Re: [Condor-users] condor convention, i686 vs x86_64 architecture

[Alain EMPAIN <"alain.empain"@ulg.ac.be>]

Steven Timm wrote:
> I have a cluster of machines, some of which are x86_64 architecture
> (opteron) and some which are i686 (Intel Xeon).
> At the moment they are all running the 32-bit version of the linux
> kernel that comes with Sci. Linux 3.0.5.
>
> If we were to change it so that our opterons ran the x86_64 kernel
> and distro, while the others stayed at 32-bit, is there any
> native condor classad that could tell the difference between them?
> Or do they all appear the same?  It appears that there is no
> difference in the condor binaries for 32 vs 64 bit kernel/distro.
>
> What have other condor users done to be able to tell these
> two architectures apart, if you have them in the same condor pool?
>
> Thanks
>
> Steve Timm

Hello Steve,

I am using SciLinux 4.2 64bits and SciLinux 3.0.5 32bits on dual 
opterons and then condor_status gives
---------------
vm1@xxxxxxxxx LINUX       INTEL
vm2@xxxxxxxxx LINUX       INTEL
vm1@xxxxxxxxx LINUX       x86_64
vm2@xxxxxxxxx LINUX       x86_64

So it is easy to discriminate.
But I wonder if the difference is linked to SciLinux version or OS bit 
level !

Anyway, I made performance statistics regarding to long blast jobs 
(blast compiled for 32 bits Linux), to have an idea of the influence of 
32/64 bits OS on jobs : I gained 20 % simply running them on 64bits OS 
(another difference : kernel 32bits-2.4 vs 64bits-2.6).

So as soon as possible I will upgrade my nodes to SciLin 4.2 x86_64 !

Regards,

	Alain

--
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Please realize that proprietary formats are important tools
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