Difference between revisions of "ZFS"

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* Integrated [[volume management]] – zpool (pooled storage)
 
* Integrated [[volume management]] – zpool (pooled storage)
 
* [[Copy on Write]] (CoW) <ref>https://en.wikipedia.org/wiki/Copy-on-write</ref>
 
* [[Copy on Write]] (CoW) <ref>https://en.wikipedia.org/wiki/Copy-on-write</ref>
−
* Compression
+
* Compression (<code>[[zfs set compression]]=off your_pool/filesystem (or just zfs set compression=off your_pool</code>, <code>[[zpool get all]]</code>)
−
* Snapshots and clones
+
* [[Snapshots]] and clones
 
* [[Deduplication]]<ref>https://wiki.ubuntu.com/Kernel/Reference/ZFS</ref>: <code>[[ZFS deduplication|zfs set dedup=on POOL_NAME/FS_NAME]]</code>
 
* [[Deduplication]]<ref>https://wiki.ubuntu.com/Kernel/Reference/ZFS</ref>: <code>[[ZFS deduplication|zfs set dedup=on POOL_NAME/FS_NAME]]</code>
 +
* [[Quotas]]: <code>[[zfs set quota]]</code>
 
* [[Solaris]]: Online shrink <code>zpool remove</code> in Solaris 11.4 released in August 2018 <ref>https://docs.oracle.com/cd/E37838_01/html/E60974/dmgmt.html#scrolltoc</ref>
 
* [[Solaris]]: Online shrink <code>zpool remove</code> in Solaris 11.4 released in August 2018 <ref>https://docs.oracle.com/cd/E37838_01/html/E60974/dmgmt.html#scrolltoc</ref>
 +
* [[Encryption]]:  integrated into OpenZFS 0.8.0 available for Debian and Ubuntu Linux distributions
  
 
Commands: <code>zfs</code>, <code>[[zpool]]</code>, <code>zdb</code>
 
Commands: <code>zfs</code>, <code>[[zpool]]</code>, <code>zdb</code>
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:: <code>[[zpool list]] -v</code>
 
:: <code>[[zpool list]] -v</code>
  
−
* <code>zfs mount -a</code>
+
* <code>[[zfs mount]] -a</code>
 
* <code>zfs umount</code>
 
* <code>zfs umount</code>
  
−
* Create a new pool ([[zpool create]])
+
* Create a new pool: <code>[[zpool create]]</code>
  
 
To Modify Disk identification to use  disk/by-id:
 
To Modify Disk identification to use  disk/by-id:
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=== Filesystems ===
 
=== Filesystems ===
−
* Create a new filesystem: <code>sudo zfs create DATA/datafs</code><ref>http://manpages.ubuntu.com/manpages/bionic/man8/zfs.8.html#subcommands</ref>
+
* Create a new filesystem: <code>sudo [[zfs create]] DATA/datafs</code><ref>http://manpages.ubuntu.com/manpages/bionic/man8/zfs.8.html#subcommands</ref>
 
* Destroy a zfs filesystem: <code>sudo zfs destroy DATA/datafs_TO_DESTROY</code> (Warning: no confirmation requested<ref>https://www.reddit.com/r/zfs/comments/7l4e4p/zfs_destroy_why_doesnt_it_have_any_confirmation/</ref>)
 
* Destroy a zfs filesystem: <code>sudo zfs destroy DATA/datafs_TO_DESTROY</code> (Warning: no confirmation requested<ref>https://www.reddit.com/r/zfs/comments/7l4e4p/zfs_destroy_why_doesnt_it_have_any_confirmation/</ref>)
 
**<code>sudo zfs destroy -r DATA/datafs_TO_DESTROY</code>  
 
**<code>sudo zfs destroy -r DATA/datafs_TO_DESTROY</code>  
−
* Set a quota to a filesystems: <code>zfs set quota=50G pool/home/bob</code><ref>https://docs.oracle.com/cd/E19253-01/819-5461/gazud/index.html</ref>
+
* Set a quota to a filesystems: <code>[[zfs set quota]]=50G pool/home/bob</code><ref>https://docs.oracle.com/cd/E19253-01/819-5461/gazud/index.html</ref>
 
