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wido/ceph-udev-disk-scheduler.rules

Last active July 13, 2023 14:17
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ceph-udev-disk-scheduler.rules
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ceph-udev-disk-scheduler.rules
# udev rule to set disk schedulers for Ceph
# For spinning disks we want the CFQ scheduler so that we can set
# priorities on client and recovery I/O threads
#
# Author: Wido den Hollander <wido@42on.com>
# Date: July 2015
# Use deadline for SSDs
ACTION=="add|change", KERNEL=="sd[a-z]*", ATTR{queue/rotational}=="0", ATTR{queue/scheduler}="deadline"
# Use CFQ for HDDs
ACTION=="add|change", KERNEL=="sd[a-z]*", ATTR{queue/rotational}=="1", ATTR{queue/scheduler}="cfq"
@jnemeiksis
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Hi, deadline is still using for SSDs?

@wido
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wido commented Feb 2, 2021

Hi, deadline is still using for SSDs?

From what I know noop is the best and newer kernels >5.3 use something different.

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