In article <[EMAIL PROTECTED]>, Chris Buxton <[EMAIL PROTECTED]> wrote:
> -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > That still sounds like a performance problem, as Kevin hinted. > > In this case, the qname is an alias of an alias (bad, but not > uncommon), and all three names are in different zones. > > www.yahoo.com.ar. 1800 IN CNAME hp2.latam.g1.b.yahoo.com. > hp2.latam.g1.b.yahoo.com. 300 IN CNAME us.hp2.latam.a1.b.yahoo.com. > us.hp2.latam.a1.b.yahoo.com. 300 IN A 98.136.43.19 > > That's at least 9 queries if the cache is empty at the beginning, more > if the resolver is verifying glue records. I only count 4 queries: www.yahoo.com.ar to ROOT returns delegation to AR servers www.yahoo.com.ar to AR server returns delegation to ns#.yahoo.com www.yahoo.com.ar to ns#.yahoo.com returns CNAME + delegation to yf#.yahoo.com hp2.latam.g1.b.yahoo.com to yf#.yahoo.com returns second CNAME and final answer All the delegations included glue records. -- Barry Margolin, [EMAIL PROTECTED] Arlington, MA *** PLEASE don't copy me on replies, I'll read them in the group ***
