在一个实施方式中,服务处理时间360需要至少比预期服务处理时间374大300%。在一个实施方式中,服务处理时间360需要比预期服务处理时间374更大。
在一个实施方式中,服务网关110判定服务处理时间360不超过预期服务处理时间374(707),以及作为回应,服务网关110将服务器示忙器378更新为“不忙”(709)。
在一个实施方式中,预期服务处理时间374是基于服务请求301。在一个实施方式中,服务请求301包括服务请求统一资源定位器(URL)。在一个实施方式中,根据服务属性379配置预期服务处理时间374。该服务属性379为影响预期服务处理时间374的属性。例如,不同协议将以不同速率处理服务请求,以及因此将具有不同预期服务处理时间。在一个实施方式中,服务属性379是基于服务请求URL。在一个实施方式中,服务属性379是基于服务请求URL的一部分,诸如域名、web站点中的web文件夹名、文档类型、服务请求URL中所指示的协议。例如,服务请求URL为“http://www.abc.com/shops/shoe.html”。服务属性379是基于域名“www.abc.com”、web文件夹“www.abc.com/shops”、文档类型.html(或者其他文档类型,诸如.php、.asp等)、协议http(或者其他协议,诸如ftp、https、sip等)。在一个实施方式中,服务属性379与服务器200上所实施的程序码有关。例如,服务器200为使用Apache web服务器软件、Microsoft web服务器软件、Oracle web服务器软件或者其他web服务器软件的web服务器。服务属性379与web服务器软件有关。
在一个实施方式中,服务属性379是基于域名“www.a10networks.com”,以及预期服务处理时间374为10毫秒。在一个实施方式中,服务属性379是基于HTTP协议,以及预期服务处理时间374为75毫秒。在一个实施方式中,服务属性379是基于FTP文件下载协议,以及预期服务处理时间374为2分钟。在一个实施方式中,服务属性379是基于HTML文档类型,以及预期服务处理时间374为20毫秒。
在一个实施方式中,服务属性379与服务器200上所实施的程序码有关。在一个实施方式中,服务器200使用Apache web服务器软件,以及预期处理时间为50毫秒。服务器200使用Microsoft web服务器软件,以及预期处理时间为90毫秒。
在一个实施方式中,服务属性379与以上描述所提到的多个属性有关。预期处理时间可通过将该多个属性的多个预期处理时间求和来判定。
在一个实施方式中,服务网关110包括数据存储器380,其存储预期服务处理时间374和相关联服务属性379。在一个实施方式中,服务网关110比较服务请求301或者服务器200与数据存储器380中的服务属性379。如果存在匹配,那么服务网关110检索与匹配服务属性379相关联的预期服务处理时间374,并且比较检索的预期服务处理时间374与该服务处理时间360。在一个实施方式中,预期服务处理时间374与任何服务属性无关。服务网关110检索预期服务处理时间374,并且将其与服务处理时间360比较。
在一个实施方式中,由使用者配置预期服务处理时间374。
在一个实施方式中,基于先前服务会话的服务处理时间自动判定预期服务处理时间374。在判定服务处理时间360之后,服务网关110立即通过以下公式计算调整预期服务处理时间376:
在所述实施方式中,服务网关110在改变完成服务会话计数器325之前,计算调整预期服务处理时间376。在一个实施方式中,如果服务处理时间360超过预期服务处理时间374,或者如果服务响应352包括错误指示354,那么服务网关110不调整预期服务处理时间374。在该实施方式中,服务网关110不改变完成服务会话计数器326。
在一个实施方式中,预期服务处理时间374与服务属性379相关联。完成服务会话计数器326也与服务属性379相关联以对各个服务属性实施分开计数。服务网关110在计算调整预期服务处理时间376之前检查服务请求301或者服务器200是否匹配服务属性379。
在一个实施方式中,服务网关110利用调整预期服务处理时间376替代预期服务处理时间374。所述调整预期服务处理时间376变为服务网关110与服务器200之间的下个服务会话的预期服务处理时间374。
在服务网关110更新服务器忙指示之后,服务网关110从主机(71)接收下个服务请求,并且所述方法重复。
