[Halld-offline] ifarm = CentOS 7.7 now [Re: [Jlab-scicomp-briefs] JLab Scientific Computing Upcoming Changes]

[Mark Ito]

Folks,


Note the item quoted below from Bryan last Thursday. This means that 
when you log into ifarm today, you are logging into a different OS than 
you had when you logged in yesterday. Our software packages need to 
distinguish between code built on CentOS 7.2 vs. that built on CentOS 
7.7. That means stuff you compiled yesterday is not suitable for jobs 
you are running today. On ifarm, you need to recompile everything that 
you compile yourself.


Bryan also mentioned:


> Auger jobs  submitted after Tuesday morning, January 21st will default to CentOS 7.7.


I think that means that batch farm default for CENTOS7 nodes changed its 
default. [Someone should correct me here if that is incorrect.] Assuming 
I am right about that, if you choose vanilla CENTOS7 in your farm jobs, 
and it worked yesterday, it might not today if it depends on code you 
compile yourself, for reasons similar to those described above.


   -- Mark


On 1/16/2020 9:33 AM, Bryan Hess wrote:
> *Interactive Farm Upgrade to CentOS 7.7*
>
> On Tuesday, January 21st the /ifarm.jlab.org/ alias will be pointed to 
> CentOS 7.7 hosts only. ifarm1801 will be upgraded to CentOS 7.7. After 
> that change, the interactive farm will consist of ifarm1801 and 
> ifarm1802 running Intel Skylake processors, and ifarm1901 run AMD Epyc 
> "Rome" processors. The older ifarm1401 and ifarm1402 systems will 
> remain at CentOS 7.2 until the farm is completely transitioned, at 
> which point they will be retired.
>
>
> --Bryan
>
>
>
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