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GuenterKrembsle
Enthusiast
Enthusiast

Use ESXi Boot SSD as VMFS datastore also

Hello,

i have a small lab environment with one ESXi 6.7 host booting from 256 GB SSD.

This works fine without problem.

No i have a system where i wanted to test if running from SSD is improving the performance.

So i started a "storage vmotion" to move the VM to SSD, where the vmfs datastore is available.

I have the problem that the copy is soooooo slow, that i do not think this is a good idea.

Can it be, that ESXi is limiting access to the datastore so extremely "by design"?

As there's no other performance problem with the host itself, i guess this can be the only reason.

Thx for giving me a hint.

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DavoudTeimouri
Virtuoso
Virtuoso

Any write operation will be depended to source and destination speed.

May be, the source disk is the cause of slowness.

 

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Davoud Teimouri - https://www.teimouri.net - Twitter: @davoud_teimouri Facebook: https://www.facebook.com/teimouri.net/
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GuenterKrembsle
Enthusiast
Enthusiast

@DavoudTeimouri: this might be the cause but it's an Sasmung evo 860 SSD.

I could not see this slowness on boot or installing the host.

But i remember that there was some kind of "protection" in the esxi that would disallow some things to protect the hypervisor.

I will try to do some speedtest to check this out.

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