Re: [gentoo-cluster] RSH/SSH?

[Brady Catherman]

We have tons of bio apps that use stdout/stderr to send data. These  
programs can send gigs through SSH. We would prefer if it didn't have  
to get encrypted, passed over our secure network, and then be  
decrypted. It generates excess work for our Master node. Maintaining  
the keys also becomes an issue. We have 4 different platforms here.  
one little hickup with ssh means that everybody's accounts have to be  
fixed. If we use global rsh then we only have to fix it on the master/ 
slave images. Plus is just makes PBS run smoother.

Anyways, I think I got rlogin working. I can login password-less if I  
rlogin to localhost. Still can't do anything remotely though. Got  
BSU's cluster god to help me out a bit.. he's awesome with this  
stuff. When I get a final solution mind if I post to the list? The  
net seems to be full of people asking about this and nobody actually  
getting it to work.


On Nov 13, 2005, at 2:59 PM, Brian D. Ropers-Huilman wrote:

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> Might I ask what the intended use is?
>
> If you are pushing out commands, there are other tools for that.
>
> If you are deploying a job, we use SSH on our 512 node system just
> fine.
>
> Brady Catherman said the following on 2005-11-13 16:46:
>> ssh -vvv doesn't tell me where the failure happens. For now I have
>> given up on ssh and am just working on RSH. Seems that nobody
>> knows  how
>> to set RSH up on clusters. Problem is that 500+ ssh sessions can
>> eat p
>> CPU time on the master in a hurry. Problem is that RSH has no
>> debugging
>> information at all.. Closest I have gotten is getting  xinetd to
>> warn on
>> startup errors. Whats a guy got to do to get  information from his
>> daemons? =)
>>
>> (BTW, Why does everybody shrug off rsh? For clusters its perfectly
>> acceptable and if the cluster is large enough then its nearly
>> required.)
>>
>>
>> On Nov 13, 2005, at 2:30 PM, Donnie Berkholz wrote:
>>
>> Brady Catherman wrote:
>> | And whats up with the SSH/RSH developers not giving some form of
>> | debugging method? I mean.. The only thing you get for logging is
>> login
>> | notices. I can't find any way to get useful debugging out of RSH.
>>
>> Does `ssh -vvv` not give any useful debugging info?
>>
>> | Whats most frustrating is that this is effortless on Fedora. Very
>> | little file modification is needed.
>>
>> It might be interesting to look at any patches they apply that
>> they've
>> failed to send upstream.
>>
>> Thanks,
>> Donnie
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