Directory hashing

[Aki Tuomi]

> On 11/05/2020 11:10 Simone Lazzaris <s.lazzaris at interactive.eu> wrote:
> 
>  
> In data lunedì 11 maggio 2020 10:00:38 CEST, lists at mlserv.org ha scritto:
> > Hi,
> > 
> > I struggle with directory hashing. I want something like this:
> > 
> > /srv/mail/c/cf37a8dff5e360927ba10ab2
> > 
> > The final folder is simpel, as it is:
> > 
> > %{sha256;truncate=96:user}
> > 
> > But how do I get a first level from sha256? Unfortunately, the truncate
> > option aligns only full 8bit and does not divide into low and high nibbles.
> > How can I express this for sha256?
> > 
> > in MD5 this would be %1Mu
> > 
> > Many thanks in advance
> > 
> > Christian
> 
> Maybe as a workaround you can create a directory named /srv/mail/c and make 16 
> symbolic links to it: /srv/mail/c0, /srv/mail/c1, /srv/mail/c2,  up to /srv/
> mail/cf.
> 
> In that way you can use truncate=8.
> 
> 
> 
> -- 
> Simone Lazzaris
> QCom SpA

Out of curiosity, but why do you use SHA256? You get probably no extra benefit from it. I mean, you are free to do so, but ... why?

Anyways, it would work pretty much the same way, %1{sha256:..} and %4{sha256:...}.

Aki