Scp takes more time to copy and stalls

scp

I am using Ubuntu with a 2Mbps link. I would do scp to the Ubuntu cloud servers to copy a .war file which is 14MB. It used to take only 2 minutes to copy this .war file under /tmp of the cloud server. Now it takes more than 15 minutes.

While doing scp it stalls and restarts again. The scp progress looks like this:

app1.war                     15%    2320KB  61.3KB/s - stalled -^

Any tips? I'm asked to fix this soon.

The output of tcpdump -n -n host my-dest-ip and port 22 is (I just stopped it with Ctrl+C)

tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
^C
0 packets captured
0 packets received by filter
0 packets dropped by kernel

Best Answer

it would be useful to find out if anything obvious is going wrong at the network level. do you have root on either end? can you do a tcpdump to isolate the scp datastream?

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