Re: OpenLdap working over NetGuard HA Solution

[Turbo Fredriksson <turbo@bayour.com>]

Quoting Víctor López <vlopez@amr.cl>:

> Hi,
> we are trying to find out if is possible to use OpenLdap over NetGuard
> Solution, specificaly with two Nodes sharing external disk and working in a
> Active-Stand By Solution.
> We are thinking don´t use LDAP replication Architecture, but we think share
> slapd database between those nodes, but only Active node could write over
> this database.
> Anybody knows if is possible to share LDAP database between two Nodes
> working with HA Solution?

Short answer: No

Long answer: If non of the other LDAP servers will be started when they are
             not active, then yes. The 'problem' is that slapd won't WRITE
             the data (unless told to) right away, it will keep stuff in
             memory not on disk. But even if you tell slapd to write data
             right away, you'll still get file sharing violations. So if
             _more than one_ slapd tries to use the files, then you will
             get a multitude of problems.
             But as long as only one slapd is STARTED at one time, then
             it's ok (but then you get host-standby, not load sharing).