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vCenter 6 VM Deployment from Template and Storage DRS

Posted on 2016-09-25
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Last Modified: 2016-10-02
We have DRS enabled on our clusters but set to manual mode for a number of reasons. I would like to setup and enable Storage DRS as well in manual mode.  When a junior admin deploys a VM from a template they select a host and datastore but on power one DRS will kick in and suggest the best host to place it on which is perfect. But for storage DFS when would the suggest kick in during the VM deployment? Also we use thin provisioning, if free space based off of the provision spaced?
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Question by:compdigit44
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LVL 124
ID: 41814829
Storage DRS obtains resource information, e.g. usage on all datastores in the cluster, and then generates recommendations.

It uses this information for placement on the datastores in the cluster.

It will do this automatically, if enabled, and set to automatic, if you have it set to manual, you will have to refresh and apply.

Not sure why you don' set it and forget it, and it will apply, at point of deployment, and clicking the button.
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by:compdigit44
ID: 41814985
Thank you for your feedback down the road I would like to move to more a more automated environment but we have to address so other areas first. So when a junior admin deploys a VM is storage DRS is enabled an setup to manual it will not prompt then with a list of recommendations. Also is free space based off of provisioned space
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LVL 124
ID: 41815029
Storage DRS obtains resource information Space Utilization % Before & After  (source) and (destination) provisioning.

two of the metrics used.
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by:compdigit44
ID: 41815036
but would it prompt the admin which datastore is "should" use during a VM deployment.  Also I must be missing something here but were are using thin provision on our VM's od storage drs does not take this into consideration?  I am carefully not to overcommit my datastore beyond 110%
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LVL 124
ID: 41815053
Storage DRS is thin provision aware.

In manual mode, it will recommend a virtual machine placement, based on metrics it's obtained, just like DRS for Host Clusters.

but after initial placement, refreshing may yield a new datastore to move to in the datastore cluster.
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by:compdigit44
ID: 41820929
Sorry for the delay in getting back to you and thank you for your input. What has been confused is that when someone deploys a VM from a template to a host that is part of the DRS cluster set to manual mode DRS never comes up with a dialog box of recommended host they should use.
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LVL 124
ID: 41821157
does it not ask for placement ?
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by:compdigit44
ID: 41822779
Correct right now when we deploy a VM to a host that is part of a DRS  cluster set to manual mode it does not present a list of recommended host. It will only present this screen after the host is powered on
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LVL 124
ID: 41822986
and when powered on, is that the Host or Datastore ?
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by:compdigit44
ID: 41824299
Since we only have DRS for the host it is on the host side only.. sorry  for the confusion
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LVL 124
ID: 41824301
so it will not do Storage DRS
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Author Comment

by:compdigit44
ID: 41825003
So in short Storage DRS will not give any recommendations when deploying a VM when set to manual mode correct?
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Accepted Solution

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Andrew Hancock (VMware vExpert / EE MVE^2) earned 2000 total points
ID: 41825014
It should do. Unless VMware have changed the specs again.

We would have to test, don't see the point of having it in manual mode!
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by:compdigit44
ID: 41825592
Thank you for your help as always.. It is always greatly appreciated.
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LVL 124
ID: 41825595
Not a problem, always glad to give you some practical advice, based on real world!
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