Node in Mainframe



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Node in Mainframe

Postby dk1987 » Mon Feb 01, 2016 12:11 pm

hi,

I've a very basic question. I'm hearing about this word - 'node' - in mainframe for sometime. But I really dont know what is a node in mainframe context. I know that JES is a node. But what does this node really means. Is it some kind of addon to z/OS? then how it is implemented and how can we add more nodes.

Please help me in understanding the concept about "node", at least in a high level.

Thanks
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Re: Node in Mainframe

 

Re: Node in Mainframe

Postby enrico-sorichetti » Mon Feb 01, 2016 12:39 pm

Node (graph theory),
a vertex in a mathematical graph,
a point in a network topology at which connections branch or terminate
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Re: Node in Mainframe

Postby dk1987 » Mon Feb 01, 2016 1:05 pm

hi,

my question was specific to 'node' in "mainframe" context, as I mentioned in my question.. :)
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Re: Node in Mainframe

Postby enrico-sorichetti » Mon Feb 01, 2016 1:29 pm

the node concept is the same in all environments ...
mainframe, server, workstation

complicated a bit by the conundrum physical VS logical

let' s keep it simple ...
ONE MAINFRAME ONE LPAR ONE NETWORK ADAPTER ONE IP Address, one Communication Controller for pre TCP network architecture

what do You want consider as a node
the MF the LPAR the NA the IP address, the CC
in the LPAR You have JES2, a ftp server, some CICS regions, NFS ... add as many applications as You want
what do You want consider as a node ...

in any environment something that is a terminal or a connecting point of the flow of information could be considered as a NODE
as per my first reply

and think before complaining about the answers You get. :evil:
cheers
enrico
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Re: Node in Mainframe

Postby Robert Sample » Mon Feb 01, 2016 8:09 pm

Did you know that IBM has an online glossary at https://www-03.ibm.com/ibm/history/docu ... ossary.pdf ? From this reference:
node 1. n. In a network, a point at which one or more functional units connect channels or data circuits. 2. n. In network topology, the point at an end of a branch. 3. n. The representation of a state or an event by means of a point on a diagram. 4. n. In a tree structure, a point at which subordinate items of data originate. 5. n. Any device, attached to a network, that transmits and receives data. 6. n. An endpoint of a link or a junction common to two or more links in a network. Nodes can be processors, communication controllers, cluster controllers, or terminals. Nodes can vary in routing and other functional capabilities. 7. n. In VTAM, a point in a network defined by a symbolic name.

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