How can I increase the TTL for the cached entries in my local dns serveder?
g.clinch at lancaster.ac.uk
Fri Mar 28 11:05:25 UTC 2014
On 28/03/2014 06:09, Hongyi Zhao wrote:
> In addtition, I also want to have long TTL so that I can obtain a short
> inquiry respond time.
Bind 9.10 might help in this regard - by refreshing cached records
before they expire, rather than by faking their expiry time. From the
> 3703. [func] To improve recursive resolver performance, cache
> records which are still being requested by clients
> can now be automatically refreshed from the
> authoritative server before they expire, reducing
> or eliminating the time window in which no answer
> is available in the cache. See the "prefetch" option
> for more details. [RT #35041]
Note that 9.10 is still in beta (http://www.isc.org/downloads/).
Small nit for ISC - the download page suggests there is an ARM for 9.10,
linking to http://www.isc.org/downloads/bind/doc/bind-9-10/ - but that
page contains the ARM for 9.9 (and thus, no details on prefetch). The
download for 9.10b2 does contain an ARM with details on prefetch.
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