North American Network Operators Group
Date Prev | Date Next |
Date Index |
Thread Index |
Author Index |
Historical
Re: [dnsop] DNS Anycast revisited (fwd)
- From: Patrick W. Gilmore
- Date: Wed May 04 00:37:52 2005
On May 3, 2005, at 10:28 PM, Nicholas Suan wrote:
In the previous paragraph Vixie said:
while i'm on the subject, i also remain convinced that using
anycast to do
distributed load balancing for applications like WWW, on the
assumption
that the path you heard a dns query on is instructive as to what
content
would be best to answer with, is silly, and will more often do
harm or do
nothing than do good. (and i've told akamai and speedera this
many times.)
("but it makes for great marketing slideware.")
In other words this is a bad idea:
[FT@fenrir FT]$ dig a248.e.akamai.net @69.45.79.10
;; ANSWER SECTION:
a248.e.akamai.net. 20 IN A 80.67.72.214
a248.e.akamai.net. 20 IN A 80.67.72.201
FT@inuyasha:~$ dig a248.e.akamai.net @69.45.79.10
;; ANSWER SECTION:
a248.e.akamai.net. 20 IN A 69.45.79.15
a248.e.akamai.net. 20 IN A 69.45.79.16
While I'm not a mind reader, It seems he's saying that, since
Ultradns doesn't use anycast to do this, it is an example of 'good
anycast.'
I'm not a mind reader either, but I read English. (Well, I try
sometimes. :) Paul said:
<quote>
i also remain convinced that using anycast to do distributed load
balancing for applications like WWW, ... is silly, and will more
often do harm or do nothing than do good. (and i've told akamai and
speedera this many times.)
</quote>
The fact your digs returned different IPs for the same hostname has
_nothing_ to do with anycast.
Whether (or not) UltraDNS doing this (or not) is good (or not) seems,
to me at least, to be apples & oranges.
--
TTFN,
patrick
|
