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| = ZFS On Debian 9 = * add "contrib" to strech sources in ''/etc/apt/sources.list'', then: {{{ aptitude install linux-headers-$(uname -r) zfs-dkms zfsutils-linux libkmod-dev modprobe zfs aptitude install gdisk sgdisk --zap-all /dev/disk/by-id/... ## remove existing partition table sgdisk -a1 -n2:34:2047 -t2:EF02 /dev/disk/by-id/ ## create GPT entries ## never use /dev/sd* for pool creation use instead /dev/disk/by-id/* zpool create -o ashift=12 pool1 mirror -R /mnt/zfs /dev/disk/by-id/... /dev/disk/by-id/... zpool status zpool list zfs set compression=lz4 pool1 ## enable compression for this pool zfs get compressratio pool1 zfs create pool1/dataset1 ## create new filesystem in pool which is mounted on the fly }}} * The use of ashift=12 is recommended here because many drives today have 4KiB (or larger) physical sectors, even though they present 512B logical sectors. Also, a future replacement drive may have 4KiB physical sectors (in which case ashift=12 is desirable) or 4KiB logical sectors (in which case ashift=12 is required). * "mirror" is for raid1 * -R /mnt/zfs will automount it there, control via /etc/default/zfs * qemu AIO should be used to maximize IOPS when using files for guest storage. * https://wiki.ubuntuusers.de/ZFS_on_Linux/ = Using Snapshots = * use often and regulary {{{ zfs set snapdir=visible pool1/dataset1 zfs snap pool1/dataset1@first-snapshot ## create first snapshot zfs snap pool1/dataset1@second-snapshot ## create secodn snapshot zfs rollback pool1/dataset1@first-snapshot ## rollback first snapshot zfs destroy pool1/dataset1@second-snapshot ## delete second snapshot zfs clone pool1/dataset1@first-snapshot pool1/firstclone ## create clone }}} * automatic snapshots via cronjob {{{ aptitude install zfs-auto-snapshot zfs-auto-snapshot --quiet --syslog --label=daily --keep=31 pool1/dataset1 ## make daily snapshots, keep for 31 days zfs-auto-snapshot --quiet --syslog --label=monthly --keep=12 pool1/dataset1 }}} = Transfer ZFS Snapshot Over Network = {{{ zfs send mypool/testarea@first-snapshot | gzip > /mnt/backup/snapshot.img.gz ## save snapshot as image zfs send mypool/testarea@first-snapshot | ssh host "zfs receive remotepool/blabla" ## send snaphsot to remote host zfs send -p -R ... ## transmit settings like compression zfs send mypool/testarea@first-snapshot mypool/testarea@second-snapshot ... ## send just incremental changes ## speedup receive zfs send -i mypool/testarea@first-snapshotman s | ssh host "mbuffer -s 128k -m 1G | zfs receive -F tank/pool ## speedup send & receive: # Start the receiver first. This listens on port 9090, has a 1GB buffer, and uses 128kb chunks (same as zfs): mbuffer -s 128k -m 1G -I 9090 | zfs receive data/filesystem # Now we send the data, also sending it through mbuffer: zfs send -i data/filesystem@1 data/filesystem@2 | mbuffer -s 128k -m 1G -O 10.0.0.1:9090 }}} |
- Änderungen von "ZFS on Debian"
