Crucial Exams

CompTIA Linux+ XK0-006 (V8) Practice Question

A systems engineer creates a new guest on a KVM host. The guest's virtual disk is presented as an emulated IDE device, and benchmark results inside the VM show sustained write throughput that is far lower than other VMs that use the same back-end storage. The engineer wants to improve disk I/O performance without replacing the underlying storage hardware or moving the VM to a different host.

Which change is MOST likely to reduce the disk latency and increase throughput for this virtual machine?

  • Create a snapshot of the VM and then revert to it to eliminate disk fragmentation

  • Convert the existing disk image from raw to qcow2 to enable copy-on-write allocation

  • Enable CPU passthrough mode so the guest uses the host's full instruction set

  • Replace the IDE disk with a VirtIO block device and load the appropriate paravirtualized driver inside the guest

CompTIA Linux+ XK0-006 (V8)
System Management
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