New month, new drama in the virtualization world. After the hot debate about the VMware ESX memory overcommit capabilities that involved Citrix, Microsoft and obviously VMware, this time is the turn of the virtual machine migration capabilities included in ESX and upcoming Hyper-V.
Once again Mike DiPetrillo, Specialist System Engineer of Industry Research and Competitive Analysis department at VMware, ignited the fire comparing ESX VMotion with Hyper-V Quick Migration, stating that the latter has an excessive gap (8 seconds at the best) in resuming the virtual machines and causes severe faults in networked applications like database servers or file servers (technical details are covered here and here).
This is just a reprise of an original post appeared on DiPetrillo personal blog where he questioned the reliability of Quick Migration and XenMotion technologies.