--On Tuesday, February 2, 2021 12:54 AM +0000 paul.jc@yahoo.com wrote:

Hi all, We are setting up multi-master (3 providers) and are curious if it is recommended to use delta syncrepl between the providers vs standard sync. Currently, we have delta-sync set up between consumers and our single provider. Are there any gotchas with using delta syncrepl for provider-provider replication?

I am curious if a new provider is added, does/should the accesslog db get sync'd as well, or does each provider get its own unique accesslog db? And if each accesslog db is unique, how do consumers using delta syncrepl deal with a provider that has sync'd the change in its main db but not in the accesslog? Is this a non-issue if all consumers are aware of all providers and would that mean all consumers have to sync from all providers? I'm sure the answer to this is clear but I am missing it in the docs. Any input or clarification is appreciated.

Hi Paul,

You should use delta-syncrepl.

Accesslog databases are always unique to a given provider. How would a provider have a change in its main db that's not in its accesslog db? A new provider should always be initalized via an export from an existing provider via slapadd. It would then replicate any new changes since that point, which would then have them be in their accesslog DB.

I'd generally point consumers at at least 2 providers, preferably all providers. Or just get rid of consumers entirely and have everything be providers.

--Quanah

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Quanah Gibson-Mount Product Architect Symas Corporation Packaged, certified, and supported LDAP solutions powered by OpenLDAP: http://www.symas.com