[opensuse] slow nfs over wifi
Is wifi designed to be able to mount nfs shares? My connection is superb over Internet via my ISP but eg my xmas photos from my mobile took 10 minutes to download 20 Mb or so via nfs. And during nfs stuff the dlink connection to my router shows only 2 bars out of 5. As soon as nfs finishes it's back to 5/5. Maybe you're not supposed to use nfs over wireless. Please no 'works for me'. Just whether it can work properly or not. Only personal experiences please. No theory! 11.1 with a 64 bit nfs server and a laptop also on 11.1 connecting using kinternetmanager out of the box which I do not want to change. Phew. And my son thought i'd never be able to ask it. Luv L x -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
lynn wrote:
Is wifi designed to be able to mount nfs shares?
I doubt if it was designed for it, but it works just fine.
My connection is superb over Internet via my ISP but eg my xmas photos from my mobile took 10 minutes to download 20 Mb or so via nfs.
Can you describe the exact setup, please. It sounds as if your mobile has an NFS server, which it probably doesn't.
And during nfs stuff the dlink connection to my router shows only 2 bars out of 5. As soon as nfs finishes it's back to 5/5. Maybe you're not supposed to use nfs over wireless.
Nope, there is no such restriction.
Please no 'works for me'. Just whether it can work properly or not.
Yes it can. We use it regularly. /Per -- /Per Jessen, Zürich -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
Per Jessen wrote:
lynn wrote:
Is wifi designed to be able to mount nfs shares?
I doubt if it was designed for it, but it works just fine.
I guess I should describe my own setup - everything is running on local ethernet which is extended with a wireless LAN to which we connect with laptops when not wokring in the office itself. The laptops use the NFS shares from a central fileserver. /Per -- /Per Jessen, Zürich -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
Per Jessen wrote:
Per Jessen wrote:
lynn wrote:
Is wifi designed to be able to mount nfs shares?
I doubt if it was designed for it, but it works just fine.
I guess I should describe my own setup - everything is running on local ethernet which is extended with a wireless LAN to which we connect with laptops when not wokring in the office itself. The laptops use the NFS shares from a central fileserver.
A lot of people have problems separating functions of the various system components. WiFi is simply another physical layer, comparable to any other, such as ethernet or token ring. That layer does not care about content. Also, modern WiFi (802.11g or n) should be able to outrun most personal internet connections, which are typically less than 10 Mb. An 802.11g signal has a maximum bandwidth of about 54 Mb/s, though that's divided by more than half due to half duplex and other overhead. So, bottom line, a properly functioning WiFi link should not have a significant impact on throughput, when connecting over the internet, regardless of protocols. My bet is on a flakey WiFi router or NIC in the computer. In this instance, the hardware has some fault, which prevents it from operating properly under load. -- Use OpenOffice.org <http://www.openoffice.org> -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Sun, 2009-01-04 at 09:08 -0500, James Knott wrote:
Per Jessen wrote:
Per Jessen wrote:
lynn wrote:
Is wifi designed to be able to mount nfs shares?
I doubt if it was designed for it, but it works just fine.
I guess I should describe my own setup - everything is running on local ethernet which is extended with a wireless LAN to which we connect with laptops when not wokring in the office itself. The laptops use the NFS shares from a central fileserver.
A lot of people have problems separating functions of the various system components. WiFi is simply another physical layer, comparable to any other, such as ethernet or token ring. That layer does not care about content. Also, modern WiFi (802.11g or n) should be able to outrun most personal internet connections, which are typically less than 10 Mb. An 802.11g signal has a maximum bandwidth of about 54 Mb/s, though that's divided by more than half due to half duplex and other overhead. So, bottom line, a properly functioning WiFi link should not have a significant impact on throughput, when connecting over the internet, regardless of protocols. My bet is on a flakey WiFi router or NIC in the computer. In this instance, the hardware has some fault, which prevents it from operating properly under load.
