Ken Schneider - openSUSE wrote:

Bogdan Cristea pecked at the keyboard and wrote:

...

I have seen recently a similar topic about the best ways to transfer files between two Linux boxes. My experience with two PCs with openSUSE 11.1 connected through a wireless router (802.11g) showed that the ssh protocol is not reliable enough to transfer big files (~250 MB). The ssh protocol seems to die after some time. Resuming the transfer is not possible, the entire file being downloaded from the beginning.

Use rsync with compression -z.

From my experience, ssh (rsh) is reliable for very large files. I routinely

Doesn't rsync usually use ssh for transport? Ssh also compresses by default, I don't think you can compress a compress data stream and gain anything. Does rsync turn off ssh compression when told to compress on its own? transfer multiple gigabyte-length files on a local network. I recall having problems with WiFi dropouts until I replaced the router. I think Bogdan may just be seeing a flaky router. I've had good luck with my current D-Link DIR-655. Regards, Lew -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

On Tue, 11 Aug 2009 17:56:38 +0200, Per Jessen wrote:

Lew Wolfgang wrote:

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Ken Schneider - openSUSE wrote:

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Use rsync with compression -z.

Doesn't rsync usually use ssh for transport? Ssh also compresses by default,

It does?? That's news to me. I don't think mine does.

It doesn't here, either, unless I add "Compression yes" to the .ssh/ config file for the connection in question. There is an option in /etc/ ssh_config to enable it, but the default is "no".

...

From my experience, ssh (rsh) is reliable for very large files. I routinely transfer multiple gigabyte-length files on a local network.

Every night, I transfer about two gigs over the internet from Germany. No probs.

Same here, but I have found that ssh is really touchy when it comes to lost packets. I used to tunnel VNC over SSH for a remote connection with a flakey NIC, and the ssh session was always dropping. I'd suggest that Bogdan might look to see if there's any packet loss taking place, because that would very likely cause a problem. Jim -- Jim Henderson Please keep on-topic replies on the list so everyone benefits -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

On Tuesday 11 August 2009 19:23:12 Jim Henderson wrote:

Same here, but I have found that ssh is really touchy when it comes to lost packets. I used to tunnel VNC over SSH for a remote connection with a flakey NIC, and the ssh session was always dropping. I'd suggest that Bogdan might look to see if there's any packet loss taking place, because that would very likely cause a problem.

The ssh connection seems to be unreliable only when using WiFi, wired connection works much better and faster. Using the same WiFi connection I am able to transfer several gigs using the samba client from a Win XP server. That's why my feeling was that is something wrong with the ssh client/server from openSUSE. I'll try to follow Dave suggestions and to investigate more carefully this issue. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org

On Tue, Aug 11, 2009 at 12:42 PM, Bogdan Cristea wrote:

The ssh connection seems to be unreliable only when using WiFi, wired connection works much better and faster.

I can get 10-11MB/s with wired and only 1-2.5MB/s with wireless(and that's with the laptop right beside the router). I've never gotten anywhere near the 5.4MB/s max of a wifi connection.

Using the same WiFi connection I am able to transfer several gigs using the samba client from a Win XP server. That's why my feeling was that is something wrong with the ssh client/server from openSUSE.

What type of router are you using? Wireless card? If you are using the ath5k driver for atheros based cards, I've found that it is very unreliable. I always build the madwifi driver because it's stable and gets much higher throughput(as well as actually making the lights on my pcmcia card work properly :-) ). My main router is a Netgear WGR416 v6. It's flakey on occasion, but better than my WGT624 v2(which drops at least once a day). I have a WRT54G router(flashed with DD-WRT), but it's being used as a wireless bridge until I get the time to actually run some wires. The stock firmware on the WRT54G was unreliable. I was gonna pitch it until I realized I could flash it. Been 100% rock solid since. Good luck. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org