dvanders

#!/bin/sh

# prefer cfq (el7), then mq-deadline (el8), then do nothing

if grep -q cfq /sys/block/sd*/queue/scheduler; then
  # tune SSDs to use noop scheduler and spinning disks to use cfq
  for DISK in /sys/block/sd*; do grep -q 0 ${DISK}/queue/rotational && echo noop > ${DISK}/queue/scheduler; done
  for DISK in /sys/block/sd*; do grep -q 1 ${DISK}/queue/rotational && echo cfq > ${DISK}/queue/scheduler; done

  # tune cfq not to penalize writes when reading heavily