That MIT paper

Wed Aug 11 16:49:18 UTC 2004

what i meant by "act globally, think locally" in connection with That
MIT Paper is that the caching effects seen at mit are at best
representative of that part of mit's campus for that week, and that
even a variance of 1% in caching effectiveness at MIT that's due to
generally high or low TTL's (on A, or MX, or any other kind of data)
becomes a huge factor in f-root's load, since MIT's load is only one
drop in a larger ocean.  see duane's paper, which is more of a "think
globally, act locally" kind of thing.  how much of the measured traffic
was due to bad logic in caching/forwarding servers, or in clients?  how
will high and low ttl's affect bad logic that's known to be in wide
deployment?  what if 20,000 enterprise networks the size of MIT all
saw a 1% decrease in caching effectiveness due to generally low TTL's?
(what if a general decline in TTL's resulted from publication of That
MIT Paper?)

here's a snapshot of f-root's life.  That MIT Paper not only fails to
address it, and fails to take it into account, it fails to identify
the global characteristic of the variables under study.  caching
performance is not simply a local issue.  everyone connected to the
internet acts globally.  it is wildly foolish to think locally.

16:44:35.118922 208.139.64.98.12978 > 192.5.5.241.53:  16218 AAAA? H.ROOT-SERVERS.NET. (36)
16:44:35.121171 208.139.64.98.12978 > 192.5.5.241.53:  10080 A6? H.ROOT-SERVERS.NET. (36)
16:44:35.124668 208.139.64.98.12978 > 192.5.5.241.53:  1902 AAAA? C.ROOT-SERVERS.NET. (36)
16:44:35.127544 208.139.64.98.12978 > 192.5.5.241.53:  10098 AAAA? G.ROOT-SERVERS.NET. (36)
16:44:35.130185 208.139.64.98.12978 > 192.5.5.241.53:  6010 A6? C.ROOT-SERVERS.NET. (36)
16:44:35.133828 208.139.64.98.12978 > 192.5.5.241.53:  1920 A6? G.ROOT-SERVERS.NET. (36)
16:44:35.136286 208.139.64.98.12978 > 192.5.5.241.53:  12169 AAAA? F.ROOT-SERVERS.NET. (36)
16:44:35.139433 208.139.64.98.12978 > 192.5.5.241.53:  3988 A6? F.ROOT-SERVERS.NET. (36)
16:44:35.142324 208.139.64.98.12978 > 192.5.5.241.53:  10140 A6? B.ROOT-SERVERS.NET. (36)
16:44:35.145453 208.139.64.98.12978 > 192.5.5.241.53:  14244 AAAA? B.ROOT-SERVERS.NET. (36)
16:44:35.149344 208.139.64.98.12978 > 192.5.5.241.53:  16297 A6? J.ROOT-SERVERS.NET. (36)
16:44:35.151674 208.139.64.98.12978 > 192.5.5.241.53:  1968 AAAA? J.ROOT-SERVERS.NET. (36)