ZFS - Revision history

Leo at 16:23, 8 August 2023

2023-08-08T16:23:26Z

@@ Line 1,106: / Line 1,106: @@
 *http://www.freenas.org/blog/zfs-zil-and-slog-demystified/
 *https://www.ixsystems.com/blog/o-slog-not-slog-best-configure-zfs-intent-log/
 ==See Also==

2023-02-10T23:13:21Z

Install ZFS on CentOS

← Older revision		Revision as of 23:13, 10 February 2023
Line 105:		Line 105:
	\| lang = terminal		\| lang = terminal
	}}		}}
	If you need to rebuild the zfs module for whatever reason, use the <code>dkms build zfs/zfs-version</code> command~~. Eg:~~ <code>dkms build zfs/2.0.5</code> If you need to target a specific kernel version, you can also specify the kernel like so: <code>dkms build -m zfs -v 0.6.5 -k 4.2.5-300.fc23.x86_64 && dkms install -m zfs</code>		Installing the zfs package should also automatically build ZFS using DKMS for your kernel. Run <code>dkms status</code> to see whether zfs is installed.

			{{Highlight
			\| code = # dkms status
			zfs/2.1.9, 4.18.0-425.10.1.el8_7.x86_64, x86_64: installed
			\| lang = terminal
			}}

			If you need to rebuild the zfs module for whatever reason, use the <code>dkms build zfs/zfs-$version</code> command (such as <code>dkms build zfs/2.0.5</code>). If you need to target a specific kernel version, you can also specify the kernel using the <code>-k</code> flag like so: <code>dkms build -m zfs -v 0.6.5 -k 4.2.5-300.fc23.x86_64</code>. After building the dkms module, you can install it by running: <code>dkms install -m zfs</code>

	====ArchLinux====		====ArchLinux====

2023-02-10T23:08:27Z

← Older revision		Revision as of 23:08, 10 February 2023
Line 95:		Line 95:

	====Install ZFS on CentOS====		====Install ZFS on CentOS====
	Refer to the documentation at: https://openzfs.github.io/openzfs-docs/Getting%20Started/RHEL%~~20and%20CentOS~~.html		Refer to the documentation at: https://openzfs.github.io/openzfs-docs/Getting%20Started/RHEL-based%20distro/index.html

	In summary, enable the EPEL and ZFS repositories by installing the <code>epel-release</code> and the <code>zfs-release</code> packages. Proceed to install the <code>zfs</code> package which will automatically pull in the required dependencies and trigger the kernel module build using dkms.		In summary, enable the EPEL and ZFS repositories by installing the <code>epel-release</code> and the <code>zfs-release</code> packages. Proceed to install the <code>zfs</code> package which will automatically pull in the required dependencies and trigger the kernel module build using dkms.
	{{Highlight		{{Highlight
	\| code = # ~~yum~~ install https://zfsonlinux.org/epel/zfs-release~~.el8_3~~.noarch.rpm		\| code = # dnf install https://zfsonlinux.org/epel/zfs-release-2-2$(rpm --eval "%{dist}").noarch.rpm
	# ~~yum~~ install epel-release		# dnf install -y epel-release
	# ~~yum~~ install kernel-devel zfs		# dnf install -y kernel-devel
			# dnf install -y zfs
	\| lang = terminal		\| lang = terminal
	}}		}}

2022-03-14T03:54:41Z

arc summary

← Older revision		Revision as of 03:54, 14 March 2022
Line 81:		Line 81:
	\|{{highlight\|lang=terminal\|code=		\|{{highlight\|lang=terminal\|code=
	# zpool import -a		# zpool import -a
			}}
			\|-
			\|Show ARC summary
			\|{{highlight\|lang=terminal\|code=
			# arc_summary -s arc
	}}		}}
	\|}		\|}
Line 949:		Line 954:
	}}		}}

	You may check the current ARC usage by checking {{code\|cat /proc/spl/kstat/zfs/arcstats}} or use the {{code\|arcstat.py}} script that's part of the {{code\|zfs}} package.		or change the value on the fly:
			{{highlight\|lang=terminal\|code=
			# echo size_in_bytes >> /sys/module/zfs/parameters/zfs_arc_max
			}}

			You may check the current ARC usage by checking <code>arc_summary -s arc</code>, <code>cat /proc/spl/kstat/zfs/arcstats</code> or use the {{code\|arcstat.py}} script that's part of the {{code\|zfs}} package.

