bcache
#Check cache block of devices
#Physical disk
root@NAS:~# cat /sys/block/sda/queue/physical_block_size
512
#SSD disk
root@NAS:~# cat /sys/block/sdb/queue/physical_block_size
4096
#Mechanical drive
make-bcache -B --block 4096 /dev/sdb1
#SSD cache
make-bcache -C --bucket 512 /dev/sda1
#Get the uuid of the cache device
bcache-super-show /dev/sda1 | grep cset
cset.uuid f0e01318-f4fd-4fab-abbb-d76d870503ec
#Register cache device
echo f0e01318-f4fd-4fab-abbb-d76d870503ec > /sys/block/bcache0/bcache/attach
#Create the btrfs filesystem.
mkfs.btrfs /dev/bcache0
#mount the filesystem
mount /dev/bcache0 /mnt
sudo mkdir -p /mnt/opennebula/{images,system,files}
bcache.txt · Last modified: by etfiat