Hi Gavin, Sorry for the delay in responding, I had a few days down time. The mirror-mode configuration was selected as data consistency, reducing chance of conflicts and high availability are all characteristics that we wish to have in the platform. It may be that I have selected the wrong topology, but reading the manual the Mirror-mode topology appeared to hit all the right points.
I wanted to reduce the chances of having to deal with write conflicts due to multiple writes been sent multiple providers at a time.
Hope this explains the rational.
Cheers
Wayne
-----Original Message----- From: Gavin Henry ghenry@suretec.co.uk Sent: 13 August 2021 22:07 To: Mcnaught, Wayne Wayne.McNaught@landregistry.gov.uk Cc: openldap-technical@openldap.org Subject: Re: Configuring OpenLdap Proxy for Mirror-Mode
Hi Wayne,
Ah, OK. What's your concern with just running with N-Way?
Thanks.
On Fri, 13 Aug 2021 at 21:33, Wayne McNaught wayne.mcnaught@landregistry.gov.uk wrote:
Hi Gavin, Thanks for responding. At the moment we have 3 back-end OpenLDAP servers V2.4 in Multi-Master mode with N-Way Multi-Provider replication. We have then fronted these with 3 front-end OpenLDAP servers using a BACK-LDAP proxy to direct the traffic to one node, which changes the configuration to be a Mirror-Mode configuration. As we have 3 proxies for HA there are concerns that if the proxies come out of line writes would be going to multiple backends and remove the advantages of using this mode. Wayne
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