Set the disk scheduler

The disk scheduler is responsible for ordering the I/O requests submitted to a storage device. You can configure the scheduler in several different ways:

  • Set the scheduler using TuneD.
  • Set the scheduler using udev.
  • Temporarily change the scheduler on a running system.
Note
In Red Hat Enterprise Linux, block devices support only multi-queue scheduling. This enables the block layer performance to scale well with fast solid-state drives (SSDs) and multi-core systems.