Hello, everyone. My name is Lourduma Reddy, Tirmala Reddy, and I'm a senior SAP consultant specializing in SAP basis and HANA administration with over 17 years of experience. I'm excited to welcome you all to this session. Today, I will be talking about how to achieve zero downtime SAP HANA database using high availability with pacemaker cluster setup. In today's digital economy, where system outages can cost enterprises millions of dollars per hour. Implementing robust high availability and disaster recovery solutions for SAP HANA in database has become mission critical. This presentation delivers an in depth exploration of architecting zero downtime SAP HANA environments using pacemaker cluster with a specific focus on performance optimized scale up and scale out systems replication configurations that achieve Subminute recovery time objectives. In this side, we'll see, about three pillars of SAP HANA high availability. The first one is fault tolerance. Guaranteeing continuous operations through system replication and seamless failover. Minimizing downtime and preventing data integrity. Second one is disaster recovery, protecting against catastrophic events with geographically dispersed data centers and rapid recovery strategies for business continuity. The third one is tenant duplication. Managing multiple SAP HANA tenants, also called instances, with independent failover capabilities, enabling targeted recovery and resource optimization. Here we can see how to achieve uptime up to 99 percent with advanced features like the first one is system replication, ensuring high availability by maintaining a synchronized secondary instance ready to take over in case of a primary instance failure. This technique guarantees minimal downtime and maintains data consistency. Second one is active configurations. Maximizing system utilization by allowing read only access to the second instance. This approach provides a performance boost and improves resource allocation while maintaining high availability. Third one is time travel capabilities. Recovering from data corruption or accidental changes by leveraging SAP HANA's time travel functionality. This powerful feature enables rollback to previous point in time, protecting time integrity and ensuring resilience. Here we see some real world success stories. And the testing frameworks prevented data loss. Discover how rigorous testing of HA cluster identified and mitigated potential data loss incidents during plan maintenance, ensuring business continuity and protecting critical information. Next one is comprehensive testing framework. Learn about the comprehensive testing framework covering various scenarios including graceful failover, primary secondary node rashes. and maintenance windows, ensuring the robustness and reliability of your HA solution. Here we see how to achieve maximum performance using strategy, scale up and scale out system replication architectures. First one is intelligent resource allocation, leverage advanced SAP HANA configurations that dynamically allocate up to 90 percent of no resources. like CPU or memory, optimizing computational efficiency and eliminating potential performance bottlenecks. The second one is seamless failover strategies. Implement preloaded secondary instances with sophisticated synchronization mechanisms, achieving sub minute failover times and guaranteeing near zero operational interruption during critical system events. Here we will see how can we leverage active read enabled configurations. Dynamic read distribution. Intelligently distribute read only transactions across synchronized HANA instances, minimizing primary stress load and improving overall system responsiveness. Next one is linear performance scaling. Unlock up to 100 percent additional computational capacity by enabling parallel read workloads across primary and secondary nodes without compromising data consistency. Here we'll see how to implement foolproof takeover decision frameworks. The first one is conduct comprehensive node health assessments using multidimensional metrics Such as analyze system performance, memory utilization, network connectivity, and real time response times to create a holistic view of cluster node status. The second one is implement SAP note 2063657 best practices. Integrate SAP's official guidance for configuring precise failover thresholds, defining weighted decision metrics and establishing automatic recovery protocols. The last one is design adaptive failover strategies with intelligent resource management. Create dynamic decision frameworks. that prioritizes workload continuity, minimizes potential data loss, and optimizes computational resource allocation during node transitions. Here we see how can you architect for scalability and future growth of high availability solution. The first one is predictive scaling. Anticipate future growth and design your HA solution with scalability in mind, ensuring seamless expansion and adoption as your business demands increase. The second one is modular design. Build a modular architecture allowing for incremental scaling and easy adoption of new components as your system expands. Maintaining flexibility and adaptability. The third one is automated provisioning. Embrace automated provisioning tools to simplify infrastructure management and enable rapid scaling. Ensuring agility and responsiveness in a constantly evolving environment. Here, these are one of the most important recommendations. How to secure your high availability architecture. The first one is access control. Implement strict access control measurements to restrict unauthorized access to your HA infrastructure. Protecting critical systems and sensitive data. Next one is data encryption. Ensure data confidentiality and integrity through encryption, at rest and in transit. Safeguarding sensitive information from potential breaches. The third one is regular security audits. Conduct regular security audits to identify vulnerabilities. And implement necessary security updates, ensuring the ongoing protection of your HA architecture. Here we see, how to monitor and maintain the HA solution for optimal performance. Real time monitoring. Deploy advanced monitoring solutions like Prometheus and Gafana to continuously track critical performance metrics. Such as CP, utilization, memory consumption, network latency, and system response times. The next one is proactive maintenance. Develop your comprehensive risk based maintenance strategy. That includes automated patch management, require system health assessments, performance tuning, and schedule infrastructure reviews Here, we'll go through some key takeaways and next steps. By leveraging pacemaker cluster and implementing best practices for system replication, active configurations, and robust failover mechanism, you can achieve a true zero downtime SAP HANA environment, maximizing system availability and resilience. Remember to prioritize testing, security, and ongoing monitoring to maintain optimal performance And ensure the long term success of your high availability solution. Thank you again for joining this session. Have a great day.