[wrfems] Clustering issues

[Robert Rozumalski]

Thanks for the input Kevin! - Bob

Kevin McGrath wrote:
> Mark,
> Below are samples of our host files from the head node, and a slave  
> that seemed to satisfy the requirements of netcheck when we were 
> running a cluster.   The head node was rlx-w-lobo and would be 
> specified in the localhost line. Lobo has two network cards one set 
> to  198.206.41.140 which is the outside internet, and 192.168.0.1 
> which was the gateway to the cluster and connected to a switch that 
> the nodes hooked up to.
>
> RLX is not running a clustered configuration anymore since we are 
> using boxes with dual quad core CPU's. This has cut down on our 
> hardware requirement considerably.  But this hostfile configuration 
> worked in the past...
>
> For the head node:
> # Do not remove the following line, or various programs
> # that require network functionality will fail.
> 127.0.0.1               rlx-w-lobo localhost.localdomain localhost
> ::1             localhost6.localdomain6 localhost6
> # Set hosts for cluster
> 192.168.0.2  node1
> 192.168.0.3  node2
> 192.168.0.4 node3
> 192.168.0.5 node4
>
> Sample hostfile for the node:
> # Do not remove the following line, or various programs
> # that require network functionality will fail.
> 127.0.0.1 localhost.localdomain localhost
> ::1             localhost6.localdomain6 localhost6
> 198.206.41.xxx rlx-w-lobo
> 192.168.0.1 rlx-w-node0
> 192.168.0.2 rlx-w-node1
> 192.168.0.3 rlx-w-node2
> 192.168.0.4 rlx-w-node3
> 192.168.0.5 rlx-w-node4
>
>
> Mark Jarvis wrote:
>>  Hello:
>>
>> Is there a step by step guide out there about clustering and what 
>> MPICH2 actually needs?  For instance, what needs to be in the hosts 
>> file?  Do all the nodes need an NFS mount to /usr1 on node1?  I was 
>> having problems previous with the NFS mounting, but figured out the 
>> problem there.
>>
>> I'm just trying to cluster with two workstations and the hosts file 
>> thing is really messing with netcheck.  Am not sure what needs to go 
>> in the hosts file.
>>
>> Mark @ Louisville, KY
>> _______________________________________________
>> wrfems mailing list
>> wrfems at comet.ucar.edu
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> wrfems at comet.ucar.edu

-- 
Robert A. Rozumalski, PhD
NWS National SOO Science and Training Resource Coordinator

COMET/UCAR PO Box 3000   Phone:  303.497.8356
Boulder, CO 80307-3000