Comparing NFS (huge amount of large packets) with Internet access won't do. A better (...) comparisson would be a large file transfer with sftp or rsync. Large enough to have it going for several minutes. See if the transfer rate is constant, or drops their also. There are a lot of other factors to consider. You might see five bars, indicating a strong signal, but are other on the same channel? When scanning fot open A.P. (ahum) i noticed that people seldom change their pwd and even more seldom change their channel (probably 6 or 11).. You might have five bars, but a dozen of your neighbours might see the same amount .;) Have a look with tcpdump: lot of re-transmissions? Enable debugging/tracing in NFS (server-side) Reducing MTU might also be helpfull btw, no problems with a "wired" NFS-connection? hw -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Sunday, 2009-01-04 at 12:15 +0100, lynn wrote:
Is wifi designed to be able to mount nfs shares? My connection is superb over Internet via my ISP but eg my xmas photos from my mobile took 10 minutes to download 20 Mb or so via nfs. And during nfs stuff the dlink connection to my router shows only 2 bars out of 5. As soon as nfs finishes it's back to 5/5. Maybe you're not supposed to use nfs over wireless. Please no 'works for me'. Just whether it can work properly or not. Only personal experiences please. No theory! 11.1 with a 64 bit nfs server and a laptop also on 11.1 connecting using kinternetmanager out of the box which I do not want to change. Phew. And my son thought i'd never be able to ask it.
You asked me too look, but I have no personal experience of nfs over wifi. My guess is that it may not work well: if the link drops for an instant I don't think NFS can cope too gracefully. The best thing would be FTP... or perhaps not, because either you get bad files or it has to repeat and repeat... which is probably why NFS is slow. Just try with ftp (or http) and compare. As to the connection quality graph, I suppose it shows normally "good", simply because it is not used. As soon as NFS uses it hard, it shows the real quality, which is "bad". That's my educated guess. So, I think that your real problem is the connection quality. - -- Cheers, Carlos E. R. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (GNU/Linux) iEYEARECAAYFAklgoi8ACgkQtTMYHG2NR9UE1wCeMIHyE9O97Omcevm2peYZM2pw NfsAniZLpmJaD79jAig7GX0GkH7PHNxv =eMc6 -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Sunday 04 January 2009 5:49 am, Carlos E. R. wrote:
You asked me too look, but I have no personal experience of nfs over wifi.
My guess is that it may not work well: if the link drops for an instant I don't think NFS can cope too gracefully. The best thing would be FTP... or perhaps not, because either you get bad files or it has to repeat and repeat... which is probably why NFS is slow. Just try with ftp (or http) and compare.
As to the connection quality graph, I suppose it shows normally "good", simply because it is not used. As soon as NFS uses it hard, it shows the real quality, which is "bad". That's my educated guess.
So, I think that your real problem is the connection quality.
I can go along with that as a possibility. I have been using NFS over wireless for quite some time. In my case the NFS server is connected to my router via wire but the client (Windows laptop) is connected to the router via wireless. I run quicken on the windows client but keep the data on the Linux (SuSE 9.3) server. Performance, reliability and integrity of the Quicken data have been problems. My wireless connection is rock solid because everything is on battery backup and the wireless signal is strong. Bob -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Sunday 04 January 2009 6:14 am, Robert Paulsen wrote:
On Sunday 04 January 2009 5:49 am, Carlos E. R. wrote:
You asked me too look, but I have no personal experience of nfs over wifi.
My guess is that it may not work well: if the link drops for an instant I don't think NFS can cope too gracefully. The best thing would be FTP... or perhaps not, because either you get bad files or it has to repeat and repeat... which is probably why NFS is slow. Just try with ftp (or http) and compare.
As to the connection quality graph, I suppose it shows normally "good", simply because it is not used. As soon as NFS uses it hard, it shows the real quality, which is "bad". That's my educated guess.
So, I think that your real problem is the connection quality.
I can go along with that as a possibility. I have been using NFS over wireless for quite some time. In my case the NFS server is connected to my router via wire but the client (Windows laptop) is connected to the router via wireless. I run quicken on the windows client but keep the data on the Linux (SuSE 9.3) server. Performance, reliability and integrity of the Quicken data have been problems.
