[bind10-dev] hardwiring negative cache entries

[Michael Graff]

Sounds like Paul's RPZ. 

--Michael (from an iPhone)


On Nov 28, 2010, at 1:01, Jerry Scharf <scharf at isc.org> wrote:

> This is something for the recursive team to think about.
> 
> Larissa and I did a survey and we asked people about the features they would like. One came across that I wanted to share with the recursive team. I'm not suggesting that the feature be built at any time, but that the cache model allow for something like this.
> 
> The person said that 40% of their queries are for domains that don't exist. This has a huge negative impact on the recursive server capacity. To solve it, they have created local authoritative zones that return errors and make the performance close to normal. They wanted some way to do this without having to create and operate all these fake zones.
> 
> What that translated to in my mind was the ability to permanently wire negative cache entries in via some form of configuration and/or datastore. I can see all sorts of operational benefits to having this and it could be a motivation to move to BIND 10.
> 
> I am not suggesting that any work be done on this. Rather I was thinking that as you go about designing the caching for the recursive server, just be aware that some day this may want to be added. A bit of forethought now could save significant work later.
> 
> jerry s
> 
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