There is a server on DEBIAN openvpn, the speed is cut when downloading files from samba?

Question

openvpn

Hello!
The problem is the following, there is a server on DEBIAN, it has OPENVPN, all other computers in different places are connected to it. The speed of OPENVPN, when checked by the IPERF3 utility, shows 500.
When downloading files with the same channel from the server on which OPENVPN is located, the speed reaches 100, not 500. But if downloading from a client machine, then the speed leaves much to be desired 20-30. The client's machine is also set to DEBIAN and identical in settings. What could be the problem?
server.conf

port 1194
proto tcp
dev tun
ca ca.crt
cert server.crt
key server.key
dh dh.pem
auth SHA512
tls-crypt tc.key
topology subnet
server 10.8.0.0 255.255.255.0
tun-mtu 60000
fragment 0
mssfix 0
ifconfig-pool-persist /etc/openvpn/server/ipp.txt
keepalive 10 120
cipher AES-256-CBC
user nobody
group nogroup
persist-key
persist-tun
status openvpn-status.log
verb 3
crl-verify crl.pem
client-to-client

client.conf

client
dev tun
proto tcp
remote  1194
tun-mtu 60000
fragment 0
mssfix 0
resolv-retry infinite
nobind
persist-key
persist-tun
remote-cert-tls server
auth SHA512
cipher AES-256-CBC
verb 3

Answer 1

Everything is natural. And openvpn often cuts speed, and samba. You will not reach the bandwidth of the channel with them. Well, iperf does not write anything to the disk and does not read from it, unlike a real file transfer.