FTP downloads really slow with 1gbit server / 250mbit client

chwba

Verified User
Joined
Dec 23, 2019
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40
My server has a 1 gbit connection and according to a speedtest it really reaches this speed. My personal connection is 250 Mbit, also for this one a speedtest shows, that it reaches the full 250Mbit. The server is not located too far away. When I download files, the max. I get is maybe 1 Mbit. What can I do to find out the cause and fix it?
 
1Mbit/s sounds very slow. FTP (the old unencrypted one) has very little overhead, so you should expect to see 250Mbps speeds I would think. While the transfer is ongoing, you can check both client and server if there's any IO wait on the systems, which would indicate that the disk IO can't keep up with the network speed. There might also be some network QoS throttling in place on server, client, or somewhere in between.
 
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