How to balance Datastore over Allocation

Now days we observed Datastores over allocation for 80 % Datastores we have in our environment.

Need to understand if thin provisioning is the only key point to be resolved  

Can we balance All the data store in a way so that such over allocation can be rectified

Would be good if convert all thin to thick vmdk ?

What could be the best config to get this over allocation resolved like we should use some datastore for thin provisioning not all? Or if any other way we can get this fixed ?
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patronAsked:
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Scott GorcesterCTOCommented:
Thin provisioning is a fine technology as long as you are careful to not over provision. In other words if you have 100GB's of physical disk and 200GB's of thin provisioned virtual disk you can only put 100GB of data on this storage (or just under 100GB).  If you are at 80% or more of your current physical capacity then you need to be very careful to not get to 100%. This means you either need to maintain the current data size and not all it to get to 100%, or add some addition drive capacity. Its fine to run at 80% as long as you keep it under 100%. If you get to 100% of your actual storage space it is common for your storage services to stop working so this can be critical. Its also important to know that its not always as simple as just deleting some data, you may need to reclaim space on the SAN.

Scott
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Storage DRS, and use Datastore Clusters,

Storage DRS and Datastore Clusters, are to storage, what DRS is to Hosts and Clusters.

see here

http://www.yellow-bricks.com/2012/05/22/an-introduction-to-storage-drs/
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patronAuthor Commented:
Thanks, I need this to balance the Overallocation..can we set any limit or if only few datastore can be used always for thin provisioning..to overcome this overallocation ?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Use Storage DRS.
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patronAuthor Commented:
Thanks
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