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Achieving True Fault Resilience Through Stretched Oracle RAC Clusters and EMC VPLEX

Achieving True Fault Resilience Through Stretched Oracle RAC Clusters and EMC VPLEX. Strategies for Designing Solutions That Optimize Availability, Performance, and Cost. EMC Corporation. The Challenges with Stretching Oracle RAC. Host-based replication challenges

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Achieving True Fault Resilience Through Stretched Oracle RAC Clusters and EMC VPLEX

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  1. Achieving True Fault Resilience Through Stretched Oracle RAC Clusters and EMC VPLEX Strategies for Designing Solutions That Optimize Availability, Performance, and Cost EMC Corporation

  2. The Challenges with Stretching Oracle RAC • Host-based replication challenges • Complexity - implementation and ongoing management • Different approach than other availability solutions in the data center • Tech refresh / mobility • Given the requirement for constant RAC uptime, any issue with upgrading, scaling out, or moving data in the environment can be a big concern • Other concerns can include cost, performance, and application consistency on failure • Host CPU cycles, network expenses, RPO/RTO, etc.

  3. Oracle RAC Requirements • Mission critical business application availability • Optimal performance • Online scalability

  4. What Makes VPLEX Unique? • VPLEX enables users to • Have the exact SAME information… • In two separate locations… • Accessible at the SAME time… • From both locations VPLEX is an ideal solution for stretching RAC beyond the data center

  5. VPLEX maintains a cache-coherent image of all data at both sites, enabling active-active simultaneous I/O Traditional Storage at Distance vs. VPLEX LAN Backbone LAN Backbone Oracle RAC cluster Oracle RAC cluster Node 1 Node 1 Node 2 Node 2 Site 1 Site 2 Site 1 Site 2 Dual SAN switches Dual SAN switches VPLEX Clusters Active Passive Active Active Heterogeneous storage system

  6. Oracle RAC and VPLEX LAN Backbone LAN Backbone Node 1 Node 2 Oracle RAC cluster (primary) RAC interconnect Primary I/O path Primary I/O path Note: No Mirror I/O path required SAN switches Dedicated IP link Dedicated IP link VPLEXWitness (virtual machine) VPLEX Clusters VPLEX interconnect (dark fibre) “Identical” virtual volumes (actually the same volumes) Heterogeneous storage system Mirror A (active) Mirror B (active) Physical volumes

  7. Camtasia link

  8. Why VPLEX for Oracle RAC • Continuous availability • Simple DR testing • Ideal for tech refresh and data/application mobility • Optimal SAN performance • All reads local (cache/disk), no host overhead • 100% database and application consistency upon failure • Leverage for other servers in the data center • Interoperates with EMC and third party servers/arrays

  9. To Learn More Best Practices Whitepaper available on EMC.com: Oracle Extended RAC with EMC VPLEX Metro Contact your local EMC salesperson EMC has Oracle and VPLEX experts in the field that can help you develop your solution View our Distributed Oracle RAC with VPLEX whiteboard video on EMC.com

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