-'\" te
+'\" t
+.\"
+.\" CDDL HEADER START
+.\"
+.\" The contents of this file are subject to the terms of the
+.\" Common Development and Distribution License (the "License").
+.\" You may not use this file except in compliance with the License.
+.\"
+.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+.\" or http://www.opensolaris.org/os/licensing.
+.\" See the License for the specific language governing permissions
+.\" and limitations under the License.
+.\"
+.\" When distributing Covered Code, include this CDDL HEADER in each
+.\" file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+.\" If applicable, add the following below this CDDL HEADER, with the
+.\" fields enclosed by brackets "[]" replaced with your own identifying
+.\" information: Portions Copyright [yyyy] [name of copyright owner]
+.\"
+.\" CDDL HEADER END
+.\"
+.\"
.\" Copyright (c) 2009 Sun Microsystems, Inc. All Rights Reserved.
-.\" Copyright (c) 2012 by Delphix. All rights reserved.
-.\" Copyright (c) 2012 Nexenta Systems, Inc. All Rights Reserved.
-.\" Copyright (c) 2012, Joyent, Inc. All rights reserved.
.\" Copyright 2011 Joshua M. Clulow <josh@sysmgr.org>
-.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License. You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.
-.\" See the License for the specific language governing permissions and limitations under the License. When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with
-.\" the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
-.TH zfs 8 "Aug 16, 2012" "ZFS pool 28, filesystem 5" "System Administration Commands"
+.\" Copyright (c) 2014 by Delphix. All rights reserved.
+.\" Copyright (c) 2012, Joyent, Inc. All rights reserved.
+.\" Copyright 2012 Nexenta Systems, Inc. All Rights Reserved.
+.\" Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
+.\"
+.TH zfs 8 "Nov 19, 2013" "ZFS pool 28, filesystem 5" "System Administration Commands"
.SH NAME
zfs \- configures ZFS file systems
.SH SYNOPSIS
.LP
.nf
-\fBzfs\fR \fBsnapshot | snap\fR [\fB-r\fR] [\fB-o\fR \fIproperty\fR=\fIvalue\fR]...
- \fIfilesystem@snapname\fR|\fIvolume@snapname\fR
+\fBzfs\fR \fBdestroy\fR \fIfilesystem\fR|\fIvolume\fR#\fIbookmark\fR
+.fi
+
+.LP
+.nf
+\fBzfs\fR \fBsnapshot | snap\fR [\fB-r\fR] [\fB-o\fR \fIproperty\fR=\fIvalue\fR] ...
+ \fIfilesystem@snapname\fR|\fIvolume@snapname\fR ...
.fi
.LP
.LP
.nf
-\fBzfs\fR \fBlist\fR [\fB-r\fR|\fB-d\fR \fIdepth\fR][\fB-H\fR][\fB-o\fR \fIproperty\fR[,...]] [\fB-t\fR \fItype\fR[,...]]
- [\fB-s\fR \fIproperty\fR] ... [\fB-S\fR \fIproperty\fR] ... [\fIfilesystem\fR|\fIvolume\fR|\fIsnapshot\fR|\fIsnap\fR] ...
+\fBzfs\fR \fBlist\fR [\fB-r\fR|\fB-d\fR \fIdepth\fR][\fB-Hp\fR][\fB-o\fR \fIproperty\fR[,\fIproperty\fR]...] [\fB-t\fR \fItype\fR[,\fItype\fR]..]
+ [\fB-s\fR \fIproperty\fR] ... [\fB-S\fR \fIproperty\fR] ... [\fIfilesystem\fR|\fIvolume\fR|\fIsnapshot\fR] ...
.fi
.LP
.LP
.nf
-\fBzfs\fR \fBuserspace\fR [\fB-niHp\fR] [\fB-o\fR \fIfield\fR[,...]] [\fB-sS\fR \fIfield\fR] ...
- [\fB-t\fR \fItype\fR[,...]] \fIfilesystem\fR|\fIsnapshot\fR
+\fBzfs\fR \fBuserspace\fR [\fB-Hinp\fR] [\fB-o\fR \fIfield\fR[,...]] [\fB-s\fR \fIfield\fR] ...
+ [\fB-S\fR \fIfield\fR] ... [\fB-t\fR \fItype\fR[,...]] \fIfilesystem\fR|\fIsnapshot\fR
.fi
.LP
.nf
-\fBzfs\fR \fBgroupspace\fR [\fB-niHp\fR] [\fB-o\fR \fIfield\fR[,...]] [\fB-sS\fR \fIfield\fR] ...
- [\fB-t\fR \fItype\fR[,...]] \fIfilesystem\fR|\fIsnapshot\fR
+\fBzfs\fR \fBgroupspace\fR [\fB-Hinp\fR] [\fB-o\fR \fIfield\fR[,...]] [\fB-s\fR \fIfield\fR] ...
+ [\fB-S\fR \fIfield\fR] ... [\fB-t\fR \fItype\fR[,...]] \fIfilesystem\fR|\fIsnapshot\fR
.fi
.LP
.LP
.nf
-\fBzfs\fR \fBsend\fR [\fB-DnPpRrv\fR] [\fB-\fR[\fBiI\fR] \fIsnapshot\fR] \fIsnapshot\fR
+\fBzfs\fR \fBbookmark\fR \fIsnapshot\fR \fIbookmark\fR
+.fi
+
+.LP
+.nf
+\fBzfs\fR \fBsend\fR [\fB-DnPpRve\fR] [\fB-\fR[\fBiI\fR] \fIsnapshot\fR] \fIsnapshot\fR
+.fi
+
+.LP
+.nf
+\fBzfs\fR \fBsend\fR [\fB-e\fR] [\fB-i \fIsnapshot\fR|\fIbookmark\fR]\fR \fIfilesystem\fR|\fIvolume\fR|\fIsnapshot\fR
.fi
.LP
\fBzfs\fR \fBdiff\fR [\fB-FHt\fR] \fIsnapshot\fR \fIsnapshot|filesystem\fR
.SH DESCRIPTION
-.sp
.LP
The \fBzfs\fR command configures \fBZFS\fR datasets within a \fBZFS\fR storage pool, as described in \fBzpool\fR(8). A dataset is identified by a unique path within the \fBZFS\fR namespace. For example:
.sp
.RE
.SS "ZFS File System Hierarchy"
-.sp
.LP
A \fBZFS\fR storage pool is a logical collection of devices that provide space for datasets. A storage pool is also the root of the \fBZFS\fR file system hierarchy.
