[Beowulf] Remote procedure call (error)

prakash borade hpcatcnc at yahoo.com
Wed Jan 28 04:09:12 EST 2004


rgb thanks for your support

well i am trying to wite an client server application 
( monitoring sofware ) for my beowulf cluster
tell me what would be efficient either sockets or RPC

would open socket on each machine put an extra load
on the cluster or is it managable

--- "Robert G. Brown" <rgb at phy.duke.edu> wrote:
> On Tue, 27 Jan 2004, prakash borade wrote:
> 
> > have any body tried RPC programing on Linux 
> > i get
> > rpc unknown protocol error 
> > i am trying to diaply the message on the remote
> host
> 
> To do rpm programming you probably need a bunch of
> stuff configured and
> running that might or might not be turned off for
> security reasons.
> Check, for example, to see if the portmapper is
> running.  Also check
> iptables and/or ipchains to see if they are running
> and if so if any
> rules block access to the portmapper.
> 
> rpcinfo is also your friend:
> 
> rgb at lilith|T:3#rpcinfo -p lilith
>    program vers proto   port
>     100000    2   tcp    111  portmapper
>     100000    2   udp    111  portmapper
>     100024    1   udp  32768  status
>     100024    1   tcp  32768  status
>     391002    2   tcp  32769  sgi_fam
> 
> As a general rule, I'd consider the portmapper and
> rpc stuff to be a
> moderate security risk; lilith lives inside
> firewalls only.  I have had
> direct experience of systems cracked in the past
> through portmapper
> bugs, which perhaps makes me a bit paranoid.
> 
> What exactly are you trying to do?
> 
>    rgb
> 
> > 
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> -- 
> Robert G. Brown	                      
> http://www.phy.duke.edu/~rgb/
> Duke University Dept. of Physics, Box 90305
> Durham, N.C. 27708-0305
> Phone: 1-919-660-2567  Fax: 919-660-2525    
> email:rgb at phy.duke.edu
> 
> 
> 
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