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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>A couple of years ago, I staged a test environment using RHEL 5u1 with a few KVM guests that were provisioned with a direct LUN for use with Cluster Suite and resilient storage (GFS2). For whatever reason (on reflection, I may have overlooked the hypervisor’s virtio default setting for cache), the GFS2 filesystem would eventually “break” and leave it fencing guests. We had always run our clusters (dev-test-prod) on physical hosts before and since, so cluster configuration and operational understanding is not any issue.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>We now have RHEV-M in place to begin a whole new provisioning process on newer RHEL 6 hypervisors with RHEL 6 guests. My question (or fear) before embarking into this space is how resilient is resilient storage (GFS2) on KVM guests now? Are there any pitfalls to avoid out there?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><b><span style='font-size:8.0pt;font-family:"Tahoma","sans-serif";color:#000066'>Robert Hurst, Caché Systems Manager</span></b><span style='font-size:8.0pt;font-family:"Tahoma","sans-serif"'><br><b><span style='color:#3333FF'>Beth Israel Deaconess Medical Center</span></b><br><span style='color:#6666FF'>1135 Tremont Street, REN-7</span><br><span style='color:#6666FF'>Boston, Massachusetts 02120-2140</span><br><span style='color:#6666FF'>617-754-8754 ∙ Fax: 617-754-8730 ∙ Cell: 401-787-3154</span><br><span style='color:#9999FF'>Any technology distinguishable from magic is insufficiently advanced.</span></span><span style='font-size:8.0pt;font-family:"Tahoma","sans-serif"'><o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>