Hello,I am interested in optimizing TCP/IP throughput in LabVIEW. I am looking to send data between two systems at rates around 20-30mbps on a dedicated 100base-t ethernet connection. All data needs to reach the other side w/o loss. I have a few questions with regard to accomplishing this.1. Proper use of the Built-in TCP Vis: When sending data between two systems, what is the best manner? I have 50KB arrays of data that I need to move from one system to the next and have been wondering whether or not I need to packetize this, making multiple calls to the TCP/IP �write� function, or whether it's better to just make the call with the full 20-50KB buffer? Does LabVIEW handle this for the user? What is the most efficient way to do it? 2. Built-in Limits: I have seen references to LabVIEW's TCP buffer size being limited to 32KB, is this correct? Is it more efficient to make direct calls to windows DLLs?See this discussion thread:transfering data with TCP Additionally, I've seen another thread where it was mentioned that there was an �improved� set of TCP/IP VIs. http://www.sheldoninst.com/support.htmlAs mentioned in this discussion thread:200ms delay in windows tcp ip - how to work around? Has any one had any experience with these? Again, has anyone had any experience using LabVIEW to send data over the network at these rates?3. Protocols: Are there any protocols that will allow for transfer at these rates? OPC? Modbus TCP? I don't mind creating one, but I'd rather not reinvent the wheel.System information: Both systems will be running Windows XP SP1 on P4 processors with lots of RAM, so lots of processing power. The network will be going through either a crossover cable or a dedicated switch, with these computers being the only devices attached to it. One final question, would it make a difference if I went up to gigabit Ethernet? What throughput have people managed on gigabit connections?Thanks,Adam

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Optimizing network throughput over Ethernet with TCP/IP

Re: Optimizing network throughput over Ethernet with TCP/IP

graduate student 44

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‎06-19-2004 02:35 AM

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hi, i just read this since i have a similar problem, trying to transfer data across two computers at ~30mbyte/s rate. after doing some testings, i found the optimal package size turns out to be 4096 byte or 4K for tcp/ip tranmsission on LAN.

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