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Troubleshooting Cisco IP Telephony and Video (CTCOLLAB) Foundation Learning Guide (CCNP Collaboration Exam 300-080 CTCOLLAB) by Justin Jordan, Brian Morgan

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Chapter 5. Troubleshooting Data Replication Issues

Within a Cisco Unified Communications Manager (CUCM) cluster, database replication is one of the more crucial functions for optimal performance. This is due to an ever-changing database. The cluster consists of the CUCM publisher and subscribers. The terms publisher and subscriber are derived from database operations and functionality. The primary database is maintained by the publisher and pushed to the subscribers. That is, the subscribers carry an active subscription to the information published and offered by the publisher. It seems obvious. But often the source of the terminology is unknown. Knowing that it’s all about database replication seems to demystify the idea of the cluster, consisting ...

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