[dns-operations] Increasing the number of search path entries in a stub resolver

[Florian Weimer]

Our stub resolver currently has a hard limit for 6 search domains that 
can be specified in /etc/resolv.conf.  We are considering lifting that 
limit.  Apparently, this is desirable for deployments which migrate from 
NIS host name lookups to DNS because NIS supports a larger number of 
default domain names (or something equivalent to that).

 From a larger ecosystem perspective, do you think that longer search 
paths would increase resolver load in an unacceptable way?  For example, 
host name lookups with a 10-element search path could easily require 20 
queries.

Thanks,
Florian