[mpich-discuss] Problems with running make

[Ron Palmer]

Thanks Reuti for your comments. I will peruse that FAQ detail.

I just thought of the fact that each of these rack computers have 4 
ethernet sockets, eth0 - eth3... I could connect the cluster on a 
separate ethernet sockets via an extra switch not connected to the 
internet or any other computers, and accept all communication among 
them, and keep iptables up on the ethx connected to the outside world. I 
guess I would have to set up routing tables or something. Ah, more 
reading :-)

Thanks for your help.
Ron

On 4/03/2014 00:13, Reuti wrote:
> Am 03.03.2014 um 01:34 schrieb Ron Palmer:
>
>> Gus,
>> I have just replied with the details of the success, but I will clarify your questions here, if it helps next time.
>>
>> Re the actual application to be run, 'inversion', I have only received binaries. I used to run them on gainsborough (without mpi) and that worked fine.
>>
>> Home directories are not nfs shared, they are individual and separate, only the name is repeated.
>>
>> I had tried password free ssh in all directions and permutations.
>>
>> I had iptables down on sargeant and up on the other two.
>>
>> Yes, I installed the gcc-gfortran.x86_64 AFTER I took those screnshots, and the post install output was identical to the top one (sargeant).
>>
>> I am unsure about cpi and fortran...
>>
>> Stuff remaining to get sorted out:
>> 1. Get that hyperthreading set up - what is your suggestions? Disable and let mpi manage the cores?
> It depends on your applications, whether you can make use of it. Test it with HT switched off, switched on and increase the number of processes, until you see that any process is no longer running at 100% and you judge that you don't tolerate this slow down.
>
> It's not uncommon to see an improvement up to 150% with HT turned on, but not 200% (depending on the workload).
>
>
>> 2. run mpiexec with iptables up, need to figure out what traffic to allow.
> https://wiki.mpich.org/mpich/index.php/Frequently_Asked_Questions#Q:_How_do_I_control_which_ports_MPICH_uses.3F
>
> -- Reuti
>
>
>> Great many thanks to all, and Gus, Reuti and Rajeev in particular.
>>
>> Cheers,
>> Ron
>>
>> On 3/03/2014 10:09, Gustavo Correa wrote:
>>> Hi Ron
>>>