.sp
.LP
See \fBzpool\fR(8) for more information on creating and administering pools.
.SS "Snapshots"
-.sp
.LP
A snapshot is a read-only copy of a file system or volume. Snapshots can be created extremely quickly, and initially consume no additional space within the pool. As data within the active dataset changes, the snapshot consumes more data than would otherwise be shared with the active dataset.
.sp
.LP
-Snapshots can have arbitrary names. Snapshots of volumes can be cloned or rolled back, but cannot be accessed independently.
+Snapshots can have arbitrary names. Snapshots of volumes can be cloned or rolled back. Visibility is determined by the \fBsnapdev\fR property of the parent volume.
.sp
.LP
File system snapshots can be accessed under the \fB\&.zfs/snapshot\fR directory in the root of the file system. Snapshots are automatically mounted on demand and may be unmounted at regular intervals. The visibility of the \fB\&.zfs\fR directory can be controlled by the \fBsnapdir\fR property.
.SS "Clones"
-.sp
.LP
A clone is a writable volume or file system whose initial contents are the same as another dataset. As with snapshots, creating a clone is nearly instantaneous, and initially consumes no additional space.
.sp
.LP
The clone parent-child dependency relationship can be reversed by using the \fBpromote\fR subcommand. This causes the "origin" file system to become a clone of the specified file system, which makes it possible to destroy the file system that the clone was created from.
.SS "Mount Points"
-.sp
.LP
Creating a \fBZFS\fR file system is a simple operation, so the number of file systems per system is likely to be numerous. To cope with this, \fBZFS\fR automatically manages mounting and unmounting file systems without the need to edit the \fB/etc/fstab\fR file. All automatically managed file systems are mounted by \fBZFS\fR at boot time.
.sp
.sp
.LP
If needed, \fBZFS\fR file systems can also be managed with traditional tools (\fBmount\fR, \fBumount\fR, \fB/etc/fstab\fR). If a file system's mount point is set to \fBlegacy\fR, \fBZFS\fR makes no attempt to manage the file system, and the administrator is responsible for mounting and unmounting the file system.
-.SS "Native Properties"
+.SS "Deduplication"
+.LP
+Deduplication is the process for removing redundant data at the block-level, reducing the total amount of data stored. If a file system has the \fBdedup\fR property enabled, duplicate data blocks are removed synchronously. The result is that only unique data is stored and common components are shared among files.
.sp
+\fBWARNING: DO NOT ENABLE DEDUPLICATION UNLESS YOU NEED IT AND KNOW EXACTLY WHAT YOU ARE DOING!\fR
+.sp
+Deduplicating data is a very resource-intensive operation. It is generally recommended that you have \fIat least\fR 1.25 GB of RAM per 1 TB of storage when you enable deduplication. But calculating the exact requirenments is a somewhat complicated affair. Please see the \fBOracle Dedup Guide\fR for more information..
+.sp
+Enabling deduplication on an improperly-designed system will result in extreme performance issues (extremely slow filesystem and snapshot deletions etc.) and can potentially lead to data loss (i.e. unimportable pool due to memory exhaustion) if your system is not built for this purpose. Deduplication affects the processing power (CPU), disks (and the controller) as well as primary (real) memory.
+.sp
+Before creating a pool with deduplication enabled, ensure that you have planned your hardware requirements appropriately and implemented appropriate recovery practices, such as regular backups.
+.sp
+Unless necessary, deduplication should NOT be enabled on a system. Instead, consider using \fIcompression=lz4\fR, as a less resource-intensive alternative.
+.SS "Native Properties"
.LP
Properties are divided into two types, native properties and user-defined (or "user") properties. Native properties either export internal statistics or control \fBZFS\fR behavior. In addition, native properties are either editable or read-only. User properties have no effect on \fBZFS\fR behavior, but you can use them to annotate datasets in a way that is meaningful in your environment. For more information about user properties, see the "User Properties" section, below.
.sp
.ne 2
.mk
.na
+\fB\fBlogicalreferenced\fR\fR
+.ad
+.sp .6
+.RS 4n
+The amount of space that is "logically" accessible by this dataset. See
+the \fBreferenced\fR property. The logical space ignores the effect of
+the \fBcompression\fR and \fBcopies\fR properties, giving a quantity
+closer to the amount of data that applications see. However, it does
+include space consumed by metadata.
+.sp
+This property can also be referred to by its shortened column name,
+\fBlrefer\fR.
+.RE
+
+.sp
+.ne 2
+.na
+\fB\fBlogicalused\fR\fR
+.ad
+.sp .6
+.RS 4n
+The amount of space that is "logically" consumed by this dataset and all
+its descendents. See the \fBused\fR property. The logical space
+ignores the effect of the \fBcompression\fR and \fBcopies\fR properties,
+giving a quantity closer to the amount of data that applications see.
+However, it does include space consumed by metadata.
+.sp
+This property can also be referred to by its shortened column name,
+\fBlused\fR.
+.RE
+
+.sp
+.ne 2
+.na
\fB\fBmounted\fR\fR
.ad
.sp .6
Controls how \fBACL\fR entries are inherited when files and directories are created. A file system with an \fBaclinherit\fR property of \fBdiscard\fR does not inherit any \fBACL\fR entries. A file system with an \fBaclinherit\fR property value of \fBnoallow\fR only inherits inheritable \fBACL\fR entries that specify "deny" permissions. The property value \fBrestricted\fR (the default) removes the \fBwrite_acl\fR and \fBwrite_owner\fR permissions when the \fBACL\fR entry is inherited. A file system with an \fBaclinherit\fR property value of \fBpassthrough\fR inherits all inheritable \fBACL\fR entries without any modifications made to the \fBACL\fR entries when they are inherited. A file system with an \fBaclinherit\fR property value of \fBpassthrough-x\fR has the same meaning as \fBpassthrough\fR, except that the \fBowner@\fR, \fBgroup@\fR, and \fBeveryone@\fR \fBACE\fRs inherit the execute permission only if the file creation mode also requests the execute bit.
.sp
When the property value is set to \fBpassthrough\fR, files are created with a mode determined by the inheritable \fBACE\fRs. If no inheritable \fBACE\fRs exist that affect the mode, then the mode is set in accordance to the requested mode from the application.
