Re: A Few Questions

[Adam Williams <awilliam@whitemice.org>]

On Fri, 2002-04-05 at 11:09, Geoff Silver wrote:
> > I think you need to look for some load-balanceing or clustering solution
> > (Turbo Linux?) to do this.  slapd as far as I know does not have a "fail
> > over" method,  which is what it sound like you are actually looking for.
> 
> Wow, I'm surprised there isn't the ability to do this.  So slaves are only
> really good for load balancing, not really redundancy (except manual
> failover).
> 
> Hmmm.  I wonder if libnss-ldap, libpam-ldap, etc contain (or could
> contain) code to fail over to a backup if the master is down.  Not quite
> as efficient, since the list of backups would have to be given to every
> application, but would still provide for some redundancy.

The list of LDAP servers can be distributed via SRV records in DNS
reducing to a very minimal the config information that actually has to
be plugged into the client(s). NSS LDAP supports SRV records, PAM
currently does not but the "next" version will (PADL has a patch, they
just need to apply it).