图4和图8示出基于服务器示忙器378处理服务请求301的方法的实施方式。在一个实施方式中,服务网关110包括服务请求缓冲器331。在一个实施方式中,服务网关110从主机110接收服务请求301(801)。在一个实施方式中,服务网关110将服务请求301放入服务请求缓冲器331中。在另一个实施方式中,服务网关110检查服务器示忙器378(802)。当服务器示忙器378指示服务器200为“忙”时(803),服务网关110将服务请求301放置到服务请求缓冲器331中(804)。在一个实施方式中,当服务器示忙器378指示服务器200为“不忙”时(803),服务网关110将服务请求301转送到服务器200(701),如上文图2和图7所述。在另一个实施方式中,当服务器示忙器378指示服务器200为“不忙”时,服务网关110检查服务请求缓冲器331是否为空(805)。如果服务请求缓冲器331为空,那么服务网关110将服务请求301转送到服务器200(701)。如果服务请求缓冲器331不为空,那么服务网关110将服务请求301放置到服务请求缓冲器331中(806)。该服务网关110然后将服务请求缓冲器331中的各个服务请求转送到服务器200(701),直到服务请求缓冲器331为空,或者直到服务器示忙器378被改为“忙”。
图5示出在服务网关110更新服务器示忙器378之后处理服务请求的方法的实施方式。服务网关110根据服务器示忙器378的不同值处理服务请求缓冲器331中的服务请求301。在一个实施方式中,服务器示忙器378具有更新值“不忙”。服务网关110检验服务请求缓冲器331,并且找到服务请求301。服务网关110将服务请求301转送到服务器200(701)。
在一个实施方式中,服务器示忙器378具有更新值“忙”。在一个实施方式中,服务网关110不立即处理服务请求缓冲器331。服务网关110包括计时器119。当计时器119过期时,服务网关110找到服务请求缓冲器331中的服务请求301,并且将服务请求缓冲器331中的服务请求301转送到服务器200(701)。计时器119可被配置为例如1分钟、30秒、1秒、400毫秒、5毫秒、300微秒的持续时间或者任何其他持续时间,使得服务不会受到服务请求301严重影响。在一个实施方式中,持续时间是基于服务请求301的属性。
图6示出基于服务优先级处理服务请求的方法的实施方式。在一个实施方式中,服务请求303与服务优先级403相关联。在一种情况下,服务优先级403是基于服务请求303URL。在一种情况下,服务优先级403是基于主机100,诸如主机100IP地址、主机100使用者身份。在一种情况下,服务优先级403与网络接口相关联,服务网关110从该网络接口接收服务请求303。服务网关110判定服务请求303的服务优先级403。
服务请求缓冲器331被配置为存储具有服务优先级401的服务请求。
在服务器示忙器378具有更新值“忙”的实施方式中,服务网关110比较服务优先级403与服务优先级401。响应于找到匹配,服务网关110将服务请求303放置到服务请求缓冲器331中。
在一个实施方式中,服务网关110包括第二服务请求缓冲器332。服务请求缓冲器332被配置为存储具有服务优先级402的服务请求,服务优先级402高于服务优先级401。
在服务器示忙器378具有更新值“不忙”的实施方式中,服务网关110处理服务请求缓冲器332中的服务请求,先于处理服务请求缓冲器331中的服务请求。在一个实施方式中,服务网关110在将服务请求缓冲器331中的服务请求301发送给服务器220之前将服务请求缓冲器332中的服务请求302发送给服务器200。
在一个实施方式中,服务网关110在处理服务请求缓冲器331之前处理来自服务请求缓冲器332的所有服务请求。在一个实施方式中,服务网关110包括服务比率117,其中,服务网关110根据比率117处理服务请求缓冲器332和服务请求缓冲器331,其中,服务比率117相较于较低优先级服务请求缓冲器331更偏爱高优先级服务请求缓冲器332,以避免缺少服务请求缓冲器331中的较低优先级服务请求。
虽然根据所示实施方式已经描述本发明,但是本领域的普通技术人员应理解,可对这些实施方式进行更改,并且更改在本发明的精神和范围内。因此,在不背离所附权利要求的精神和范围的情况下,本领域的普通技术人员可进行各种更改。
Claims (13)
1.一种处理由服务网关从主机接收的服务请求的方法,包括:
由所述服务网关从所述主机接收服务会话的第一服务请求;
由所述服务网关判定所述服务会话的服务请求时间;
在所述服务网关与服务器之间的所述服务会话期间将所述第一服务请求从所述服务网关转送到所述服务器;
由所述服务网关接收来自所述服务器的服务响应;
由所述服务网关判定服务响应时间;
由所述服务网关从所述服务请求时间和所述服务响应时间计算所述第一服务请求的服务处理时间;
比较所述服务处理时间与预期服务处理时间,其中,由所述服务网关根据所述第一服务请求或者所述服务器的服务属性来判定所述预期服务处理时间;
响应于所述比较,更新所述服务器的服务器示忙器,其中,所述服务器的服务器示忙器在所述服务网关处保持;
由所述服务网关从所述主机接收第二服务请求;
由所述服务网关检查所述服务器的服务器示忙器;
响应于判定所述服务器示忙器指示所述服务器为忙,将所述第二服务请求放置在所述服务网关的服务请求缓冲器中并且保持与所述主机的连接;以及
响应于判定所述服务器示忙器指示服务器为不忙,在所述服务网关与所述服务器之间的服务会话期间将所述第二服务请求从所述服务网关转送到所述服务器。
2.根据权利要求1所述的方法,其中,响应于所述比较,更新所述服务器的服务器示忙器包括:
