Multipathing Policies available in ESX & ESXi.


There are three Multipathing Policies available in ESXi server:

•Most Recently Used (MRU): Selects the first working path discovered at system boot time. If this path becomes unavailable, the ESXi host switches to an alternative path and continues to use the new path while it is available. This is the default policy for LUNs presented from an Active/Passive array.

•Fixed (Fixed): Uses the designated preferred path, if it has been configured. Otherwise, it uses the first working path discovered at system boot time. If the ESXi host cannot use the preferred path, it selects a random alternative available path. The ESXi host automatically reverts back to the preferred path as soon as the path becomes available. This is the default policy for LUNs presented from an Active/Active array.

•Round Robin (RR): Uses an automatic path selection rotating through all available paths and enabling the distribution of the load across the paths. For Active/Passive arrays, only the paths to the active controller will used in the round robin. For Active/Active arrays, all paths will used in the round robin. This policy is not currently supported for LUNs that are part of a Microsoft Cluster Service (MSCS) virtual machine.

About Alex Hunt

Hi All I am Manish Kumar Jha aka Alex Hunt. I am currently working in VMware Software India Pvt Ltd as Operations System Engineer (vCloud Air Operations). I have around 5 Years of IT experience and have exposure on VMware vSphere, vCloud Director, RHEL and modern data center technologies like Cisco UCS and Cisco Nexus 1000v and NSX. If you find any post informational to you please press like and share it across social media and leave your comments if you want to discuss further on any post. Disclaimer: All the information on this website is published in good faith and for general information purpose only. I don’t make any warranties about the completeness, reliability and accuracy of this information. Any action you take upon the information you find on this blog is strictly at your own risk. The Views and opinions published on this blog are my own and not the opinions of my employer or any of the vendors of the product discussed.
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