EMC VFCache (nÃ©e Project Lightning) is a fairly simple offering: A server-based PCIe flash card that acts as a read cache with no integration with storage arrays or hypervisors. But EMC’s entrance into the host-based flash storage market is a powerful demonstration of the wave of disruption caused by flash-based storage and high-performance computing.
Moving cold virtual machine images from system to system, or even across great distances, is one of the main selling points of server virtualization. But it becomes much more difficult to manage movement of virtual machines that are still running, especially outside cluster or across WAN links. When talking about virtual machine mobility, it is important to consider what is being moved, the state it is in, and where it is going.
I’ve been hearing little teasers from Frank Denneman (One of the Authors) about this book since way back in the summer when it was first announced. Now I finally have my hands on a copy.
One of the most interesting areas covered at VMworld 2010 was the new storage features in vSphere 4.1. There are two main features I want to cover in depth as I feel they are important indicators of the direction that storage for VMware is heading: Storage I/O Control (SIOC) and vStorage API for Array Integration (VAAI).
IO DRS provides performance Isolation to VMs in shared storage environments, and it might not be as far away as first thought.