[Dnsmasq-discuss] Feature request = block-conf

[Simon Kelley]

On 06/02/2022 05:54, Ercolino de Spiacico wrote:
>  > Opinions, all?
> 
> The scripting solution would indeed solve the original feature request 
> in my view. But there's a new point that is now coming into scope.
> 
> Just to give the magnitude here I came across lists with 1.2M domains, 
> 40MB uncompressed pre 'address=//' formatting. Loading such a list 
> consumes about 100MB of RAM.
> 
> For the sake of ads/domain blocking I have identified two metrics:
> a) storage
> b) RAM
> 
> We normally have two common scenarios:
> 1) routers without mass storage
> 2) routers with mass storage available (e.g. USB)
> 
> for case 1) the script solution would help both a) and partially b) as 
> storage is essentially RAM on those devices.
> for case 2) though only a) is affected and somehow not that important here.
> 
> Using the script solution I have the feeling that we are still going to 
> get the full syntax 'address=/domain.com/' in RAM. But if it was dnsmasq 
> to give a different interpretation to the cached data though, so that 
> only domains or perhaps a very shorten syntax (e.g. -domain.com) can be 
> used, I would expect this to result into a demand reduction on b).

No. The RAM usage once the rule is parsed is always the same. (And you 
really need to be using 2.86 or later, which optimised both RAM and CPU 
for large lists.)

Simon.

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