[Opensim-dev] General status of OpenSim on 64 bit Linux Architecture

[Sacha Magne]

I disagree completly. Osim run fine in 64Bits. All our sims are in 64B  
and we don't experience any majour issues.


Sacha


Le 18 juin 09 à 19:39, Nebadon Izumi a écrit :

> regardless of PAE in 32 bit mode the most memory OpenSim.exe could  
> consumeis 3.3gb of ram, Also my experience with 64 bit is less than  
> good, in windows there is no 64 bit with OpenSim, you can not make  
> ODE run in 64 bit mode in windows, and in Linux i experiece major  
> issues with openjpeg in 64 bit mode, I personally do not suggest  
> anyone run OpenSim in 64 bit mode unless you like issues.  and to be  
> honest I have not seen a single case to date where any OpenSimulator  
> could run much past 2gb of ram anyway without totally blowing up, My  
> conclusion to 64 bit opensimulator is that you would be completly  
> wasting your time, the only way a 64 bit system is good is if you  
> have more than 4gb ram and plan on running multiple single instance  
> simulators in 32bit emulated mode where the total combined  
> requirements of the multiple simulators combined equals more than  
> 3.5gb ram.  Otherwise running opensimulator in 64bit mode gains you  
> absolutely nothing but problems trying to run in Native 64 bit mode.
>
> Neb
>
> On Thu, Jun 18, 2009 at 10:21 AM, Mike Dickson <mike.dickson at hp.com>  
> wrote:
> It doesn't take alot of "tricks" to use beyond 3.5GB of memory with  
> a 32
> bit OS.  The PAE kernel will handle it. I have one system with 24GB
> that's 32bit (for othe reasons).  I've also run OpenSIm 64bit fine
> recently so I think either approach is feasible.  If I was starting  
> from
> scratch with a system with lots of memory I'd probably do 64bit...
>
> Mike
>
>
> On Thu, 2009-06-18 at 16:45 +0000, Salahzar Stenvaag wrote:
> > I was curious to understand the current status of OpenSim on Linux
> > architectures (such as Linux Red Hat Enterprise 5 or similar)  
> using 64
> > bit to access all the available memory.
> > Browsing the documentation it seems that OpenSim can run under 64  
> bit,
> > but I've seen MANY mantis referring to problems with 64 bit
> > compilation and running.
> > Also in the past I've seen some people dropping their 64 bit regions
> > (and installing instead 32 bit version) because they didn't work as
> > expected (instability, strange collision effects etc).
> > I've also seen a 32bit-OpenSim-launcher.exe (or something similar)  
> who
> > allegedly can run opensim in 32 bit mode even on 64 bit systems, but
> > do not know if this applies only to 64-bit windows or also to linux
> > systems. There is some information on the wiki, but it appears quite
> > outdated right now.
> >
> > So the question is: if people want to install opensim on a 64 bit
> > system with say 8 Gbram, what do you suggest?
> > 1\ don't even think that throw away 64 bit system and use a 32 bit
> > system using just the 3.5 G ram it can access?
> > 2\ use some tricks to launch opensim.exe as if it were a 32 bit?
> > 3\ install 32 bit OS and use some tricks to make it see the memory  
> beyond 3.5 G?
> > 4\ go on and use 64 bit system it works like a charme and all the
> > MANTIS and the old problems had vanished in the void? :)
> >
> > Thanks for any suggestion on that and if you already run OpenSim on
> > RedHat 64 bit if you have any suggestions...
> > sal
> >
> >
> >
> > Rodney Dangerfield  - "What a dog I got, his favorite bone is in my
> > arm." - http://www.brainyquote.com/quotes/authors/r/rodney_dangerfield.html
> > _______________________________________________
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>
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>
>
> -- 
> Michael Emory Cerquoni - Nebadon Izumi @ http://osgrid.org
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Sacha Magne
sacha.magne at k-grid.com

K-Grid, the Kool grid for the Kool Kats
http://K-grid.com



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