Re: Fault-tolerance for master OpenLDAP server

To: stran@amnh.org
Subject: Re: Fault-tolerance for master OpenLDAP server
From: Mike Jackson <mj@sci.fi>
Date: Thu, 01 Sep 2005 21:00:28 +0300
Cc: openldap <openldap-software@OpenLDAP.org>
In-reply-to: <1377.66.114.85.133.1125537156.squirrel@webmail.amnh.org>
References: <00d101c5ad86$6737f2f0$7cd90180@cegedim.cegedimgroup> <6.2.1.2.0.20050831172209.05970858@mail.openldap.org> <1377.66.114.85.133.1125537156.squirrel@webmail.amnh.org>
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Samuel Tran wrote:

Hi All,

I would like to make my OpenLDAP setup more fault-tolerant by introducing
a second master server.

There are a couple of high-avalaibility solutions, Heartbeat + DRDB being
one of them.

If any of you have already implemented such a solution with your OpenLDAP
setup, could you please share your experience/configuration?

Any input would be very much appreciated.

There is simply no way to achieve HA writes with a single-master replication model. You can have HA reading, however.

--
mike

References:
- Re: Value of entryUUID attribute can change ?
  - From: "Kurt D. Zeilenga" <Kurt@OpenLDAP.org>
- Fault-tolerance for master OpenLDAP server
  - From: "Samuel Tran" <stran@amnh.org>