+.sp
+The \fBaclinherit\fR property does not apply to Posix ACLs.
.RE
.sp
.ne 2
.mk
.na
-\fB\fBaclmode\fR=\fBdiscard\fR | \fBgroupmask\fR | \fBpassthrough\fR\fR
+\fB\fBacltype\fR=\fBnoacl\fR | \fBposixacl\fR \fR
.ad
.sp .6
.RS 4n
-Controls how an \fBACL\fR is modified during \fBchmod\fR(2). A file system with an \fBaclmode\fR property of \fBdiscard\fR deletes all \fBACL\fR entries that do not represent the mode of the file. An \fBaclmode\fR property of \fBgroupmask\fR (the default) reduces user or group permissions. The permissions are reduced, such that they are no greater than the group permission bits, unless it is a user entry that has the same \fBUID\fR as the owner of the file or directory. In this case, the \fBACL\fR permissions are reduced so that they are no greater than owner permission bits. A file system with an \fBaclmode\fR property of \fBpassthrough\fR indicates that no changes are made to the \fBACL\fR other than generating the necessary \fBACL\fR entries to represent the new mode of the file or directory.
+Controls whether ACLs are enabled and if so what type of ACL to use. When
+a file system has the \fBacltype\fR property set to \fBnoacl\fR (the default)
+then ACLs are disabled. Setting the \fBacltype\fR property to \fBposixacl\fR
+indicates Posix ACLs should be used. Posix ACLs are specific to Linux and
+are not functional on other platforms. Posix ACLs are stored as an xattr and
+therefore will not overwrite any existing ZFS/NFSv4 ACLs which may be set.
+Currently only \fBposixacls\fR are supported on Linux.
+.sp
+To obtain the best performance when setting \fBposixacl\fR users are strongly
+encouraged to set the \fBxattr=sa\fR property. This will result in the
+Posix ACL being stored more efficiently on disk. But as a consequence of this
+all new xattrs will only be accessable from ZFS implementations which support
+the \fBxattr=sa\fR property. See the \fBxattr\fR property for more details.
.RE
.sp
.ad
.sp .6
.RS 4n
-Controls whether the access time for files is updated when they are read. Turning this property off avoids producing write traffic when reading files and can result in significant performance gains, though it might confuse mailers and other similar utilities. The default value is \fBon\fR.
+Controls whether the access time for files is updated when they are read. Turning this property off avoids producing write traffic when reading files and can result in significant performance gains, though it might confuse mailers and other similar utilities. The default value is \fBon\fR. See also \fBrelatime\fR below.
.RE
.sp
.ad
.sp .6
.RS 4n
-Controls the checksum used to verify data integrity. The default value is \fBon\fR, which automatically selects an appropriate algorithm (currently, \fBfletcher2\fR, but this may change in future releases). The value \fBoff\fR disables integrity checking on user data. Disabling checksums is \fBNOT\fR a recommended practice.
+Controls the checksum used to verify data integrity. The default value is \fBon\fR, which automatically selects an appropriate algorithm (currently, \fBfletcher4\fR, but this may change in future releases). The value \fBoff\fR disables integrity checking on user data. Disabling checksums is \fBNOT\fR a recommended practice.
.sp
Changing this property affects only newly-written data.
.RE
.ne 2
.mk
.na
-\fBcompression\fR=\fBon\fR | \fBoff\fR | \fBlzjb\fR | \fBgzip\fR | \fBgzip-\fR\fIN\fR | \fBzle\fR
+\fBcompression\fR=\fBon\fR | \fBoff\fR | \fBlzjb\fR | \fBgzip\fR | \fBgzip-\fR\fIN\fR | \fBzle\fR | \fBlz4\fR
.ad
.sp .6
.RS 4n
.sp
The \fBzle\fR (zero-length encoding) compression algorithm is a fast and simple algorithm to eliminate runs of zeroes.
.sp
+The \fBlz4\fR compression algorithm is a high-performance replacement
+for the \fBlzjb\fR algorithm. It features significantly faster
+compression and decompression, as well as a moderately higher
+compression ratio than \fBlzjb\fR, but can only be used on pools with
+the \fBlz4_compress\fR feature set to \fIenabled\fR. See
+\fBzpool-features\fR(5) for details on ZFS feature flags and the
+\fBlz4_compress\fR feature.
+.sp
This property can also be referred to by its shortened column name \fBcompress\fR. Changing this property affects only newly-written data.
.RE
Changing this property only affects newly-written data. Therefore, set this property at file system creation time by using the \fB-o\fR \fBcopies=\fR\fIN\fR option.
.RE
+.sp
+.ne 2
+.mk
+.na
+\fB\fBdedup\fR=\fBon\fR | \fBoff\fR | \fBverify\fR | \fBsha256\fR[,\fBverify\fR]\fR
+.ad
+.sp .6
+.RS 4n
+Controls whether deduplication is in effect for a dataset. The default value is \fBoff\fR. The default checksum used for deduplication is \fBsha256\fR (subject to change). When \fBdedup\fR is enabled, the \fBdedup\fR checksum algorithm overrides the \fBchecksum\fR property. Setting the value to \fBverify\fR is equivalent to specifying \fBsha256,verify\fR.
+.sp
+If the property is set to \fBverify\fR, then, whenever two blocks have the same signature, ZFS will do a byte-for-byte comparison with the existing block to ensure that the contents are identical.
+.sp
+Unless necessary, deduplication should NOT be enabled on a system. See \fBDeduplication\fR above.
+.RE
+
.sp
.ne 2
.mk
Controls whether processes can be executed from within this file system. The default value is \fBon\fR.
.RE
+.sp
+.ne 2
+.mk
+.na
+\fB\fBmlslabel\fR=\fIlabel\fR | \fBnone\fR\fR
+.ad
+.sp .6
+.RS 4n
+The \fBmlslabel\fR property is a sensitivity label that determines if a dataset can be mounted in a zone on a system with Trusted Extensions enabled. If the labeled dataset matches the labeled zone, the dataset can be mounted and accessed from the labeled zone.
+.sp
+When the \fBmlslabel\fR property is not set, the default value is \fBnone\fR. Setting the \fBmlslabel\fR property to \fBnone\fR is equivalent to removing the property.
