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Oracle Solaris ZFS Administration Guide     Oracle Solaris 11 Express 11/10
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Document Information


1.  Oracle Solaris ZFS File System (Introduction)

2.  Getting Started With Oracle Solaris ZFS

3.  Oracle Solaris ZFS and Traditional File System Differences

4.  Managing Oracle Solaris ZFS Storage Pools

5.  Managing ZFS Root Pool Components

6.  Managing Oracle Solaris ZFS File Systems

Managing ZFS File Systems (Overview)

Creating, Destroying, and Renaming ZFS File Systems

Creating a ZFS File System

Destroying a ZFS File System

Renaming a ZFS File System

Introducing ZFS Properties

ZFS Read-Only Native Properties

The used Property

Settable ZFS Native Properties

The canmount Property

The casesensitivity Property

The dedup Property

The encryption Property

The recordsize Property

The sharesmb Property

The volsize Property

ZFS User Properties

Querying ZFS File System Information

Listing Basic ZFS Information

Creating Complex ZFS Queries

Managing ZFS Properties

Setting ZFS Properties

Inheriting ZFS Properties

Querying ZFS Properties

Querying ZFS Properties for Scripting

Mounting and Sharing ZFS File Systems

Managing ZFS Mount Points

Automatic Mount Points

Legacy Mount Points

Mounting ZFS File Systems

Using Temporary Mount Properties

Unmounting ZFS File Systems

Sharing and Unsharing ZFS File Systems

Controlling Share Semantics

Unsharing ZFS File Systems

Sharing ZFS File Systems

Legacy Share Behavior

Sharing ZFS Files in an Oracle Solaris SMB Environment

Setting ZFS Quotas and Reservations

Setting Quotas on ZFS File Systems

Setting User and Group Quotas on a ZFS File System

Setting Reservations on ZFS File Systems

Encrypting ZFS File Systems

Changing an Encrypted ZFS File System's Keys

Delegating ZFS Key Operation Permissions

Mounting an Encrypted ZFS File System

Interactions Between ZFS Compression, Deduplication, and Encryption Properties

Examples of Encrypting ZFS File Systems

Upgrading ZFS File Systems

7.  Working With Oracle Solaris ZFS Snapshots and Clones

8.  Using ACLs and Attributes to Protect Oracle Solaris ZFS Files

9.  Oracle Solaris ZFS Delegated Administration

10.  Oracle Solaris ZFS Advanced Topics

11.  Oracle Solaris ZFS Troubleshooting and Pool Recovery

A.  Oracle Solaris ZFS Version Descriptions


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.

For example:

# zfs list
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:

# zfs list -r pool/home/marks
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:

# zfs list /pool/home/marks
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:

# zfs list -r tank/home/chua
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).

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. 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.

# zfs list -o name,sharenfs,mountpoint
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

File systems and clones

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:

# zfs list -t filesystem -o name,used
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:

# zfs list -H -o name