Slow transfer rates with FTP and Fish on Intrepid and Hardy

[Hakan Koseoglu]

Hi Nigel,

On Mon, Feb 15, 2010 at 4:56 PM, Nigel Henry
<cave.dnb2m97pp at aliceadsl.fr> wrote:
> I'm getting very slow transfer rates 10 - 50KB/s when transfering data using
> Gftp on my local network. This is specifically with Kubuntu and Ubuntu
> Intrepid, and Kubuntu Hardy.

Test the actual network performance using a tool like iperf. Sample run below:

[root at hobbit ~]# iperf -c 10.15.1.60
------------------------------------------------------------
Client connecting to 10.15.1.60, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[  3] local 10.15.10.17 port 35937 connected with 10.15.1.60 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.0 sec  1.07 GBytes    919 Mbits/sec

Also check for network errors and your configuration:
[root at hobbit ~]# ethtool eth0
Settings for eth0:
        Supported ports: [ TP ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Supports auto-negotiation: Yes
        Advertised link modes:  10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Advertised auto-negotiation: Yes
        Speed: 100Mb/s
        Duplex: Full
        Port: Twisted Pair
        PHYAD: 0
        Transceiver: internal
        Auto-negotiation: on
        Supports Wake-on: umbg
        Wake-on: g
        Current message level: 0x00000007 (7)
        Link detected: yes
[root at hobbit ~]# ifconfig eth0
eth0      Link encap:Ethernet  HWaddr 00:0B:DB:46:68:35
          inet addr:10.15.10.17  Bcast:10.15.255.255  Mask:255.255.0.0
          inet6 addr: fe80::20b:dbff:fe46:6835/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:3516353 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1803619 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:940914387 (897.3 MiB)  TX bytes:1679371626 (1.5 GiB)
          Base address:0xdd40 Memory:fe9e0000-fea00000

If you are using a managed switch, you can check if both sides
autonegotiated to the same speed. If you are using an unmanaged
switch, set it to a low value (i.e., 10baseT/Half) and work your way
up from there.

-- 
Hakan (m1fcj) - http://www.hititgunesi.org