About Zone refresh on a very big DNS server.
bortzmeyer at nic.fr
Fri Mar 9 10:34:25 UTC 2007
On Fri, Mar 09, 2007 at 02:26:27PM +0800,
? ?? <wangpenghui at gmail.com> wrote
a message of 24 lines which said:
> I have several DNS servers, each hosted more than one hundred
> thousand domains.
Not bad for a newbie :-)
> We used a cron job to refresh all the zone files once a hour. But
> once a hour is too long for us. But if we make the time shorter,
> These servers would have a very very high load.
I do not think that *all* the files are updated every hour. Then, why
don't you refresh only those whose data actually changed?
> The current method to refresh the zone files is using the follow
> command: /etc/init.d/named reload
Therefore, I do not know what "refreshing" is.
DLZ or a similar system? It has other
costs... (http://bind-dlz.sourceforge.net/, do note that DLZ is
standard in the last official BIND, 9.4)
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