+.sp
+The \fBmlslabel\fR property can be modified only when Trusted Extensions is enabled and only with appropriate privilege. Rights to modify it cannot be delegated. When changing a label to a higher label or setting the initial dataset label, the \fB{PRIV_FILE_UPGRADE_SL}\fR privilege is required. When changing a label to a lower label or the default (\fBnone\fR), the \fB{PRIV_FILE_DOWNGRADE_SL}\fR privilege is required. Changing the dataset to labels other than the default can be done only when the dataset is not mounted. When a dataset with the default label is mounted into a labeled-zone, the mount operation automatically sets the \fBmlslabel\fR property to the label of that zone.
+.sp
+When Trusted Extensions is \fBnot\fR enabled, only datasets with the default label (\fBnone\fR) can be mounted.
+.sp
+Zones are a Solaris feature and are not relevant on Linux.
+.RE
+
.sp
.ne 2
.mk
.ad
.sp .6
.RS 4n
-Limits the amount of space consumed by the specified user. User space consumption is identified by the \fBuserspace@\fR\fIuser\fR property.
+Limits the amount of space consumed by the specified user. Similar to the \fBrefquota\fR property, the \fBuserquota\fR space calculation does not include space that is used by descendent datasets, such as snapshots and clones. User space consumption is identified by the \fBuserspace@\fR\fIuser\fR property.
.sp
Enforcement of user quotas may be delayed by several seconds. This delay means that a user might exceed their quota before the system notices that they are over quota and begins to refuse additional writes with the \fBEDQUOT\fR error message . See the \fBzfs userspace\fR subcommand for more information.
.sp
.ne 2
.mk
.na
+\fB\fBredundant_metadata\fR=\fBall\fR | \fBmost\fR\fR
+.ad
+.sp .6
+.RS 4n
+Controls what types of metadata are stored redundantly. ZFS stores an
+extra copy of metadata, so that if a single block is corrupted, the
+amount of user data lost is limited. This extra copy is in addition to
+any redundancy provided at the pool level (e.g. by mirroring or RAID-Z),
+and is in addition to an extra copy specified by the \fBcopies\fR
+property (up to a total of 3 copies). For example if the pool is
+mirrored, \fBcopies\fR=2, and \fBredundant_metadata\fR=most, then ZFS
+stores 6 copies of most metadata, and 4 copies of data and some
+metadata.
+.sp
+When set to \fBall\fR, ZFS stores an extra copy of all metadata. If a
+single on-disk block is corrupt, at worst a single block of user data
+(which is \fBrecordsize\fR bytes long) can be lost.
+.sp
+When set to \fBmost\fR, ZFS stores an extra copy of most types of
+metadata. This can improve performance of random writes, because less
+metadata must be written. In practice, at worst about 100 blocks (of
+\fBrecordsize\fR bytes each) of user data can be lost if a single
+on-disk block is corrupt. The exact behavior of which metadata blocks
+are stored redundantly may change in future releases.
+.sp
+The default value is \fBall\fR.
+.RE
+
+.sp
+.ne 2
+.na
\fB\fBrefquota\fR=\fIsize\fR | \fBnone\fR\fR
.ad
.sp .6
This property can also be referred to by its shortened column name, \fBrefreserv\fR.
.RE
+.sp
+.ne 2
+.mk
+.na
+\fB\fBrelatime\fR=\fBon\fR | \fBoff\fR\fR
+.ad
+.sp .6
+.RS 4n
+Controls the manner in which the access time is updated when \fBatime=on\fR is set. Turning this property \fBon\fR causes the access time to be updated relative to the modify or change time. Access time is only updated if the previous access time was earlier than the current modify or change time or if the existing access time hasn't been updated within the past 24 hours. The default value is \fBoff\fR.
+.RE
+
.sp
.ne 2
.mk
.ne 2
.mk
.na
-\fB\fBsharesmb\fR=\fBon\fR | \fBoff\fR | \fIopts\fR\fR
+\fB\fBsharesmb\fR=\fBon\fR | \fBoff\fR
.ad
.sp .6
.RS 4n
-Controls whether the file system is shared by using the Solaris \fBCIFS\fR service, and what options are to be used. A file system with the \fBsharesmb\fR property set to \fBoff\fR is managed through traditional tools such as \fBsharemgr\fR(1M). Otherwise, the file system is automatically shared and unshared with the \fBzfs share\fR and \fBzfs unshare\fR commands. If the property is set to \fBon\fR, the \fBsharemgr\fR(1M) command is invoked with no options. Otherwise, the \fBsharemgr\fR(1M) command is invoked with options equivalent to the contents of this property.
+Controls whether the file system is shared by using \fBSamba USERSHARES\fR, and what options are to be used. Otherwise, the file system is automatically shared and unshared with the \fBzfs share\fR and \fBzfs unshare\fR commands. If the property is set to \fBon\fR, the \fBnet\fR(8) command is invoked to create a \fBUSERSHARE\fR.
+.sp
+Because \fBSMB\fR shares requires a resource name, a unique resource name is constructed from the dataset name. The constructed name is a copy of the dataset name except that the characters in the dataset name, which would be illegal in the resource name, are replaced with underscore (\fB_\fR) characters. The ZFS On Linux driver does not (yet) support additional options which might be availible in the Solaris version.
+.sp
+If the \fBsharesmb\fR property is set to \fBoff\fR, the file systems are unshared.
+.sp
+In Linux, the share is created with the ACL (Access Control List) "Everyone:F" ("F" stands for "full permissions", ie. read and write permissions) and no guest access (which means samba must be able to authenticate a real user, system passwd/shadow, ldap or smbpasswd based) by default. This means that any additional access control (dissalow specific user specific access etc) must be done on the underlaying filesystem.
+.sp
+.in +2
+Example to mount a SMB filesystem shared through ZFS (share/tmp):
+.mk
+Note that a user and his/her password \fBmust\fR be given!
+.sp
+.in +2
+smbmount //127.0.0.1/share_tmp /mnt/tmp -o user=workgroup/turbo,password=obrut,uid=1000
+.in -2
+.in -2
+.sp
+.ne 2
+.mk
+.na
+\fBMinimal /etc/samba/smb.conf configuration\fR
.sp
-Because \fBSMB\fR shares requires a resource name, a unique resource name is constructed from the dataset name. The constructed name is a copy of the dataset name except that the characters in the dataset name, which would be illegal in the resource name, are replaced with underscore (\fB_\fR) characters. A pseudo property "name" is also supported that allows you to replace the data set name with a specified name. The specified name is then used to replace the prefix dataset in the case of inheritance. For example, if the dataset \fBdata/home/john\fR is set to \fBname=john\fR, then \fBdata/home/john\fR has a resource name of \fBjohn\fR. If a child dataset of \fBdata/home/john/backups\fR, it has a resource name of \fBjohn_backups\fR.
