luizhbedin
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Enthusiast

DRS - Migration treshold Levels

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Does anyone know exactly what each "star" mean on DRS migration tresholds levels?

The documentation that I have only says (EX):

"Level 1: most cnservative: applies only five star recommendations...."

I want to know what is that stars to set the best treshold level for my environment.

Thanks All

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MR-T
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It's based on CPU & memory utilisation.

It will check this every 5 minutes (roughly).

Also, DRS will always work on CPU utilisation first, then look at RAM.

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MR-T

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MR-T
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I'd just leave the default of 3 stars if I were you.

Moving machines around too much won't help with memory sharing.

When VM's sit on a server for a while, the transparrent page sharing kicks in which means you'll see better utilisation. If you move VM's around this won't work as well.

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luizhbedin
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Ok.

But I want to know the concept of the stars...

:smileygrin:

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MR-T
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I don't think you'll be able to work out exactly what values match a star unless someone can share the formulae that VMware use.

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luizhbedin
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Ok, I think I´m making myself clear...

I just want to know what are the "basic rules" for it...

I know that one of these stars is affinitty...

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MR-T
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So the bar moves from conservative to aggresive.

5 stars - Conservative - Basically only machines which violate affinity rules or need moving due to maintenance mode will get 5 stars.

4 stars - Only machines which gaurantee an improvement in performance

3 stars - At least a good improvement in performance will be seen

2 stars - moderate improvement

1 stars - slight improvement

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luizhbedin
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:smileygrin:

OK. But this is too much general....

I want to know if this is based on CPU precessor use, or memory use... or something like this...

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MR-T
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It's based on CPU & memory utilisation.

It will check this every 5 minutes (roughly).

Also, DRS will always work on CPU utilisation first, then look at RAM.

Message was edited by:

MR-T

View solution in original post

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MR-T
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