	{{highlight\|lang=terminal\|code=		{{highlight\|lang=terminal\|code=

2022-03-14T03:47:44Z

← Older revision		Revision as of 03:47, 14 March 2022
Line 412:		Line 412:
	*<code>compressratio</code> - get the compression ratio of the dataset		*<code>compressratio</code> - get the compression ratio of the dataset
	*<code>readonly</code> - Whether the dataset is read only		*<code>readonly</code> - Whether the dataset is read only
	*<code>compression=X</code> - the compression algorithm to use. Defaults to 'off' and depending on the system, valid choices are "on", "off", "lzjb", "gzip", "gzip-N", and "~~zle~~".		*<code>compression=X</code> - the compression algorithm to use. Defaults to 'off' and depending on the system, valid choices are "on", "off", "lzjb", "gzip", "gzip-N", "zle", and "zstd".
	*<code>copies=N</code> - how many times data within this dataset are written		*<code>copies=N</code> - how many times data within this dataset are written
	*<code>mountpoint=X</code> - The dataset mount point		*<code>mountpoint=X</code> - The dataset mount point
Line 421:		Line 421:
	To change a ZFS mount point:{{highlight\|lang=terminal\|code=		To change a ZFS mount point:{{highlight\|lang=terminal\|code=
	# zfs set mountpoint=/export storage		# zfs set mountpoint=/export storage
	}}To change the ZFS dataset compression:{{highlight\|lang=terminal\|code=		}}To change the ZFS dataset compression:{{highlight
	# zfs set compression=~~lz4~~ storage		\| lang = terminal
			\| code = # zfs set compression=zstd storage
	}}		}}
	====Transferring and receiving datasets====		====Transferring and receiving datasets====

2022-03-14T03:32:15Z

Added cheat sheet

@@ Line 1: / Line 1: @@
 ZFS is different from a traditional filesystem in that it acts as a volume management system (such as LVM) as well as handling the filesystem layer above (such as ext4).  The filesystem was originally developed by Sun Microsystems for the Solaris operating system but an open source version developed by OpenZFS has since been ported to FreeBSD, Mac OS, and Linux.
 ==Installation==
 ZFS is included with Solaris and FreeBSD out of the box.
@@ Line 89: / Line 171: @@
 *<code>ashift=N</code>. For disks with advanced format (AF) where sector sizes are 4K, you must adjust the <code>ashift=12</code> property manually to avoid performance degradation. Other ashift values will be covered below.
 *<code>copies=N</code>, where N is the number of copies. For important data, you may specify additional copies of the data to be written. In the event of any corruption, the additional copies help safe guard against data loss.
 {{Info

2021-07-17T17:45:50Z

Install ZFS on CentOS

← Older revision		Revision as of 17:45, 17 July 2021
Line 17:		Line 17:
	\| lang = terminal		\| lang = terminal
	}}		}}
	If you need to rebuild the zfs module for whatever reason, use the <code>dkms build</code> command: {{code\|dkms build -m zfs -v 0.6.5 -k 4.2.5-300.fc23.x86_64 && dkms install -m zfs}}		If you need to rebuild the zfs module for whatever reason, use the <code>dkms build zfs/zfs-version</code> command. Eg: <code>dkms build zfs/2.0.5</code> If you need to target a specific kernel version, you can also specify the kernel like so: <code>dkms build -m zfs -v 0.6.5 -k 4.2.5-300.fc23.x86_64 && dkms install -m zfs</code>

	====ArchLinux====		====ArchLinux====

2021-06-27T21:08:53Z

Creating snapshots

← Older revision		Revision as of 21:08, 27 June 2021
Line 401:		Line 401:
	*Individual dataset snapshot: <code>zpool/dataset@snapshot-name</code>		*Individual dataset snapshot: <code>zpool/dataset@snapshot-name</code>

	Create a new snapshot with the <code>zfs snapshot</code> command followed by the snapshot name. Eg: <code>~~zpool~~ snapshot zpool@snapshot-name</code>.		Create a new snapshot with the <code>zfs snapshot</code> command followed by the snapshot name. Eg: <code>zfs snapshot zpool/dataset@snapshot-name</code>.

	====Listing snapshots====		====Listing snapshots====

2021-04-08T22:10:28Z

A raidz pool

2021-04-08T21:38:08Z