* Check zfs service status: <code>systemctl status "zfs*" "zpool*"</code>
 
* Check zfs service status: <code>systemctl status "zfs*" "zpool*"</code>
 
* Display configuration information: <code>zdb -C</code>
 
* Display configuration information: <code>zdb -C</code>
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* List ZFS pools : <code>zpool list</code>
 
* List ZFS pools : <code>zpool list</code>
 
* List FS/Volumens/snapshots: <code>[[zfs list]]</code>
 
* List FS/Volumens/snapshots: <code>[[zfs list]]</code>
 +
* <code>[[zpool get all]]</code>
 
* <code>[[zfs get all]]</code>
 
* <code>[[zfs get all]]</code>
 
::<code>zfs get all | grep mountpoint</code>
 
::<code>zfs get all | grep mountpoint</code>
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# Follow Ubuntu Tutorial about Setup a ZFS storage pool: https://tutorials.ubuntu.com/tutorial/setup-zfs-storage-pool#0
 
# Follow Ubuntu Tutorial about Setup a ZFS storage pool: https://tutorials.ubuntu.com/tutorial/setup-zfs-storage-pool#0
 
# Create you first ZFS pool: <code>zpool create</code>
 
# Create you first ZFS pool: <code>zpool create</code>
 +
 +
=== Medium ===
 +
# Read about [[ZFS]] <code>rm</code> "expensive" operations: https://serverfault.com/a/801080, even more so if [[deduplication]] is enabled.
 +
 +
== Related terms ==
 +
* <code>[[z_fr_iss]]</code>
 +
* [[snapshotter]]
  
 
== See also ==
 
== See also ==

Latest revision as of 10:57, 6 September 2023

ZFS (2006) is a combined file system and volume manager included in Solaris 10 update 2 (06/2006) and Ubuntu 16.04 LTS onwards. ZFS support advances features such as

Commands: zfs, zpool, zdb


  • Ubuntu Installation: sudo apt install zfsutils-linux


Configuration files[edit]

  • /etc/default/zfs

Commands[edit]

  • List your block/disk devices: lsblk or lsblk -f or fdisk -l
zpool list -v

To Modify Disk identification to use disk/by-id:

  • zpool export DATA
  • zpool import -d /dev/disk/by-id DATA
  • Verify: zdb -C

Pools[edit]

Filesystems[edit]

  • Create a new filesystem: sudo zfs create DATA/datafs[4]
  • Destroy a zfs filesystem: sudo zfs destroy DATA/datafs_TO_DESTROY (Warning: no confirmation requested[5])
    • sudo zfs destroy -r DATA/datafs_TO_DESTROY
  • Set a quota to a filesystems: zfs set quota=50G pool/home/bob[6]
  • Check zfs service status: systemctl status "zfs*" "zpool*"
  • Display configuration information: zdb -C

List information[edit]

zfs get all | grep mountpoint
zfs get all | grep dedup

Advanced[edit]

Activities[edit]

  1. Read selecting dev names when creating a pool before you create your first ZFS pool: https://github.com/zfsonlinux/zfs/wiki/FAQ#selecting-dev-names-when-creating-a-pool and https://wiki.archlinux.org/index.php/Persistent_block_device_naming
  2. Read ArchLinux documentation about ZFS: https://wiki.archlinux.org/index.php/ZFS#Creating_a_storage_pool
  3. Follow Ubuntu Tutorial about Setup a ZFS storage pool: https://tutorials.ubuntu.com/tutorial/setup-zfs-storage-pool#0
  4. Create you first ZFS pool: zpool create

Medium[edit]

  1. Read about ZFS rm "expensive" operations: https://serverfault.com/a/801080, even more so if deduplication is enabled.

Related terms[edit]

See also[edit]


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Original Source: https://en.wikiversity.org/wiki/Linux_Administration/Devices_and_Filesystems/ZFS

  1. ↑ https://en.wikipedia.org/wiki/Copy-on-write
  2. ↑ https://wiki.ubuntu.com/Kernel/Reference/ZFS
  3. ↑ https://docs.oracle.com/cd/E37838_01/html/E60974/dmgmt.html#scrolltoc
  4. ↑ http://manpages.ubuntu.com/manpages/bionic/man8/zfs.8.html#subcommands
  5. ↑ https://www.reddit.com/r/zfs/comments/7l4e4p/zfs_destroy_why_doesnt_it_have_any_confirmation/
  6. ↑ https://docs.oracle.com/cd/E19253-01/819-5461/gazud/index.html
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