Delmar/bikinibottom
3
1
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

"Updates"

Browse Source
This commit is contained in:
Julieñ
2026-05-26 14:38:04 +02:00
parent b61656bec2
commit 2a4f4722e3
1 changed files with 104 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
TuringPi/zfs.md
+104
View File
@@ -149,3 +149,107 @@ sudo systemctl enable zfs-import-cache
PS : on Debian, the installation of zfs-zed may already set up the necessary services. PS : on Debian, the installation of zfs-zed may already set up the necessary services.
You can configure /etc/zfs/zfs-list.cache (automatically generated) for faster mounting. You can configure /etc/zfs/zfs-list.cache (automatically generated) for faster mounting.
---
### Querying ZFS File System Information
The zfs list command provides an extensible mechanism for viewing and querying dataset information. Both basic and complex queries are explained in this section.
#### Listing Basic ZFS Information
You can list basic dataset information by using the zfs list command with no options. This command displays the names of all datasets on the system and the values of their used, available, referenced, and mountpoint properties. For more information about these properties, see [Introducing ZFS Properties](https://docs.oracle.com/cd/E18752_01/html/819-5461/gazsu.htmlgazss.html).
For example:
```
# <b>zfs list</b>
NAME USED AVAIL REFER MOUNTPOINT
pool 476K 16.5G 21K /pool
pool/clone 18K 16.5G 18K /pool/clone
pool/home 296K 16.5G 19K /pool/home
pool/home/marks 277K 16.5G 277K /pool/home/marks
pool/home/marks@snap 0 - 277K -
pool/test 18K 16.5G 18K /test
```
You can also use this command to display specific datasets by providing the dataset name on the command line. Additionally, use the \-r option to recursively display all descendents of that dataset. For example:
```
# <b>zfs list -r pool/home/marks</b>
NAME USED AVAIL REFER MOUNTPOINT
pool/home/marks 277K 16.5G 277K /pool/home/marks
pool/home/marks@snap 0 - 277K -
```
You can use the zfs list command with the mount point of a file system. For example:
```
# <b>zfs list /pool/home/marks</b>
NAME USED AVAIL REFER MOUNTPOINT
pool/home/marks 277K 16.5G 277K /pool/home/marks
```
The following example shows how to display basic information about tank/home/chua and all of its descendent datasets:
```
# <b>zfs list -r tank/home/chua</b>
NAME USED AVAIL REFER MOUNTPOINT
tank/home/chua 26.0K 4.81G 10.0K /tank/home/chua
tank/home/chua/projects 16K 4.81G 9.0K /tank/home/chua/projects
tank/home/chua/projects/fs1 8K 4.81G 8K /tank/home/chua/projects/fs1
tank/home/chua/projects/fs2 8K 4.81G 8K /tank/home/chua/projects/fs2
```
For additional information about the zfs list command, see [zfs(1M)](https://docs.oracle.com/cd/E18752_01/html/819-5461/gazsu.html../816-5166/zfs-1m.html#REFMAN1Mzfs-1m).
#### Creating Complex ZFS Queries
The zfs list output can be customized by using the \-o, \-t, and \-H options.
You can customize property value output by using the \-o option and a comma-separated list of desired properties. You can supply any dataset property as a valid argument. For a list of all supported dataset properties, see [Introducing ZFS Properties](https://docs.oracle.com/cd/E18752_01/html/819-5461/gazsu.htmlgazss.html). In addition to the properties defined, the \-o option list can also contain the literal name to indicate that the output should include the name of the dataset.
The following example uses zfs list to display the dataset name, along with the sharenfs and mountpoint property values.
```
# <b>zfs list -o name,sharenfs,mountpoint</b>
NAME SHARENFS MOUNTPOINT
tank off /tank
tank/home on /tank/home
tank/home/ahrens on /tank/home/ahrens
tank/home/bonwick on /tank/home/bonwick
tank/home/chua on /tank/home/chua
tank/home/eschrock on legacy
tank/home/moore on /tank/home/moore
tank/home/tabriz ro /tank/home/tabriz
```
You can use the \-t option to specify the types of datasets to display. The valid types are described in the following table.
**Table 6-2 Types of ZFS Datasets**
<table border="0" cellpadding="0" cellspacing="0" class="dkgrey1" width="100%"><tbody><tr><td><table border="0" cellpadding="0" cellspacing="1" width="100%" class="vatop"><colgroup><col width="29%"><col width="70%"></colgroup><tbody><tr><th class="columncaption" align="left" valign="top"><div class="headerpadding">Type</div></th><th class="columncaption" align="left" valign="top"><div class="headerpadding">Description</div></th></tr><tr class="yellow2"><td align="left" valign="top"><div class="pad5x10"><tt>filesystem</tt></div></td><td align="left" valign="top"><div class="pad5x10">File systems and clones</div></td></tr><tr class="yellow2"><td align="left" valign="top"><div class="pad5x10"><tt>volume</tt></div></td><td align="left" valign="top"><div class="pad5x10">Volumes</div></td></tr><tr class="yellow2"><td align="left" valign="top"><div class="pad5x10"><tt>snapshot</tt></div></td><td align="left" valign="top"><div class="pad5x10">Snapshots</div></td></tr></tbody></table></td></tr></tbody></table>
The \-t options takes a comma-separated list of the types of datasets to be displayed. The following example uses the \-t and \-o options simultaneously to show the name and used property for all file systems:
```
# <b>zfs list -t filesystem -o name,used</b>
NAME USED
pool 476K
pool/clone 18K
pool/home 296K
pool/home/marks 277K
pool/test 18K
```
You can use the \-H option to omit the zfs list header from the generated output. With the \-H option, all white space is replaced by the Tab character. This option can be useful when you need parseable output, for example, when scripting. The following example shows the output generated from using the zfs list command with the \-H option:
```
# <b>zfs list -H -o name</b>
pool
pool/clone
pool/home
pool/home/marks
pool/home/marks@snap
pool/test
```