RHEL7: Large block read performance issue with XFS+LVM with Intel NVMe

Solution Verified - Updated -

Issue

  • Large block reads from a XFS file system backed by a LVM Logical Volume on a Intel NVMe device are under performing.
  • This behavior is not observed on a XFS file system directly on the NVMe device.
  • Reads from a EXT4 file system on a Logical Volume do not exhibit this behavior.

Environment

  • Red Hat Enterprise Linux 7
  • XFS on a LVM Logical Volume
  • NVMe storage

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