On 05/06/2018 06:20 AM, Chris Olson wrote: > > Thanks for the follow up message regarding measurement > of network performance. we are checking into nc and > how it might be used. The man page for "nc" has specific examples of sending a file over TCP. > We have not found iperf on any > of our systems, but we may try installing it with yum. > > You may be right about the ftp server trying to use > ftruncate() on the destination file /dev/null, but > I do not see a reason that it would do that. What > needs to be truncated at the beginning of a transfer? Explaining *why* the authors of the FTP server wrote it as they did is beyond what I can offer. I can explain the mechanism, but not the rationale.