My wireless connection is rock solid because everything is on battery backup and the wireless signal is strong.
Bob
Arrgh! Correction: "Performance, reliability and integrity of the Quicken data have *NOT* been problems. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
lynn wrote:
Is wifi designed to be able to mount nfs shares? My connection is superb over Internet via my ISP but eg my xmas photos from my mobile took 10 minutes to download 20 Mb or so via nfs. And during nfs stuff the dlink connection to my router shows only 2 bars out of 5. As soon as nfs finishes it's back to 5/5. Maybe you're not supposed to use nfs over wireless. Please no 'works for me'. Just whether it can work properly or not. Only personal experiences please. No theory! 11.1 with a 64 bit nfs server and a laptop also on 11.1 connecting using kinternetmanager out of the box which I do not want to change. Phew. And my son thought i'd never be able to ask it.
Luv L x
There should be no difference, as WiFi is essentially wireless ethernet, though it's half duplex, compared to full duplex on ethernet switches. I'd suspect other issues. What happens if you go to one of those "speed test" sites, such as www.speedtest.net, both with and without WiFi? -- Use OpenOffice.org <http://www.openoffice.org> -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Sun, Jan 4, 2009 at 06:15, lynn <lynn@steve-ss.com> wrote:
Is wifi designed to be able to mount nfs shares? My connection is superb over Internet via my ISP but eg my xmas photos from my mobile took 10 minutes to download 20 Mb or so via nfs. And during nfs stuff the dlink connection to my router shows only 2 bars out of 5. As soon as nfs finishes it's back to 5/5. Maybe you're not supposed to use nfs over wireless. Please no 'works for me'. Just whether it can work properly or not. Only personal experiences please. No theory! 11.1 with a 64 bit nfs server and a laptop also on 11.1 connecting using kinternetmanager out of the box which I do not want to change. Phew. And my son thought i'd never be able to ask it.
You are right, it does seem a bit slow, however mainly I use WiFi for internet access, so I never bothered to do any benchmark: user@linux-kcso:/multim/Videos> time cp Rammstein\ -\ Du\ Riechst\ So\ Gut.mpeg /home/user/ real 0m30.656s user 0m0.000s sys 0m0.544s user@linux-kcso:/multim/Videos> du Rammstein\ -\ Du\ Riechst\ So\ Gut.mpeg -sh 44M Rammstein - Du Riechst So Gut.mpeg That is 11.48 megabits/sec (44M / 30.65s = 1.43mB/sec * 8 = 11.48 mbps) ... I would say it seems "slow" but at the same time I would not expect to see a full 54mbps transfer rate on the WiFi (and have no other benchmarks to compare against... maybe you can do a benchmark yourself and compare? openSUSE 11.0 machine as the NFS server, connected via Ethernet to a Linksys WRT54GS v4 router running the newest DD-WRT firmware. Client is openSUSE 11.1 with an RAlink chipset wireless card. The router is placed high up, the client has an external antenna and is approx 15 feet away with just one (cheap drywall) wall between it and the router.Knetworkmanager shows 4/4 "bars." My WiFi router says the SNR is 33. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 lynn wrote:
Is wifi designed to be able to mount nfs shares? My connection is superb over Internet via my ISP but eg my xmas photos from my mobile took 10 minutes to download 20 Mb or so via nfs. And during nfs stuff the dlink connection to my router shows only 2 bars out of 5. As soon as nfs finishes it's back to 5/5. Maybe you're not supposed to use nfs over wireless. Please no 'works for me'. Just whether it can work properly or not. Only personal experiences please. No theory! 11.1 with a 64 bit nfs server and a laptop also on 11.1 connecting using kinternetmanager out of the box which I do not want to change. Phew. And my son thought i'd never be able to ask it.