+.in +2
+* Samba will need to listen to 'localhost' (127.0.0.1) for the zfs utilities to communitate with samba. This is the default behavior for most Linux distributions.
+.sp
+* Samba must be able to authenticate a user. This can be done in a number of ways, depending on if using the system password file, LDAP or the Samba specific smbpasswd file. How to do this is outside the scope of this manual. Please refer to the smb.conf(5) manpage for more information.
.sp
-When SMB shares are created, the SMB share name appears as an entry in the \fB\&.zfs/shares\fR directory. You can use the \fBls\fR or \fBchmod\fR command to display the share-level ACLs on the entries in this directory.
+* See the \fBUSERSHARE\fR section of the \fBsmb.conf\fR(5) man page for all configuration options in case you need to modify any options to the share afterwards. Do note that any changes done with the 'net' command will be undone if the share is every unshared (such as at a reboot etc). In the future, ZoL will be able to set specific options directly using sharesmb=<option>.
.sp
-When the \fBsharesmb\fR property is changed for a dataset, the dataset and any children inheriting the property are re-shared with the new options, only if the property was previously set to \fBoff\fR, or if they were shared before the property was changed. If the new property is set to \fBoff\fR, the file systems are unshared.
+.in -2
.RE
.sp
.ad
.sp .6
.RS 4n
-Controls whether the file system is shared via \fBNFS\fR, and what options are used. A file system with a \fBsharenfs\fR property of \fBoff\fR is managed through traditional tools such as \fBshare\fR(1M), \fBunshare\fR(1M), and \fBdfstab\fR(4). Otherwise, the file system is automatically shared and unshared with the \fBzfs share\fR and \fBzfs unshare\fR commands. If the property is set to \fBon\fR, the \fBshare\fR(1M) command is invoked with no options. Otherwise, the \fBshare\fR(1M) command is invoked with options equivalent to the contents of this property.
+Controls whether the file system is shared via \fBNFS\fR, and what options are used. A file system with a \fBsharenfs\fR property of \fBoff\fR is managed with the \fBexportfs\fR(8) command and entries in \fB/etc/exports\fR file. Otherwise, the file system is automatically shared and unshared with the \fBzfs share\fR and \fBzfs unshare\fR commands. If the property is set to \fBon\fR, the dataset is shared using the \fBexportfs\fR(8) command in the following manner (see \fBexportfs\fR(8) for the meaning of the different options):
+.sp
+.in +4
+.nf
+/usr/sbin/exportfs -i -o sec=sys,rw,no_subtree_check,no_root_squash,mountpoint *:<mountpoint of dataset>
+.fi
+.in -4
+.sp
+Otherwise, the \fBexportfs\fR(8) command is invoked with options equivalent to the contents of this property.
.sp
When the \fBsharenfs\fR property is changed for a dataset, the dataset and any children inheriting the property are re-shared with the new options, only if the property was previously \fBoff\fR, or if they were shared before the property was changed. If the new property is \fBoff\fR, the file systems are unshared.
.RE
Provide a hint to ZFS about handling of synchronous requests in this dataset. If \fBlogbias\fR is set to \fBlatency\fR (the default), ZFS will use pool log devices (if configured) to handle the requests at low latency. If \fBlogbias\fR is set to \fBthroughput\fR, ZFS will not use configured pool log devices. ZFS will instead optimize synchronous operations for global pool throughput and efficient use of resources.
.RE
+.sp
+.ne 2
+.mk
+.na
+\fB\fBsnapdev\fR=\fBhidden\fR | \fBvisible\fR\fR
+.ad
+.sp .6
+.RS 4n
+Controls whether the snapshots devices of zvol's are hidden or visible. The default value is \fBhidden\fR.
+.RE
+
.sp
.ne 2
.mk
.ne 2
.mk
.na
-\fB\fBsync\fR=\fBdefault\fR | \fBalways\fR | \fBdisabled\fR\fR
+\fB\fBsync\fR=\fBstandard\fR | \fBalways\fR | \fBdisabled\fR\fR
.ad
.sp .6
.RS 4n
Controls the behavior of synchronous requests (e.g. fsync, O_DSYNC).
-\fBdefault\fR is the POSIX specified behavior of ensuring all synchronous
+\fBstandard\fR is the POSIX specified behavior of ensuring all synchronous
requests are written to stable storage and all devices are flushed to ensure
data is not cached by device controllers (this is the default). \fBalways\fR
causes every file system transaction to be written and flushed before its
.ne 2
.mk
.na
-\fB\fBxattr\fR=\fBon\fR | \fBoff\fR\fR
+\fB\fBxattr\fR=\fBon\fR | \fBoff\fR | \fBsa\fR\fR
.ad
.sp .6
.RS 4n
-Controls whether extended attributes are enabled for this file system. The default value is \fBon\fR.
+Controls whether extended attributes are enabled for this file system. Two
+styles of extended attributes are supported either directory based or system
+attribute based.
+.sp
+The default value of \fBon\fR enables directory based extended attributes.
+This style of xattr imposes no practical limit on either the size or number of
+xattrs which may be set on a file. Although under Linux the \fBgetxattr\fR(2)
+and \fBsetxattr\fR(2) system calls limit the maximum xattr size to 64K. This
+is the most compatible style of xattr and it is supported by the majority of
+ZFS implementations.
+.sp
+System attribute based xattrs may be enabled by setting the value to \fBsa\fR.
+The key advantage of this type of xattr is improved performance. Storing
+xattrs as system attributes significantly decreases the amount of disk IO
+required. Up to 64K of xattr data may be stored per file in the space reserved
+for system attributes. If there is not enough space available for an xattr then
+it will be automatically written as a directory based xattr. System attribute
+based xattrs are not accessable on platforms which do not support the
+\fBxattr=sa\fR feature.
+.sp
+The use of system attribute based xattrs is strongly encouraged for users of
+SELinux or Posix ACLs. Both of these features heavily rely of xattrs and
+benefit significantly from the reduced xattr access time.
