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post_upgrade() {
	# Upgrading from release <1.28.0 to release >=1.28.0
	if [[ "$(vercmp "$2" "1.28.0")" -lt "0" ]] && [[ "$(vercmp "$1" "1.28.0")" -gt "-1" ]]; then
		echo ':: Warning: release 1.28.0 has changed on-disk format for inverted index inside'
		echo ':: indexdb folder. It will be converted in background on the first run.'
		echo ':: VictoriaMetrics performance can degrade during this conversion.'
		echo ':: The conversion is complete after two lines starting with finished round 2 of'
		echo ':: background conversion appear in logs. It is impossible downgrading to older'
		echo ':: releases after starting release 1.28.0 or later.'
	fi
}

post_install() {
	echo ':: You can adjust settings at /etc/default/victoriametrics'
}