Luv L x
Hmm... I think others maybe missing a point here (are we talking mobile phone, PDA or laptop computer?)... Are you are downloading photos from a mobile phone or PDA connected by USB to a PC or to local WiFi?. Do not expect same level of performance. Most mobile devices are somewhat slower at data functions than PCs. Also most mobile devices use lower WiFi connection speeds (and depending on the router involved this can impact on other usage). IIRC the connection goes through a QoS negotiation algorithm that establishes the speed at which data can most reliably transferred between device and AP (this different from ethernet packet collision control and operates at the physical layer). This is dynamic and can change during a connection. With different mixes of hardware and connection conditions expect different results. The ISP bit has me slightly confused, is your mobile phone supplier your ISP? - -- ============================================================================== I have always wished that my computer would be as easy to use as my telephone. My wish has come true. I no longer know how to use my telephone. Bjarne Stroustrup ============================================================================== -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (GNU/Linux) Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org iEYEARECAAYFAklh1NQACgkQasN0sSnLmgK5YQCgyR5K08+3hjr3Jvv5qt3agPp+ tF8An3/eJQoiqmnJIXD0RXNdGHNOnnzN =3JSN -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
On Monday 05 January 2009 10:37:24 G T Smith wrote:
lynn wrote:
Is wifi designed to be able to mount nfs shares? My connection is superb over Internet via my ISP but eg my xmas photos from my mobile took 10 minutes to download 20 Mb or so via nfs. And during nfs stuff the dlink connection to my router shows only 2 bars out of 5. As soon as nfs finishes it's back to 5/5. Maybe you're not supposed to use nfs over wireless. Please no 'works for me'. Just whether it can work properly or not. Only personal experiences please. No theory! 11.1 with a 64 bit nfs server and a laptop also on 11.1 connecting using kinternetmanager out of the box which I do not want to change. Phew. And my son thought i'd never be able to ask it.
Luv L x
Hmm...
I think others maybe missing a point here (are we talking mobile phone, PDA or laptop computer?)...
Are you are downloading photos from a mobile phone or PDA connected by USB to a PC or to local WiFi?. Do not expect same level of performance. Most mobile devices are somewhat slower at data functions than PCs. Also most mobile devices use lower WiFi connection speeds (and depending on the router involved this can impact on other usage).
IIRC the connection goes through a QoS negotiation algorithm that establishes the speed at which data can most reliably transferred between device and AP (this different from ethernet packet collision control and operates at the physical layer). This is dynamic and can change during a connection. With different mixes of hardware and connection conditions expect different results.
The ISP bit has me slightly confused, is your mobile phone supplier your ISP?
Th photos are on the server at 192.168.1.2. That exports to the lan via nfs. nfs is slow then. that's why I don't thing nfs was ever designed to transmit over a wifi connection. Luv L x -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
lynn wrote:
Th photos are on the server at 192.168.1.2. That exports to the lan via nfs. nfs is slow then. that's why I don't thing nfs was ever designed to transmit over a wifi connection.
No IP protocol is designed for WiFi. They're designed to go over whatever is available. In your original message, I and others got the impression you were downloading via the internet and some even thought some mobile device, such as a phone. I assume you've got that WiFi router connected to the internet and you have other computers behind it, at least one wired and one via WiFi. Is that correct? WiFi bandwidth is variable, due to a lot of influences, such as signal strength and interference (from other WiFi or other devices). With 802.11g, the maximum bandwidth is 54 Mb/s, but that is reduced by half duplex and overhead. If you have a slow connection, you might not notice it, with interactive apps, but you could notice it on a large file transfer. What happens if you use Samba, FTP or other file transfer protocol? -- Use OpenOffice.org <http://www.openoffice.org> -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
lynn wrote:
The photos are on the server at 192.168.1.2. That exports to the lan via nfs. nfs is slow then.
NFS is slow over your LAN? I thought your original question was focused on NFS over WLAN?
that's why I don't thing nfs was ever designed to transmit over a wifi connection.
No, it wasn't and it couldn't have been. NFS dates back to about 1985, wifi is a lot younger. /Per -- /Per Jessen, Zürich -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org
participants (8)
-
Andrew Joakimsen -
Carlos E. R. -
G T Smith -
Hans Witvliet -
James Knott -
lynn -
Per Jessen -
Robert Paulsen