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tfiskgul/background.slice

Created May 25, 2018 13:52
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systemd background io slice for defragmentation, scrub, deduplication etc
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background.slice
[Unit]
Description=Background slice with much lower system (particularly IO) impact
Before=slices.target
[Slice]
# CPU
# cgroup v1. The allowed range is 2 to 262144. Defaults to 1024.
CPUShares=10
# IO, cgroup v1.
BlockIOAccounting=yes
BlockIOWeight=10
# FIXME: Make this dynamic with a generator
BlockIOReadBandwidth=/dev/sda 2M
BlockIOReadBandwidth=/dev/sdb 2M
BlockIOReadBandwidth=/dev/sdc 2M
# These limits only apply to synchronous writes (O_SYNC)
BlockIOWriteBandwidth=/dev/sda 2M
BlockIOWriteBandwidth=/dev/sdb 2M
BlockIOWriteBandwidth=/dev/sdc 2M
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