In part I of this series we looked at basic Hard Disk Drive (HDD) characteristics and wrapped up with the question of what is the best type of HDD to use?
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VMware buying Virsto is a big move and after considerable discussion a logical step for VMware in many technical areas as well. We previously mentioned that Virsto would add to VMware’s existing in Software Defined Data Center (SDDC), but there is more to this than just SDDC, which I believe is the end goal. Getting there absolutely requires a storage abstraction layer. So what does VMware gain other than SDDC with Virsto.
Unless you are one of the few who have gone all solid-state devices (SSDs) for your virtual environment, hard disk drives (HHDs) still have a role. That role might be for primary storage of your VMs and/or their data, or as a destination target for backups, snapshots, archiving or as a work and scratch area. Or perhaps you have some HDDs as part of a virtual storage appliance (VSA), storage virtualization, virtual storage or storage hypervisor configuration. Even if you have gone all SSD for your primary storage, you might be using disk as a target for backups complimenting or replacing tape and clouds. On the other hand, maybe you have a mix of HDD and SSD for production, what are you doing with your test, development or lab systems, both at work and at home.
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Depending upon what your or somebody else’s definition of a storage hypervisor is, you may or may not be using one or realize it.
If your view of a storage hypervisor is a storage IO optimization technology to address performance and other issues with virtual machines (VMs) and their hypervisors, such as Virsto or ScaleIO along with others, you might be calling those storage hypervisors as opposed to middleware, management tools, drivers, plug-in, shims, accelerators, or optimizers.