BIND 9.3.1 Cache Server Optimization

[Joe Shen]

Hi,


> >Nothing. Those DNS records have extremely low TTL's so it constantly has
> >to go back to the authorative server to requery it for its A records.

But, some other DNS cache server located in the same IDC shows much
better performance( one of them shows only 1.87% timeout in past 24
hours for www.nba.com, while the new server shows 3.16%). The hardware
platform of the new server is much better than original ones.
Difference only exist with BIND version. The original version is
BIND9.2.3 for Solaris (SPARC) downloaded from www.sunfreeware.com, the
new version is BIND9.3.1 compiled with SunONE Studio9.


>=20
> Were the tests run simultaneously?=20

No, the test is scheduled every 5 minutes. Twenty 'dig www.nba.com A'
is executed one by one.

 Your test relies a great deal on the
> performance of the authoritive servers for www.nba.com.   If the tests
> were run at different times, you could be seeing variations in the
> performance of the authoritive servers over time.  There could also be
> differences in packet loss over the internet at different times.
>=20

Would 'cleaning-interval 0' do some help?=20

thanks a lot.

Joe