The Trouble with Clouds Is the Darn Hypervisor

Parallels’ CTO of server virtualization James Bottomley claims there’s an inherent tenancy problem with PaaS and SaaS clouds because most applications are designed for single occupancy.
And they’re designed for single occupancy mostly because it’s easier to write them that way, ignoring the fact that their data can leak or they can hog resources – or maybe not get enough resources – if they’re deployed in a multitenant cloud.
He figures the software industry will pretty much treat the problem the way it did the need for high availability some years back and stick its head in the sand. Single-occupancy applications won’t get rewritten to oblige multitenant clouds. ISVs are unwilling to make the investment.

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