.RE
.sp
.sp
.LP
The \fBcasesensitivity\fR, \fBnormalization\fR, and \fButf8only\fR properties are also new permissions that can be assigned to non-privileged users by using the \fBZFS\fR delegated administration feature.
-.SS "Temporary Mount Point Properties"
+.RE
+
+.sp
+.ne 2
+.mk
+.na
+\fB\fBcontext\fR=\fBSELinux_User:SElinux_Role:Selinux_Type:Sensitivity_Level\fR\fR
+.ad
+.sp .6
+.RS 4n
+This flag sets the SELinux context for all files in the filesytem under the mountpoint for that filesystem. See \fBselinux\fR(8) for more information.
+.RE
+
+.sp
+.ne 2
+.mk
+.na
+\fB\fBfscontext\fR=\fBSELinux_User:SElinux_Role:Selinux_Type:Sensitivity_Level\fR\fR
+.ad
+.sp .6
+.RS 4n
+This flag sets the SELinux context for the filesytem being mounted. See \fBselinux\fR(8) for more information.
+.RE
+
+.sp
+.ne 2
+.mk
+.na
+\fB\fBdefntext\fR=\fBSELinux_User:SElinux_Role:Selinux_Type:Sensitivity_Level\fR\fR
+.ad
+.sp .6
+.RS 4n
+This flag sets the SELinux context for unlabeled files. See \fBselinux\fR(8) for more information.
+.RE
+
.sp
+.ne 2
+.mk
+.na
+\fB\fBrootcontext\fR=\fBSELinux_User:SElinux_Role:Selinux_Type:Sensitivity_Level\fR\fR
+.ad
+.sp .6
+.RS 4n
+This flag sets the SELinux context for the root inode of the filesystem. See \fBselinux\fR(8) for more information.
+.RE
+
+.sp
+.ne 2
+.mk
+.na
+\fB\fBoverlay\fR=\fBon\fR | \fBoff\fR\fR
+.ad
+.sp .6
+.RS 4n
+Allow mounting on a busy directory or a directory which already contains files/directories. This is the default mount behavior for Linux filesystems. However, for consistency with ZFS on other platforms overlay mounts are disabled by default. Set \fBoverlay=on\fR to enable overlay mounts.
+.RE
+
+.SS "Temporary Mount Point Properties"
.LP
When a file system is mounted, either through \fBmount\fR(8) for legacy mounts or the \fBzfs mount\fR command for normal file systems, its mount options are set according to its properties. The correlation between properties and mount options is as follows:
.sp
.LP
In addition, these options can be set on a per-mount basis using the \fB-o\fR option, without affecting the property that is stored on disk. The values specified on the command line override the values stored in the dataset. The \fB-nosuid\fR option is an alias for \fBnodevices,nosetuid\fR. These properties are reported as "temporary" by the \fBzfs get\fR command. If the properties are changed while the dataset is mounted, the new setting overrides any temporary settings.
.SS "User Properties"
-.sp
.LP
In addition to the standard native properties, \fBZFS\fR supports arbitrary user properties. User properties have no effect on \fBZFS\fR behavior, but applications or administrators can use them to annotate datasets (file systems, volumes, and snapshots).
.sp
.LP
The values of user properties are arbitrary strings, are always inherited, and are never validated. All of the commands that operate on properties (\fBzfs list\fR, \fBzfs get\fR, \fBzfs set\fR, and so forth) can be used to manipulate both native properties and user properties. Use the \fBzfs inherit\fR command to clear a user property . If the property is not defined in any parent dataset, it is removed entirely. Property values are limited to 1024 characters.
.SS "ZFS Volumes as Swap"
-.sp
.LP
-Do not swap to a file on a \fBZFS\fR file system. A \fBZFS\fR swap file configuration is not supported.
+\fBZFS\fR volumes may be used as Linux swap devices. After creating the volume
+with the \fBzfs create\fR command set up and enable the swap area using the
+\fBmkswap\fR(8) and \fBswapon\fR(8) commands. Do not swap to a file on a
+\fBZFS\fR file system. A \fBZFS\fR swap file configuration is not supported.
.SH SUBCOMMANDS
-.sp
.LP
All subcommands that modify state are logged persistently to the pool in their original form.
.sp
.ad
.sp .6
.RS 4n
-Recursively destroy all dependents.
+Recursively destroy all clones of these snapshots, including the clones,
+snapshots, and children. If this flag is specified, the \fB-d\fR flag will
+have no effect.
.RE
.sp
.RE
.sp
-Extreme care should be taken when applying either the \fB-r\fR or the \fB-f\fR
+Extreme care should be taken when applying either the \fB-r\fR or the \fB-R\fR
options, as they can destroy large portions of a pool and cause unexpected
behavior for mounted file systems in use.
.RE
.ne 2
.mk
.na
-\fB\fBzfs snapshot\fR [\fB-r\fR] [\fB-o\fR \fIproperty\fR=\fIvalue\fR] ... \fIfilesystem@snapname\fR|\fIvolume@snapname\fR\fR
+\fBzfs destroy\fR \fIfilesystem\fR|\fIvolume\fR#\fIbookmark\fR
.ad
.sp .6
.RS 4n
-Creates a snapshot with the given name. All previous modifications by successful system calls to the file system are part of the snapshot. See the "Snapshots" section for details.
+The given bookmark is destroyed.
+
+.RE
+
+.sp
+.ne 2
+.na
+\fB\fBzfs snapshot\fR [\fB-r\fR] [\fB-o\fR \fIproperty\fR=\fIvalue\fR] ... \fIfilesystem@snapname\fR|\fIvolume@snapname\fR\fR ...
+.ad
+.sp .6
+.RS 4n
+Creates snapshots with the given names. All previous modifications by successful system calls to the file system are part of the snapshots. Snapshots are taken atomically, so that all snapshots correspond to the same moment in time. See the "Snapshots" section for details.
.sp
.ne 2
.mk
.ad
.sp .6
.RS 4n
-Recursively create snapshots of all descendent datasets. Snapshots are taken atomically, so that all recursive snapshots correspond to the same moment in time.
+Recursively create snapshots of all descendent datasets.
.RE
.sp
.ad
.sp .6
.RS 4n
-Roll back the given dataset to a previous snapshot. When a dataset is rolled back, all data that has changed since the snapshot is discarded, and the dataset reverts to the state at the time of the snapshot. By default, the command refuses to roll back to a snapshot other than the most recent one. In order to do so, all intermediate snapshots must be destroyed by specifying the \fB-r\fR option.
