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Guv
Enthusiast
Enthusiast

Datastore design on new Lun setup

We use Vsphere 4 and have many datastores setup for our VM's. We have now purchased and setup a new storage system. We have setup or worked out the LUNS we are going to have on the new system, but now have to decide on the number of datatstores we are going to have on each LUN. The LUN design is as follows:

1TB (RAID 10)

1TB (RAID 10)

1,5TB (RAID 10)

2,5TB (RAID 5)

5 TB (Raid 5)

My question is what is the best datastore design for the amount of datastores on each LUN. Is is best to designate all of the LUN to one datastores and setup smaller datastores on each LUN. Which would give best VM performance or would this depend on other parameters. Such as create smaller datastores and then put high performance VM's on the separate VM's instead of all in one datastore.

The RAID 10 datastores we will put all our databases disks such as sql/oracle dbases and on the RAID 5 luns would put like other application servers and also the OS (system) disk of the VM's. So would this matter in the decision of how many datastores on RAID 10 and RAID 5 LUNS. As databases are high performance maybe create more smaller datastores on RAID 10, and as system disks are less resource intensive maybe create one large datastore on the RAID 5 Lun.

Any advise on this please

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AntonVZhbankov
Immortal
Immortal

>My question is what is the best datastore design for the amount of datastores on each LUN.

1 LUN = 1 Datastore.

Single Datastore can be spanned over several LUNs, but single LUN must be only in one datastore.

>2,5TB (RAID 5)

>5 TB (Raid 5)

You won't be able to use them. Maximum supported LUN size = 2TB minus 512B


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AndreTheGiant
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See also:

Andre

Andre | http://about.me/amauro | http://vinfrastructure.it/ | @Andrea_Mauro
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Guv
Enthusiast
Enthusiast

sorry instead of LUNS i should say Array, I have 5 Arrays, and have to decide on the amount of LUNS (or datastores) on each array

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