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erver 2010 and its Back End SQL Database on Dell™ PowerEdge™ ServersContentsExecutive Summary .................................................................................................... 5 Introduction, Scope, and Purpose ................................................................................... 6 Advantages of Dell with Lync Server ................................................................................ 6 Overview of Lync Server ............................................................................................... 9 Topology Builder ..................................................................................................... 9 Central Management Store and Active Directory............................................................. 10 Lync Server Management Shell and Lync Control Panel..................................................... 10 Lync Server Roles .................................................................................................. 11 SQL Servers ......................................................................................................... 12 Test Methodology ..................................................................................................... 13 PowerEdge System Configuration .................................................................................. 14 Tools Used for Testing and Validation ............................................................................ 17 Stress and Performance Tool .................................................................................... 17 Performance Counters from Front End Server VMs and Hyper-V Host .................................... 18 Quality of Experience Reports ................................................................................... 19 Performance Counters from Back End Server ................................................................. 20 Load Generation Performance Counters ....................................................................... 21 Results and Analysis .................................................................................................. 22 Results from the Front End Server VM(s) Counters .......................................................... 23 Results from Host Counters ...................................................................................... 24 Quality of Experience Results ................................................................................... 26 Stress and Performance Tool Counters ........................................................................ 27 Back End SQL Database Results ................................................................................. 27 Reference Configuration ............................................................................................ 30 Conclusion ............................................................................................................. 333A Sizing Study of Lync® Server 2010 and its Back End SQL Database on Dell™ PowerEdge™ ServersTablesTable 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8. Table 9. Table 10. Table 11. Table 12. Table 13. Table 14. Table 15. Table 16. Table 17. Table 18. Table 19. Configuration of R720 (Lync VMs host) ............................................................... 14 Configuration of R610 (Back-End Server) ..