+Roll back the given dataset to a previous snapshot. When a dataset is rolled back, all data that has changed since the snapshot is discarded, and the dataset reverts to the state at the time of the snapshot. By default, the command refuses to roll back to a snapshot other than the most recent one. In order to do so, all intermediate snapshots and bookmarks must be destroyed by specifying the \fB-r\fR option.
.sp
-The \fB-rR\fR options do not recursively destroy the child snapshots of a recursive snapshot. Only the top-level recursive snapshot is destroyed by either of these options. To completely roll back a recursive snapshot, you must rollback the individual child snapshots.
+The \fB-rR\fR options do not recursively destroy the child snapshots of a recursive snapshot. Only direct snapshots of the specified filesystem are destroyed by either of these options. To completely roll back a recursive snapshot, you must rollback the individual child snapshots.
.sp
.ne 2
.mk
.ad
.sp .6
.RS 4n
-Recursively destroy any snapshots more recent than the one specified.
+Destroy any snapshots and bookmarks more recent than the one specified.
.RE
.sp
.ad
.sp .6
.RS 4n
-Recursively destroy any more recent snapshots, as well as any clones of those snapshots.
+Recursively destroy any more recent snapshots and bookmarks, as well as any clones of those snapshots.
.RE
.sp
.ne 2
.mk
.na
-\fB\fBzfs\fR \fBlist\fR [\fB-r\fR|\fB-d\fR \fIdepth\fR] [\fB-H\fR] [\fB-o\fR \fIproperty\fR[,\fI\&...\fR]] [ \fB-t\fR \fItype\fR[,\fI\&...\fR]] [ \fB-s\fR \fIproperty\fR ] ... [ \fB-S\fR \fIproperty\fR ] ... [\fIfilesystem\fR|\fIvolume\fR|\fIsnapshot\fR|\fIsnap\fR] ...\fR
+\fB\fBzfs\fR \fBlist\fR [\fB-r\fR|\fB-d\fR \fIdepth\fR] [\fB-Hp\fR] [\fB-o\fR \fIproperty\fR[,\fI\&...\fR]] [ \fB-t\fR \fItype\fR[,\fI\&...\fR]] [ \fB-s\fR \fIproperty\fR ] ... [ \fB-S\fR \fIproperty\fR ] ... [\fIfilesystem\fR|\fIvolume\fR|\fIsnapshot\fR] ...\fR
.ad
.sp .6
.RS 4n
-Lists the property information for the given datasets in tabular form. If specified, you can list property information by the absolute pathname or the relative pathname. By default, all file systems and volumes are displayed. Snapshots are displayed if the \fBlistsnaps\fR property is \fBon\fR (the default is \fBoff\fR) . The following fields are displayed, \fBname,used,available,referenced,mountpoint\fR.
+Lists the property information for the given datasets in tabular form. If specified, you can list property information by the absolute pathname or the relative pathname. By default, all file systems and volumes are displayed. Snapshots are displayed if the \fBlistsnaps\fR property is \fBon\fR (the default is \fBoff\fR). When listing hundreds or thousands of snapshots performance can be improved by restricting the output to only the name. In that case, it is recommended to use \fB-o name -s name\fR. The following fields are displayed by default, \fBname,used,available,referenced,mountpoint\fR.
.sp
.ne 2
.mk
Used for scripting mode. Do not print headers and separate fields by a single tab instead of arbitrary white space.
.RE
+.sp
+.ne 2
+.mk
+.na
+\fB\fB-p\fR\fR
+.sp .6
+.RS 4n
+Display numbers in parsable (exact) values.
+.RE
+
.sp
.ne 2
.mk
.ad
.sp .6
.RS 4n
-A comma-separated list of types to display, where \fItype\fR is one of \fBfilesystem\fR, \fBsnapshot\fR , \fBvolume\fR, or \fBall\fR. For example, specifying \fB-t snapshot\fR displays only snapshots.
+A comma-separated list of types to display, where \fItype\fR is one of \fBfilesystem\fR, \fBsnapshot\fR, \fBsnap\fR, \fBvolume\fR, \fBbookmark\fR, or \fBall\fR. For example, specifying \fB-t snapshot\fR displays only snapshots.
.RE
.RE
.sp
.ne 2
-.mk
-.na
+.mk .na
\fB\fBzfs get\fR [\fB-r\fR|\fB-d\fR \fIdepth\fR] [\fB-Hp\fR] [\fB-o\fR \fIfield\fR[,...] [\fB-t\fR \fItype\fR[,...]] [\fB-s\fR \fIsource\fR[,...] "\fIall\fR" | \fIproperty\fR[,...] \fIfilesystem\fR|\fIvolume\fR|\fIsnapshot\fR ...\fR
.ad
.sp .6
All columns are displayed by default, though this can be controlled by using the \fB-o\fR option. This command takes a comma-separated list of properties as described in the "Native Properties" and "User Properties" sections.
.sp
-The special value \fBall\fR can be used to display all properties that apply to the given dataset's type (filesystem, volume, or snapshot).
+The special value \fBall\fR can be used to display all properties that apply to the given dataset's type (filesystem, volume snapshot, or bookmark).
.sp
.ne 2
.mk
.ad
.sp .6
.RS 4n
-Display numbers in parseable (exact) values.
+Display numbers in parsable (exact) values.
.RE
.RE
.ne 2
.mk
.na
-\fB\fBzfs userspace\fR [\fB-niHp\fR] [\fB-o\fR \fIfield\fR[,...]] [\fB-sS\fR \fIfield\fR]... [\fB-t\fR \fItype\fR [,...]] \fIfilesystem\fR | \fIsnapshot\fR\fR
+\fBzfs\fR \fBuserspace\fR [\fB-Hinp\fR] [\fB-o\fR \fIfield\fR[,...]]
+[\fB-s\fR \fIfield\fR] ...
+[\fB-S\fR \fIfield\fR] ...
+[\fB-t\fR \fItype\fR[,...]] \fIfilesystem\fR|\fIsnapshot\fR
.ad
.sp .6
.RS 4n
-Displays space consumed by, and quotas on, each user in the specified filesystem or snapshot. This corresponds to the \fBuserused@\fR\fIuser\fR and \fBuserquota@\fR\fIuser\fR properties.
