If you missed the webinar, you can see the recording Here.

Starting in Db2 version 12.1.0, Pacemaker has replaced Tivoli System Automation & MultiPlatforms (a.k.a. TSA) as the integrated cluster manager for Db2 pureScale on Linux. In these Pacemaker-managed clusters, the concept of quorum is vital to maintaining data consistency, preventing split‑brain scenarios, and ensuring correct failover behaviour. This webinar dives into how Pacemaker uses quorum mechanisms to evaluate cluster health and host availability, exploring the rules and policies that govern the correct recovery operations performed during failure scenarios. We will discuss the different quorum policies available in a Db2 pureScale cluster, monitoring the quorum state, and the fencing mechanism. At the end of the presentation, a real network failure scenario will paint a clear picture of quorum in action and illustrate how the cluster recovers safely.

Speaker:

Justina Srebrnjak

Justina Srebrnjak started at IBM in 2021 as a software developer intern. As of 2023, she graduated with a BEng in Software Engineering from McMaster University and has transitioned to a full-time software developer position in the Db2 pureScale and High Availability team. During her time at IBM, she has focused on integrating Pacemaker with pureScale for Db2 version 12.1.0 and continues to work on improving high availability features for future Db2 versions.

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