blkdiscard /dev/vdb
blkdiscard /dev/vdc
 
sgdisk --zap-all /dev/vdb
sgdisk --zap-all /dev/vdc
 
ls -lart /dev/disk/by-path
 
zpool create \
    -o ashift=12 \
    -O acltype=posixacl -O canmount=off -O compression=lz4 \
    -O xattr=sa -f storage mirror \
     /dev/disk/by-path/pci-0000:2c:00.0-ata-1 \
    /dev/disk/by-path/pci-0000:2c:00.0-ata-2 
 
zpool add storage cache /dev/disk/by-path/pci-0000:26:00.0-ata-2
zpool add storage log /dev/disk/by-path/pci-0000:2c:00.0-ata-5
zfs set atime=off storage
zfs set recordsize=1M storage
zfs set redundant_metadata=most storage
zpool set autotrim=on storage
zfs set sync=standard storage 
zfs set mountpoint=none storage
zfs create storage/files
zfs set mountpoint=/files storage/files
zfs create storage/backup
zfs set mountpoint=/backup storage/backup
zfs set dedup=verify storage/backup
 
#IMPORTANT MEMORY SETTINGS
cat >> /etc/modprobe.d/zfs.conf << EOF
options zfs zfs_arc_min=10737418239
options zfs zfs_arc_max=10737418240
EOF
 
update-initramfs -u
 
echo "$[10 * 1024*1024*1024 - 1]" >/sys/module/zfs/parameters/zfs_arc_min
echo "$[10 * 1024*1024*1024]" >/sys/module/zfs/parameters/zfs_arc_max
 
 
 
 
#just INFOS: 
 
#recordsize 16k – 32k : database, IoT, logging, monitoring, webserver
#recordsize 64k – 256k : VMs, normal files, network shares, operating systems
#recordsize 256k + :  pictures, movies, music, backups, isos, images, big data
#but a recommend standard is recordsize=1M
#optimal for proxmox: 128k
 
#enable dedub verify check the blocks more intense.
#zfs set dedup=verify storage/backup
#zfs set dedup=on storage/backup
 
#create a volume 
#zfs create -s -V 10G storage/vol1
 
#install iscsi server and give the volume to another server as local storage over ethernet.
#apt-get install tgt
 
#cat >> /etc/tgt/conf.d/target01.conf << EOF
#<target iqn.2021-5.servername:vol1>
#backing-store /dev/zvol/storage/vol1
#</target>
#EOF
 
#systemctl reload tgt
 
#diagnostics
#zpool status
#zpool iostat -v
#arcstat
#zfs list storage/backup
#zdb -b storage
 
#activate deduplication not under 1,5% rate
#zfs get compressratio,refcompressratio
 
#zfs get all storage/backup
 
#arc_summary -s zil
#arc_summary -s l2arc
#arc_summary -s archits
#arc_summary -s arc