Object Request Broker（对象请求代理）：Ice, WCF and Java RMI

文本内容是节选自
Choosing Middleware: Why Performance and Scalability do (and do not) Matter
by Michi Henning, Chief Scientist, ZeroC, Inc.
文章的作者也是<基于C++ CORBA高级编程(Advanced CORBA(R) Programming with C++)>的作者

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测试环境
Dual-core 2.2GHz Athlon with 2GB of memory running Windows XP Professional SP3.
Dual-core 2.0GHz Mac Mini with 2GB of memory running Windows Vista Ultimate SP1.

 

编译器
C++ Visual Studio 2008
C# Visual Studio 2008，.NET version 3.5
Java 1.6.0 JDK

编译使用速度优化，对于vista 生成64位代码。ICE 版本 3.30

Latency
延迟是评估中间件的一个重要的因素， 他被定义为由客户端调用服务器，然后接受到结果的时间。最小延迟被定义为函数o（没有输入参数，没有返回值）的调用返回时间。

source code

ICE
interface Latency{
 void o(); // Shortest possible operation name
};

WCF
[System.ServiceModel.ServiceContract]
interface Latency {
 [System.ServiceModel.OperationContract] void o();
}

RMI
import java.rmi.Remote;
import java.rmi.RemoteException;
public interface Latency extends Remote {
 void o() throws RemoteException;
}

 

测试结果

Requests/second	Ice for .NET	Ice for Java	Ice for C++	WCF binary	WCF SOAP	RMI
Loopback	6,900	8,000	10,500	~6,900	~2,300	10,600
Gigabit network	2,300	2,300	2,300	~2,190	~560	2,220

 

Throughput
评估中间件的另一个重要因素是throughput,他是指中间件每秒能传输多少数据。

source code

ICE
sequence<byte> ByteSeq;
interface Throughput {
 void sendByteSeq(ByteSeq b);
 ByteSeq recvByteSeq();
};

 

WCF
[ServiceContract]
interface Test {
 [OperationContract]
 void sendByteSeq(byte[] seq);

 [OperationContract]
 byte[] recvByteSeq();
}

RMI
import java.rmi.Remote;
import java.rmi.RemoteException;
public interface Throughput extends Remote {
 int ByteSeqSize = 500000;
 
 void sendByteSeq(byte[] seq) throws RemoteException;
 byte[] recvByteSeq() throws RemoteException;
}

 

测试结果 

Throughput  loopback	Ice for .NET	Ice for Java	Ice for C++	WCF binary	WCF SOAP	RMI
Byte seq (send)	630Mbit/s	800Mbit/s	1,200Mbit/s	515Mbit/s	144Mbit/s	825Mbit/s
Byte seq (recv)	610Mbit/s	720Mbit/s	960Mbit/s	550Mbit/s	165Mbit/s	800Mbit/s

 

Throughput  Gigabit network	Ice for .NET	Ice for Java	Ice for C++	WCF binary	WCF SOAP	RMI
Byte seq (send)	520Mbit/s	660Mbit/s	740Mbit/s	425Mbit/s	140Mbit/s	283Mbit/s
Byte seq (recv)	410Mbit/s	590Mbit/s	655Mbit/s	370Mbit/s	130Mbit/s	280Mbit/s