Re: Can we build a proper email cluster? (was: Re: Why is debian.org email so unreliable?)
On Wed, 13 Oct 2004, Wouter Verhelst wrote:
> On Wed, Oct 13, 2004 at 01:05:26PM +1000, Russell Coker wrote:
> > On Wed, 13 Oct 2004 07:29, Henrique de Moraes Holschuh <hmh@debian.org> wrote:
> > > The third is to not use LDAP for lookups, but rather cache them all in a
> > > local, exteremly fast DB (I hope we are already doing that!). That alone
> > > could get us a big speed increase on address resolution and rewriting,
> > > depending on how the MTA is configured.
> >
> > I've run an ISP with more than 1,000,000 users with LDAP used for the
> > back-end.
>
> Yes, but that was probably with the LDAP servers and the mail servers
> being in the same data center, or at least with a local replication.
>
> This is not the case for Debian; and yes, we already do have local fast
> DB caches (using libnss-db).
Useless unless the MTA does all LDAP lookups through libc, in which case it
doesn't even know it is using LDAP. For postfix, that would be non-optimal,
I have no idea about Exim.
--
"One disk to rule them all, One disk to find them. One disk to bring
them all and in the darkness grind them. In the Land of Redmond
where the shadows lie." -- The Silicon Valley Tarot
Henrique Holschuh
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