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It may be time to create a position that that crosses the functional boundaries of applications, servers, hypervisors, and storage to take a holistic view of performance.
Consider booting from SSD to bring servers back online quickly and using PCIe SSD with caching software to accelerate operating system and application data functions.
Leverage a virtualized storage system’s granular understanding of block of data to automatically move data segments to faster or slower storage tiers, based on access patterns.
All that's needed is to address some of the core storage shortcomings of the hypervisor, like providing solid performance while using thin provisioning, snapshots, and clones.
Vertically integrated storage systems have some benefits, but too many vendors make claims about vertical integration that aren't backed up by their products.
IT managers are increasingly looking at high-capacity storage systems to help with server virtualization infrastructures, Big Data, and online applications.
Storage virtualization systems let you use any vendor's hardware and bring it under a single storage services umbrella. It's not nirvana yet--but we're making progress.