My question centers around how much space to leave on a datastore. I am running ESXi 5.1. I have one datastore that has 832GB of space running on a RAID 10 volume. That volume is created using 6 300GB 15k drives. It is the only datastore available. On this host I hope to have four VMs running server 2012. One VM will be a SQL/Web server using approximately 400GB. Two VMs will be application servers using 100GB each. All three of these servers combine to make one running application. The last fourth server is a Test server for the application using approximately 200GB. That is 800GB of the datastore leaving only 32GB left.
I don't plan to use the Snap shot feature or VMotion and the servers will be backed up to another location using Trilead. I chose the RAID 10 setup for the read / write increase but could get another 500GB using RAID 5 losing the boost in write speed. I would really appreciate the opinions on this. As an option I could take the Test server off this host and move it into another host freeing up 200GB but want to hear what people think first.
Thanks You, Gary