the hypervisor and its drive system

Dear all,

I would like to do a virtual server with two small VMs. (in time real, there will be two virtual server with a virtual computer, and the two of them will be the other backup system, so I have to plan for the worst case, when two virtual machines must run on the same hardware). It would be so complicated, because both vm-s are: a sql express 2012 on a win 7 pro Server (or server win 2012 depend on budget) and special software on a windows xp (or Windows 7). Software restaurant now running on a windows xp with dedicated hardware, so I measured a large number of parameters, including the use of the CPU, utilization of the disk, net use. As for the sql express, it will be a whole new thing, so I can't do action, I can only count the requirements of sellers, but I think that his charge will be relatively low (it's a small business restaurant reservation system database). I read a lot of books and articles, how to calculate the virtual processor, Rams, etc., but all these on the high-end systems. Disaster, two virtual machines will run the same machine, but also at the same time. Data grow is insignificant for the two VM. because of the budget we cannot FCoE and ISCSI as a system disk, so I can only use local disks. And this disk system is confused me.

In my head, it should be like this for the best effective average budget: a raid1 on top of hardware in the server raid card and all the staff installed on this raid1 (the hypervisor itself and two virtual machines). I'm not sure the system and disk partitioning. Can the hypervisor and guests on the same partition (and drive at all)? Or should I make 3 separate for them? I would avoid using more than two disks, a raid1 with two disk might work like a charm.

Any suggestion is welcome.

Thank you very much

CHR

ESXi automatically partition the drive of installation/volume and create system as well as the partition (data store) VMFS partitions, so it's no problem at all. However, even with a small budget, you must make sure that the RAID controller takes in charge a battery/flash backed write cache option to operate in writeback mode. Without the write cache, RAID controllers will work in writing continuous mode, i.e. in a way slower than the writeback (> 10 x).

André

Tags: VMware

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