Re: [Exim] database lookups & cdbs

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Author: robert rotman
Date:  
To: exim-users
Subject: Re: [Exim] database lookups & cdbs
On Thu, 10 Feb 2000, Ian Southam wrote:

> On Thu, Feb 10, 2000 at 11:12:26AM -0000 sysadmin wrote :
>
> > Would it seem sensible therfore that as a general rule anyone wanting to do
> > lookups (NIS, LDAP or other, etc.) for variables like "local_domains" should
> > really generate a cdb file from their master database periodically and
> > atomically move the new cdb to replace the existing cdb?
>


am in fear of managing things on my place with scripts.
on another topic (i build an radiusbackup with a script), a small error
accured and the backup-radius made an emty database.

if this happens to a mailserver tons of mails are bounced...
the database lookups works well on my place and i _NEED_ the flexibility
of the database.

IMHO, if you build cdb from a database you do not really need a databes!

what is the reason - when "local_domains" fails - that the mails are
_NOT_ placed in the queue waiting there til the database is able to answer
queries?

> Absolutely. As another poster said earlier it has huge advantages in terms of
> your system's resilience to parts of it being down.
>
> This method means that is your LDAP or SQL is down you mail keeps flowing,
> sure you probably cannot bring new accounts online but at least you are not
> flat on your face.
>


you can define backup databases as well.

> Centralised solutions look good on paper with one database feeding all the
> information out for the whole enterprise, the downside is that, if that
> central database isn't there neither is anything else.
>



robert



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di. robert rotman                                   inode.graz
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