I'm in the step of combining 2 older servers into a newly setup ESXi 4 Server.
Hosted VMs will be:
1 Linux System (Debian) for Webserver, Mailserver, MySQL, Bind.
1 Windows XP or 7 solely for a proprietary database system.
At first I thought about combining 4x 10000 rpm SATA drives into a RAID 10 and run ESXi + VMs from that RAID.
But probably using a dedicated RAID 1 for each VM might give a more reliable performance for each VM. The speed advantage of the RAID 10, mainly high sustained data transfer speed, might not bring much advantage, as the type of services I'll run on either VM IMHO benefit more from fast access times for reading/writing small files, than from high sustained data transfer speed for reading/writing big files.
What is your opinion?
Furthermore where would you install the ESXi hypervisor? Options would be the RAID 10, one of the two RAID 1 or onto a DOM/USB stick. Performance-wise it seems to make no difference, as the Hypervisor, once booted, seems to run in RAM without generating much disk access, right? So it is probably more a question of freedom in flexibility to change the RAID configurations.
Thanks for any comments.
Pete