> There were dozens of examples of such ftp tests with varying > block sizes, bidirectional transfers, destination files on > RAID storage, and a mix of some system loading programs run > independently and during the network performance testing. > Also archived were a full complement of network tests with > what looks like the original ttcp and possibly newer versions. ttcp morphed into iperf. > > These utilities looked like they would work on our CentOS 6 > systems, but we did not find ttcp and the ftp tests failed. > the piping from dd failed with a message indicating that: > |dd was not a recognized file. Try ftp> put |"dd if=/dev/zero bs=32768 count=8000" /dev/null > We no longer have available CentOS systems with versions of > the OS before CentOS 6. Could there have been a change to > ftp that will not allow a source file specified in this way > or would this transfer method have never worked on Linux? > It works, just the semantics are a bit different. P.