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Hamish's avatar
Hamish
Icon for Cirrocumulus rankCirrocumulus
Sep 23, 2008

Multiple CNAME's...

Question... Why is there a blog in F5's website recommending multiple CNAME records for a name? It pretty comprehensively violates the RFC's and in Bind v9 is also impossible to do (Since bind9 checks...
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Hamish's avatar
Hamish
Icon for Cirrocumulus rankCirrocumulus
Sep 23, 2008
yeah... There's actually two links that mention it...

 

 

http://devcentral.f5.com/weblogs/macvittie/archive/2008/09/08/3596.aspx

 

 

and

 

 

http://devcentral.f5.com/weblogs/macvittie/archive/2008/09/19/3631.aspx

 

 

The first one I have issues with because it touts the multiple CNAME records as a cool hack... The second is worse... It touts it again, along with NOT using one of the more useful features of browsers (Relative links).

 

 

What the blogger has against persistent connections to enhance performance I don't know (They really speed things up, possibly more than many connections)... Browsers have a limit of two connections to a particular server for good reasons (Not performing a DOS on yourself being a pretty good one in my book).