Storage for virtual environments Definitions

  • I

    I/O blender effect

    The I/O blender effect is a phenomenon in virtualized environments that degrades storage performance.  The I/O blender effect occurs when multiple virtual machines (VMs) all send their input/output (I/O) streams to a hypervisor for processing.

  • I/O contention (input/output contention)

    I/O contention (input/output contention), occurs when virtual machines compete for I/O resources because there is a limited storage bandwidth.

  • I/O virtualization (IOV)

    I/O virtualization (IOV), or input/output virtualization, is technology that uses software to abstract upper-layer protocols from physical connections or physical transports.

  • S

    storage hypervisor

    Storage hypervisors make more efficient use of storage resources in a virtual environment.

  • V

    virtual provisioning

    Virtual provisioning is a term used by vendors, such as EMC, to describe a process of efficiently provisioning space in storage area networks (SAN). (Continued...)

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