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Provide some way to implement redundancy for multiple LDAP server on Sametime Community Server without load balancer

One of our customer used the following way to implement redundancy for multiple LDAP server on Sametime Community Server:

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This Sametime server has some strange setting in da.nsf and stconfig.nsf which have two LDAP documents to point to two Domino LDAP servers . These two Domino LDAP servers are in the same Domino Cluster and has the same directory data. The customer use these setting to implement redundancy for Domino LDAP.

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In current supported version of Sametime Community Server (9.0.x/10.0.x/11.x), the above way to implement redundancy for multiple LDAP server is not supported. Sametime only support this configuration when using a Load balancer.


But some customer think a load balancer need more cost and configuration is complicated, and wish Sametime could provide a simple way to implement redundancy for multiple LDAP server in future release.


For example, for a two LDAP server configuration, Sametime can provide some parameter to switch real connection from LDAP Server A to LDAP Server B if LDAP Server A is down.

  • Guest
  • Feb 2 2021
  • Needs review
  • Attach files
  • Guest commented
    25 May 04:55pm

    You can implement Round Robin DNS for this, and set the respray interval to 5 minutes. It won't be a perfect solution, but should get you a single host to use for LDAP. This will not perform any kind of health check to know if a server is up or down. A network load balancer is the best way. The re-spray parameter and other best practices are described here: https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0081763