bashclub/proxmox-zfs-postinstall
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Round up / off zfs arc sizes

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thorstenspille 2021-04-28 23:29:35 +02:00
parent 55051975d6
commit 78d4560cce
1 changed files with 21 additions and 8 deletions
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29
proxmox-zfs-postinstall.sh
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@ -17,6 +17,16 @@ PVE_CONF_BACKUP_CRON_TIMER="3/15 * * * *"
###### SYSTEM INFO AND INTERACTIVE CONFIGURATION SECTION ######
ROUND_FACTOR=512
roundup(){
echo $(((($1 + $ROUND_FACTOR) / $ROUND_FACTOR) * $ROUND_FACTOR))
}
roundoff(){
echo $((($1 / $ROUND_FACTOR) * $ROUND_FACTOR))
}
#### L1ARC SIZE CONFIGURATION ####
# get total size of all zpools
@ -35,8 +45,8 @@ ARC_MIN_CUR_BYTES=$(cat /sys/module/zfs/parameters/zfs_arc_min)
ARC_MAX_CUR_BYTES=$(cat /sys/module/zfs/parameters/zfs_arc_max)
# calculate suggested l1arc sice
ZFS_ARC_MIN_BYTES=$(($ZPOOL_SIZE_SUM_BYTES / 4096))
ZFS_ARC_MAX_BYTES=$(($ZPOOL_SIZE_SUM_BYTES / 1024))
ZFS_ARC_MIN_MEGABYTES=$(roundoff $(($ZPOOL_SIZE_SUM_BYTES / 2048 / 1024 / 1024)))
ZFS_ARC_MAX_MEGABYTES=$(roundup $(($ZPOOL_SIZE_SUM_BYTES / 1024 / 1024 / 1024)))
echo -e "######## CONFIGURE ZFS L1ARC SIZE ########\n"
echo "System Summary:"
@ -63,8 +73,8 @@ fi
echo -e "Note: If your current values are 0, the calculated values above will apply."
echo ""
echo -e "The l1arc cache will be set relative to the size (sum) of your zpools by policy"
echo -e "zfs_arc_min:\t\t\t$(($ZFS_ARC_MIN_BYTES / 1024 / 1024))\tMB\t\t= 256 MB RAM per 1 TB ZFS storage"
echo -e "zfs_arc_max:\t\t\t$(($ZFS_ARC_MAX_BYTES / 1024 / 1024))\tMB\t\t= 1 GB RAM per 1 TB ZFS storage"
echo -e "zfs_arc_min:\t\t\t$(($ZFS_ARC_MIN_MEGABYTES))\tMB\t\t= 512 MB RAM per 1 TB ZFS storage (round off in 512 MB steps)"
echo -e "zfs_arc_max:\t\t\t$(($ZFS_ARC_MAX_MEGABYTES))\tMB\t\t= 1 GB RAM per 1 TB ZFS storage (round up in 512 MB steps)"
echo ""
RESULT=not_set
while [ "$(echo $RESULT | awk '{print tolower($0)}')" != "y" ] && [ "$(echo $RESULT | awk '{print tolower($0)}')" != "n" ] && [ "$(echo $RESULT | awk '{print tolower($0)}')" != "" ]; do
@ -73,15 +83,15 @@ while [ "$(echo $RESULT | awk '{print tolower($0)}')" != "y" ] && [ "$(echo $RES
RESULT=${REPLY}
done
if [[ "$(echo $RESULT | awk '{print tolower($0)}')" == "n" ]]; then
echo "Please type in the desired value in MB for 'zfs_arc_min' [$(($ZFS_ARC_MIN_BYTES / 1024 / 1024))]:"
echo "Please type in the desired value in MB for 'zfs_arc_min' [$(($ZFS_ARC_MIN_MEGABYTES))]:"
read
if [[ ${REPLY} -gt 0 ]]; then
ZFS_ARC_MIN_BYTES=$((${REPLY} * 1024 * 1024))
ZFS_ARC_MIN_MEGABYTES=$((${REPLY}))
fi
echo "Please type in the desired value in MB for 'zfs_arc_max' [$(($ZFS_ARC_MAX_BYTES / 1024 / 1024))]:"
echo "Please type in the desired value in MB for 'zfs_arc_max' [$(($ZFS_ARC_MAX_MEGABYTES))]:"
read
if [[ ${REPLY} -gt 0 ]]; then
ZFS_ARC_MAX_BYTES=$((${REPLY} * 1024 * 1024))
ZFS_ARC_MAX_MEGABYTES=$((${REPLY}))
fi
fi
@ -156,6 +166,9 @@ if [ $? -ne 0 ]; then
fi
echo "$PVE_CONF_BACKUP_CRON_TIMER root rsync -va --delete /etc /$PVE_CONF_BACKUP_TARGET > /$PVE_CONF_BACKUP_TARGET/pve-conf-backup.log" > /etc/cron.d/pve-conf-backup
ZFS_ARC_MIN_BYTES=$((ZFS_ARC_MIN_MEGABYTES * 1024 *1024))
ZFS_ARC_MAX_BYTES=$((ZFS_ARC_MAX_MEGABYTES * 1024 *1024))
echo "Adjusting ZFS level 1 arc"
echo $ZFS_ARC_MIN_BYTES > /sys/module/zfs/parameters/zfs_arc_min
echo $ZFS_ARC_MAX_BYTES > /sys/module/zfs/parameters/zfs_arc_max