I have this weird issue with PutFTP and PutSFTP transfer rates. What I am seeing is that no matter what files I transfer from One server to another over a single connection the maximum rates I can send are 300Mbps for PutFTP and 1Gbps for PutSFTP.
The sending nifi is installed on Centos 7, running on a Dell R730, 190GB Ram, 16 Cores @ 2.4GHz and 4x10Gb nics bonded. The sending nifi has it's content repository on a ramdisk, and the receiving server is receiving to a ramdisk (for testing, to remove disk IO out of the equation). When I do a ftp send manually (without nifi) with mput I get ftp rates of ~8Gbs and sftp rates of 2.2Gbs (Which seems slow anyway). I would have expected transfer rates similar with nifi. Is there any way to work out why these rates are so much slower, but also so consistent? I'm using Nifi-1.30
