[evla-sw-discuss] DNS lookups

[Pete Whiteis]

>
>    Is there a real reason why the monitor software needs to
> know hostnames for every point?   Why can't everything be
> reported and stored as IP addresses and if a human needs
> the hostname do the lookup then.
>
Part of the problem is that software for a given module is generic 
across all its IF's.   Therefore the L302 monitor point C_LOCK for 
Antenna 13 L302-1 is indistinguishable from C_LOCK for Antenna 13 
L302-2.   This is a problem when operations is trying to determine which 
Module is going into alert.   The user friendly way of resolving this 
issue (as I understand it) was for the alert handling software to 
reverse DNS lookup the IP number and prepend the module name to the 
alert which is displayed.    

>
>    Alternatively is there any reason not to use a table (other
> than redundancy of effort) for the hostname/IP pairs on
> mctest/mcmonitor etc?

Since the name/IP relationship is invariant (I hope), this approach 
should work fine, I would think.

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