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Extend existing datastores vs Creating new datastores

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Hi all,

 

I did some searching and didn't find anything that really pertains to a question I have about datastores in our production system.

Some background on the system first.  We have roughly 100 datastores formatted in VMFS5.  There are about 40 hosts and they are running 5.5 update 2e (soon pushing to vSphere 6) under Enterprise licensing.   We are looking at doing one of the following two things:

 

  1. Extending the size of the current datastores.
  2. Presenting new LUNs and creating datastores that are larger in size, then removing the old ones.

 

I was curious about the best practice when dealing with a situation like this.  Are there any negative effects associated with extending the existing datastores to a larger size?  Any gotchas or warnings? We would prefer to just extend the existing ones since it is far quicker and easier but I definitely will enforce what is best over what is easiest.

 

Any recommendations or insight would be appreciated!


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