我目前正在开发一个应用程序与一个SOA架构,作为WCF服务(.Net 4.0)托管在Windows Server 2008 R2数据中心x64虚拟机上的IIS 7.5中的服务(它是在实际上是Amazon EC2上的m1.small实例)。这些服务在机器上以本地方式彼此对话,因此我将它们设置为使用netNamedPipeBinding以获得最佳性能。实例化模式是每个调用,并发设置为多个。WCF NetNamedPipeBinding延迟通道打开
我遇到两个问题,当我打开200毫秒到1秒之间的通道时,间歇性延迟,这是不可接受的,因为正常速度似乎是〜2ms。
我已经启用WCF跟踪和我看到的是,延迟表现为任一错误:
System.IO.PipeException:有一个错误写入管道:本 管正在关闭。 (232,0xe8)。
之后它出现WCF重试并成功连接(因此延迟)。第二个症状是在进行活动时半秒延时:
过程中的作用“http://tempuri.org/IConnectionRegister/ValidateUriRoute”
我能找到解决这个问题的唯一的事情就是有人认为它可能与TCP端口共享有关,但我使用的是命名管道。我尝试禁用TCP端口共享服务,但这没有什么区别。
出于兴趣我也试图改变所有端点使用的net.tcp相同的随机端口上侦听本地主机上,并且ValidateUriRoute活动中的半秒延时仍断断续续发生。
我WCF配置类似于此:
<system.serviceModel>
<serviceHostingEnvironment aspNetCompatibilityEnabled="true"
multipleSiteBindingsEnabled="false">
<serviceActivations>
<add relativeAddress="ConfigurationHost.svc" service="Core.ConfigurationHost" factory="Core.ConfigurationHostFactory" />
<add relativeAddress="RoutingHost.svc" service="Core.RoutingHost" factory="Core.RoutingHostFactory" />
<add relativeAddress="AuthenticationHost.svc" service="Core.AuthenticationHost" factory="Core.AuthenticationHostFactory" />
</serviceActivations>
</serviceHostingEnvironment>
<services>
<service name="Core.ConfigurationHost"
behaviorConfiguration="Unthrottled">
<endpoint address="net.pipe://localhost/ConfigurationHost.svc"
binding="netNamedPipeBinding"
bindingConfiguration="customNetNamedPipeBinding"
contract="Core.IConfiguration" />
</service>
<service name="Core.RoutingHost"
behaviorConfiguration="Unthrottled" >
<endpoint address="net.pipe://localhost/RoutingHost.svc"
binding="netNamedPipeBinding"
bindingConfiguration="customNetNamedPipeBinding"
contract="Core.IRouting" />
</service>
<service name="Core.AuthenticationHost"
behaviorConfiguration="Unthrottled">
<endpoint address="net.pipe://localhost/AuthenticationHost.svc"
binding="netNamedPipeBinding"
bindingConfiguration="CustomNetNamedPipeBinding"
contract="Core.IAuthentication" />
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior name="Unthrottled">
<serviceThrottling maxConcurrentCalls="100"
maxConcurrentSessions="100"
maxConcurrentInstances="100" />
</behavior>
</serviceBehaviors>
</behaviors>
<client>
<endpoint address="net.pipe://localhost/ConfigurationHost.svc"
binding="netNamedPipeBinding"
bindingConfiguration="customNetNamedPipeBinding"
contract="Core.IConfiguration"
name="Configuration" />
<endpoint address="net.pipe://localhost/RoutingHost.svc"
binding="netNamedPipeBinding"
bindingConfiguration="customNetNamedPipeBinding"
contract="Core.IRouting"
name="Routing" />
<endpoint address="net.pipe://localhost/AuthenticationHost.svc"
binding="netNamedPipeBinding"
bindingConfiguration="customNetNamedPipeBinding"
contract="Core.IAuthentication"
name="Authentication" />
</client>
<bindings>
<netNamedPipeBinding>
<binding name="customNetNamedPipeBinding"
maxReceivedMessageSize="2147483647"
sendTimeout="00:00:30"
receiveTimeout="infinite"
closeTimeout="00:00:30"
openTimeout="00:00:30"
maxConnections="500">
<security mode="None"/>
<readerQuotas maxDepth="200"
maxStringContentLength="2147483647"
maxArrayLength="2147483647"
maxBytesPerRead="2147483647"
maxNameTableCharCount="2147483647" />
</binding>
</netNamedPipeBinding>
</bindings>
</system.serviceModel>