On Wed, Mar 28, 2012 at 14:15, Moritz Struebe
<
Moritz.Struebe@informatik.uni-erlangen.de> wrote:
> Did you make sure you have the same connection settings (Network, Image
> compression, etc)
>
> Cheers
> Morty
>
> On 2012-03-28 14:05, Eugene San wrote:
>> Hi all,
>>
>> I want to discuss the subject.
>>
>> Story goes like this:
>> About 6 months, while planning upgrade (Ununtu 11.04->11.10) I've
>> noticed severe degradation in speed of NX sessions.
>> At the time I've decided to wait until LTS release, while being sure
>> issue is related to GUI changes in Ubuntu.
>> Recently I've reviewed the situation with 12.04 and found that problem
>> is still there and related to NX and not to GUI changes in Ubuntu.
>> My guess is that surrounding changes in distribution cause NX agent to
>> misbehave.
>>
>> Overall user experience became unusable even on LAN and localhost connections.
>>
>> Now to the details:
>> 1. Screen redraw operations lags heavily even on local links.
>> Instant (sub 0.5sec) on U10.04, up to 5 seconds on U12.04.
>> 2. Constant screen redraws consume much more traffic.
>> Sub 100kbps on U10.04.
>> 10mbps+ on U12.04 (Creating session with WAN quality settings and
>> reconnecting with LAN, lowers bandwidth to sub 1mbps but picture
>> quality suffers)
>> 3. NX4 on U12.04 is faster 3x (in average) than 3.5 on U10.04.
>> 4. NX3.5 on U12.04 is slower 3x then NX3.5 on U10.04 (some tests are
>> x1000 slower!)
>> 5. Hybrid NX3.5<->NX4 is slow with NX3.5 as server and fast with NX4 as server.
>>
>> Some details:
>> * I've evaluated both 32 and 64 bit platforms.
>> * I've compared fresh Ubuntu 10.04 and 12.04.
>> * Both Nomachine NX binaries and X2GO binaries (ppa:x2go/ppa) were tested.
>> * For reference I've performed NX4 and hybrid NX3.5<->NX4 testing.
>> * Tested several usecases:
>> * Desktop with manual operation of terminal, webbrowser and random
>> GUI application.
>> * Rootless UnixBench in graphics mode. (Note in 64bit test caches NX agent!)
>> * Desktop UnixBench in graphics mode. (Note in 64bit test caches NX agent!)
>> * Rootless Xterm with scrolling text (ls -R /)
>>
>> Please provide your feedbacks.
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>>
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>>
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>
>
> --
> Dipl.-Ing. Moritz 'Morty' Struebe (Wissenschaftlicher Mitarbeiter)
> Lehrstuhl für Informatik 4 (Verteilte Systeme und Betriebssysteme)
> Friedrich-Alexander-Universität Erlangen-Nürnberg
> Martensstr. 1
> 91058 Erlangen
>
> Tel :
+49 9131 85-25419
> Fax :
+49 9131 85-28732
> eMail :
struebe@informatik.uni-erlangen.de
> WWW :
http://www4.informatik.uni-erlangen.de/~morty
>
>
>
>
>
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