How to handle short TTLs?
kcd at daimlerchrysler.com
Thu Oct 7 19:20:12 UTC 2004
Gary Mills wrote:
>We've been getting complaints that web browsers time out when
>they are attempting to access finance.yahoo.com. The problem
>seems to be that that name resolves to a CNAME and an A record
>that both have short TTLs:
> finance.yahoo.com 300 IN CNAME finance.yahoo2.akadns.net
> finance.yahoo2.akadns.net 60 IN A 188.8.131.52
>Consequently, they are never in our DNS cache when the user browses
>to that web site. When I test the lookup by hand, it does take
>five or ten seconds for the response to appear. What can be done
>about this? We are running the BIND 8.3.3 version that is shipped
>with recent Solaris 9 releases.
I can resolve finance.yahoo.com in 150 msec even without the CNAME or
the A record in my cache. So I think there's more to your problem than
just the shortness of the TTLs...
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