https://theithollow.com/tags/satp/ Recent content in Satp on The IT Hollow Hugo en-us Thu, 08 Mar 2012 13:58:05 +0000 https://theithollow.com/2012/03/08/path-selection-policy-with-alua/ Thu, 08 Mar 2012 13:58:05 +0000 https://theithollow.com/2012/03/08/path-selection-policy-with-alua/ <p>It&rsquo;s important to understand how VMware ESXi servers handle connections to their associated storage arrays.</p> <p>If we look specifically with fibre channel fabrics, we have several multipathing options to be considered. There are three path selection policy (PSP) plugins that VMware uses natively to determine the I/O channel that data will travel over to the storage device.</p> <ol> <li>Fixed Path</li> <li>Most Recently Used (MRU)</li> <li>Round Robin (RR)</li> </ol> <p>Let&rsquo;s look at some examples of the three PSPs we&rsquo;ve mentioned and how they behave.  The definitions come from the vSphere 5 storage guide found below.</p>