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Aprius solutions maximize application performance and minimize infrastructure costs in a data center by addressing network and storage I/O bottlenecks. The company offers a simple approach to provisioning and managing I/O resources by applying the principles of virtualization to server I/O including disk and flash storage, network and SAN interfaces. For additional information, please contact us at [email protected] or visit

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The 4 fundamentals of i o virtualization iov l.jpg

The 4 Fundamentals of I/O Virtualization (IOV)


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Server virtualization has led to the creation of other virtual resource types, including:

  • | CPU | Memory | Storage | I/O | Network |

I/O Virtualization (IOV)

The logical abstraction of server I/O (including network and SAN connections, direct-attached storage, coprocessor offload, video graphics, etc.) into many virtual resources, allowing for the balanced matching of I/O to physical and virtual servers.

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4 Fundamentals of IOV virtual resource types, including:

Maintain the Option of Choice

Be Ready to Scale

Make IOV an Extension of your Existing Infrastructure

Implement a New Data Center Mantra

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1. virtual resource types, including:Maintain the Option of Choice

  • Common method: assign I/O to a server by installing a card (typically via a PCI Express (PCIe) I/O slot)

    • Limits end-user I/O choice /application flexibility; increases overall app cost

  • An IOV system must present any I/O type to any server (physical or virtual)

    • Open, standards-based; flexibility controls quality, performance and operational costs

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2 virtual resource types, including:. Be Ready to Scale

  • Depending on number of servers (i.e. high-density blade or flexible rack-mount), IOV systems and pools must scale

    • I/O performance: coupled to servers and closely managed bandwidth, latency and policy requirements of the application; or

    • Share I/O resource pools across many servers using certain level of subscription.

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3 virtual resource types, including:. Make IOV an Extension of your Existing Infrastructure

  • IOV does not replace network access switches or change the configuration of network or SAN

    • IOV should accommodate direct server or network attachment modes:

    • Server-attached: ‘on-ramp’ to existing network and storage infrastructure

    • Network-attached: standards-based protocols provide I/O access over a common network and storage infrastructure



  • Datacenter Fabric

  • (CEE)


I/O Resource Pool




Flash SSD

Utility I/O


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  • 4 virtual resource types, including:. Implement a New Data Center Mantra


  • I/O must be actively managed by new rules, monitored for status and performance and provisioned on-demand.

  • IOV systems should also support prior management practices and processes.

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  • Learn about Aprius’ Technology Evaluation Platform

  • Aprius’ Interop Press Release

  • Aprius white paper “Four Fundamentals of I/O Virtualization”

  • Aprius on Twitter: @CraigAprius