Hello, everybody:
I'm looking for feedback on a purpose HA solution for a ERP system that run on SQL Server 2012.
Server1 - Windows 2012 R2 Hyper-V with SQL Server 2014 with SSD RAID-5 clustered as a fail-over with Server2
Server2 - Windows 2012 R2 Hyper-V with SQL Server 2014 with SSD RAID-5 clustered as a fail-over with Server1
Server3 - Windows 2012 R2 Hyper-V running ERP application Hyper-V replica with Server 4
Server4 - Windows 2012 R2 Hyper-V running ERP application
Questions: Does it make sense to have 4 host hyper-v machine in this configuration, won't this require a total of 6 Windows 2012R2 licenses? I prefer using Hyper-V since you can move the machines between each other for maintenance.
Also, with SQL Server it was recommended not to use a replica since it would defeat the SQL server clustering built-in. Can you add a RAID-5 on-board controller to a shared disk cluster? My other options would be iSCSI, SAN, or NAS.
Thanks!