Storage LUNs Size Sweet Spot

[RGS3]

In VI3 i would always present 600GB LUNS for VMFS datastores. This always seemed to be the magic number. That and only having about 20-30VM's per LUN. Is this still the case? I have a couple of large servers that I will be P2V'ing that required 400-500GB of storage space each and was wondering if I could safely present 1TB or more for a Datastore and still be considered "best practice"

FYI - If it matters I am using iSCSI.

[AntonVZhbankov]

Why not 555 or 666 GB?

There are no "best practice with numbers". The only best practice for choosing LUN size is:

1) leave 20% space free

2) give LUN capable to handle VM IO load. Doesn't matter, 2TB, 144GB or even multiple LUN 64TB datastore.

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MCSA, MCTS, VCP, VMware vExpert '2009

http://blog.vadmin.ru

[AndreTheGiant]

You can find different post about this "problem"...

It depends on:

• Storage best practice

• VM number, size and type of I/O

• Max LUN size (less than 2 TB - 512B)

• Max VM and I/O per LUN

Usually a value between 400-800GB could be reasonable.

See also:

Andre