Turbonomic Blog

Mor Cohen-Tal and Shai Benjamin

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In Sickness or In Health

Posted by Mor Cohen-Tal and Shai Benjamin on Nov 26, 2019 3:26:16 PM

A recent blog post from VMware’s CTO office discusses "DRS Pairwise Balancing", an allegedly improved version of DRS in vSphere 6.5 and later. "This new feature", the blog proclaims, "is needed as clusters keep on growing larger and larger." Turns out that some statistical measures used by old DRS became "statistical outliers" in larger clusters, that according to VMware "simply disappear as noise due to the vast number of hosts that experience far lower utilization” and thus fall "below the threshold required to trigger load balancing.”

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