响应于判定所述服务处理时间超过所述预期服务处理时间,由所述服务网关更新所述服务器示忙器以指示所述服务器为忙;以及
响应于判定所述服务处理时间不超过所述预期服务处理时间,由所述服务网关更新所述服务器示忙器以指示所述服务器为不忙。
3.根据权利要求1所述的方法,其中,从所述服务请求时间和所述服务响应时间计算所述第一服务请求的服务处理时间包括:
由所述服务网关计算所述第一服务请求的所述服务处理时间作为所述服务请求时间与所述服务响应时间之间的持续时间。
4.根据权利要求1所述的方法,其中,所述服务响应包括错误指示,
其中,如果所述错误指示指示错误,那么所述服务网关不计算所述服务处理时间。
5.根据权利要求1所述的方法,其中,所述预期服务处理时间与所述服务属性相关联并且存储在数据存储器中,其中,由所述服务网关根据所述第一服务请求或者所述服务器的服务属性来判定所述预期服务处理时间包括:
由所述服务网关将所述第一服务请求或者所述服务器与所述数据存储器中的所述服务属性进行比较;以及
如果所述第一服务请求或者所述服务器匹配所述数据存储器中的所述服务属性,则检索与匹配的所述服务属性相关联的预期服务处理时间。
6.根据权利要求1所述的方法,其中,比较所述服务处理时间与预期服务处理时间还包括:
基于安全网关与所述服务器之间的先前服务会话的服务处理时间来计算调整预期服务处理时间。
7.根据权利要求1所述的方法,其中,响应于判定所述服务器示忙器指示服务器为不忙,在所述服务网关与所述服务器之间的服务会话期间将所述第二服务请求从所述服务网关转送到所述服务器包括:
由所述服务网关检查所述服务请求缓冲器是否为空;
响应于判定所述服务请求缓冲器为空,在所述服务网关与所述服务器之间的服务会话期间将所述第二服务请求从所述服务网关转送到服务器;以及
响应于判定所述服务请求缓冲器不为空,由所述服务网关将所述第二服务请求放置在所述服务请求缓冲器中。
8.根据权利要求1所述的方法,其中,响应于判定所述服务器示忙器指示所述服务器为忙,由所述服务网关将所述第二服务请求放置在服务请求缓冲器中包括:
由所述服务网关判定在所述服务网关处的计时器是否已经过期;以及
响应于判定所述计时器已经过期,在所述服务网关与所述服务器之间的服务会话期间将所述第二服务请求从所述服务网关转送到所述服务器。
9.根据权利要求1所述的方法,其中,所述第二服务请求与优先级相关联,其中,所述服务请求缓冲器被配置为存储与所述优先级相关联的服务请求,其中,响应于判定所述服务器示忙器指示所述服务器为忙,由所述服务网关将所述第二服务请求放置在服务请求缓冲器中还包括:
根据相关联的所述优先级将所述服务请求缓冲器中的第二服务请求从所述服务网关转送到所述服务器。
10.一种处理从主机接收的服务请求的系统,包括:
服务器,用于处理服务请求;和
服务网关,包括处理器和嵌入有计算机可读程序码的计算机可读存储介质,其中,当所述计算机可读程序码由所述处理器执行时,使得所述服务网关:
从所述主机接收第一服务请求;
判定服务会话的服务请求时间;
在所述服务网关与所述服务器之间的所述服务会话期间将所述第一服务请求转送到所述服务器;
接收来自所述服务器的服务响应;
判定服务响应时间;
从所述服务请求时间和所述服务响应时间计算所述第一服务请求的服务处理时间;
比较所述服务处理时间与预期服务处理时间,其中,由所述服务网关根据所述第一服务请求或者所述服务器的服务属性来判定所述预期服务处理时间;
响应于所述比较,更新所述服务器的服务器示忙器,其中所述服务器的服务器示忙器在所述服务网关处保持;
从所述主机接收第二服务请求;
检查所述服务器的服务器示忙器;
响应于判定所述服务器示忙器指示所述服务器为忙,将所述第二服务请求放置在所述服务网关的服务请求缓冲器中并保持与所述主机的连接;以及
响应于判定所述服务器示忙器指示所述服务器为不忙,
在所述服务网关与所述服务器之间的所述服务会话期间将所述第二服务请求从所述服务网关转送到所述服务器。
11.根据权利要求10所述的系统,其中,响应于所述比较,更新所述服务器的服务器示忙器包括:
响应于判定所述服务处理时间超过所述预期服务处理时间,更新所述服务器示忙器以指示所述服务器为忙;以及
响应于判定所述服务处理时间不超过所述预期服务处理时间,更新所述服务器示忙器以指示所述服务器为不忙。
12.根据权利要求10所述的系统,其中,所述预期服务处理时间与服务属性相关联并且存储在数据存储器中,其中,根据所述第一服务请求或者所述服务器的服务属性来判定所述预期服务处理时间包括:
将所述第一服务请求或者所述服务器与所述数据存储器中的服务属性进行比较;以及
如果所述第一服务请求或者所述服务器匹配所述数据存储器中的服务属性,则检索与匹配的所述服务属性相关联的预期服务处理时间。
13.根据权利要求10所述的系统,其中,所述比较服务处理时间与预期服务处理时间包括:
基于安全网关与服务器之间的先前服务会话的服务处理时间来计算调整预期服务处理时间。
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