SFTP very slow

[san9jay]

I am using Filezilla 2.2.19a on winXP SP2+all patches
I am connecting to a remote Solaris server.
I am trying to transfer a 80MB binary zip file from the
remote solaris server to the local drive.

My internet connection speed is (ADSL) 512KB/s down
128KB up.

My transfer speeds using FileZilla max out at
approximately 21KB/s using the SFTP protocol.

I repeated the transfer using WinSCP 3.80 (SFTP) for
the same remote Solaris server and same file and was
able to get about 38KB/s

I then repeated the transfer using scp from a Suse
Linux 9.1 box to the same Solaris server and same file
and was able to get about 47 KB/s

The test file was about 80MB.

Any ideas why Filezilla is so slow on sftp transfers?

/sanjay

[Tim Kosse]

This problem should be fixed in the upcoming FileZilla 3.
You can already get early test versions
fromhttp://filezilla-project.org/nightly.php

[san9jay]

Ok. Glad to hear this problem is being addressed.

I downloaded the Filezilla3 nightly (April 18) and gave it a
test. At least in that nightly there seems to be no
improvement. I still see about 21Kb.

I will wait till the Filezilla 3 gets released before
testing again.

/sanjay

[Tim Kosse]

Can you please try psftp.exe from
​http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html
and report which transfer speeds you get with it?
FileZilla's SFTP support is based on that. (An
interestingly, WinSCP uses PuTTY as well)

[san9jay]

unfortunately psftp does not report the transfer rates.

[jochenwezel]

when SFTP is FTP over SSH, I've seen this problem. But then
it applies to the OpenSSH server product on the server.
After a restart of the SSH server service/daemon, the
transfer performs fine, again.
I solved this issue by installed the latest OpenSSH server
product to the server.

[rafgeens]

I've just had the same problem with sftp over ssh2. A 10GB
file transferred at 270KB/s in Filezilla 2.2.11 . In SSH
Secure File Transfer it became 3900KB/s .

[Tim Kosse]

This problem will be fixed in FileZilla 3. You can download
nightly builds from ​http://filezilla-project.org/nightly.php