+Displays space consumed by, and quotas on, each user in the specified
+filesystem or snapshot. This corresponds to the \fBuserused@\fR\fIuser\fR and
+\fBuserquota@\fR\fIuser\fR properties.
.sp
.ne 2
.mk
.ad
.sp .6
.RS 4n
-Use exact (parseable) numeric output.
+Use exact (parsable) numeric output.
.RE
.sp
.ad
.sp .6
.RS 4n
-Display only the specified fields from the following set, \fBtype,name,used,quota\fR.The default is to display all fields.
+Display only the specified fields from the following
+set: \fBtype, name, used, quota\fR. The default is to display all fields.
.RE
.sp
.ad
.sp .6
.RS 4n
-Sort output by this field. The \fIs\fR and \fIS\fR flags may be specified multiple times to sort first by one field, then by another. The default is \fB-s type\fR \fB-s name\fR.
+Sort output by this field. The \fIs\fR and \fIS\fR flags may be specified
+multiple times to sort first by one field, then by another. The default is
+\fB-s type\fR \fB-s name\fR.
.RE
.sp
.ad
.sp .6
.RS 4n
-Print only the specified types from the following set, \fBall,posixuser,smbuser,posixgroup,smbgroup\fR.
-.sp
-The default is \fB-t posixuser,smbuser\fR
-.sp
-The default can be changed to include group types.
+Print only the specified types from the following
+set: \fBall, posixuser, smbuser, posixgroup, smbgroup\fR. The default
+is \fB-t posixuser,smbuser\fR. The default can be changed to include group
+types.
.RE
.sp
.ad
.sp .6
.RS 4n
-Translate SID to POSIX ID. The POSIX ID may be ephemeral if no mapping exists. Normal POSIX interfaces (for example, \fBstat\fR(2), \fBls\fR \fB-l\fR) perform this translation, so the \fB-i\fR option allows the output from \fBzfs userspace\fR to be compared directly with those utilities. However, \fB-i\fR may lead to confusion if some files were created by an SMB user before a SMB-to-POSIX name mapping was established. In such a case, some files are owned by the SMB entity and some by the POSIX entity. However, the \fB-i\fR option will report that the POSIX entity has the total usage and quota for both.
+Translate SID to POSIX ID. The POSIX ID may be ephemeral if no mapping exists.
+Normal POSIX interfaces (for example, \fBstat\fR(2), \fBls\fR \fB-l\fR) perform
+this translation, so the \fB-i\fR option allows the output from \fBzfs
+userspace\fR to be compared directly with those utilities. However, \fB-i\fR
+may lead to confusion if some files were created by an SMB user before a
+SMB-to-POSIX name mapping was established. In such a case, some files will be owned
+by the SMB entity and some by the POSIX entity. However, the \fB-i\fR option
+will report that the POSIX entity has the total usage and quota for both.
.RE
.RE
.ne 2
.mk
.na
-\fB\fBzfs groupspace\fR [\fB-niHp\fR] [\fB-o\fR \fIfield\fR[,...]] [\fB-sS\fR \fIfield\fR]... [\fB-t\fR \fItype\fR [,...]] \fIfilesystem\fR | \fIsnapshot\fR\fR
+\fBzfs\fR \fBgroupspace\fR [\fB-Hinp\fR] [\fB-o\fR \fIfield\fR[,...]]
+[\fB-s\fR \fIfield\fR] ...
+[\fB-S\fR \fIfield\fR] ...
+[\fB-t\fR \fItype\fR[,...]] \fIfilesystem\fR|\fIsnapshot\fR
.ad
.sp .6
.RS 4n
-Displays space consumed by, and quotas on, each group in the specified filesystem or snapshot. This subcommand is identical to \fBzfs userspace\fR, except that the default types to display are \fB-t posixgroup,smbgroup\fR.
-.sp
-.in +2
-.nf
--
-.fi
-.in -2
-.sp
-
+Displays space consumed by, and quotas on, each group in the specified
+filesystem or snapshot. This subcommand is identical to \fBzfs userspace\fR,
+except that the default types to display are \fB-t posixgroup,smbgroup\fR.
.RE
.sp
.ad
.sp .6
.RS 4n
-An optional, comma-separated list of mount options to use temporarily for the duration of the mount. See the "Temporary Mount Point Properties" section for details.
+An optional, comma-separated list of mount options to use temporarily for the
+duration of the mount. See the "Temporary Mount Point Properties" section for
+details.
.RE
.sp
.ad
.sp .6
.RS 4n
-Mount all available \fBZFS\fR file systems. Invoked automatically as part of the boot process.
+Mount all available \fBZFS\fR file systems. Invoked automatically as part of
+the boot process.
.RE
.sp
.ne 2
.mk
.na
-\fBzfs send\fR [\fB-DnPpRrv\fR] [\fB-\fR[\fBiI\fR] \fIsnapshot\fR] \fIsnapshot\fR
+\fB\fBzfs bookmark\fR \fIsnapshot\fR \fIbookmark\fR\fR
+.ad
+.sp .6
+.RS 4n
+Creates a bookmark of the given snapshot. Bookmarks mark the point in time
+when the snapshot was created, and can be used as the incremental source for
+a \fBzfs send\fR command.
+.sp
+This feature must be enabled to be used.
+See \fBzpool-features\fR(5) for details on ZFS feature flags and the
+\fBbookmarks\fR feature.
+.RE
+
+
+.RE
+.sp
+.ne 2
+.na
+\fBzfs send\fR [\fB-DnPpRve\fR] [\fB-\fR[\fBiI\fR] \fIsnapshot\fR] \fIsnapshot\fR
.ad
.sp .6
.RS 4n
.ad
.sp .6
.RS 4n
-Generate an incremental stream from the first \fIsnapshot\fR to the second \fIsnapshot\fR. The incremental source (the first \fIsnapshot\fR) can be specified as the last component of the snapshot name (for example, the part after the \fB@\fR), and it is assumed to be from the same file system as the second \fIsnapshot\fR.
+Generate an incremental stream from the first \fIsnapshot\fR (the incremental source) to the second \fIsnapshot\fR (the incremental target). The incremental source can be specified as the last component of the snapshot name (the \fB@\fR character and following) and it is assumed to be from the same file system as the incremental target.
.sp
If the destination is a clone, the source may be the origin snapshot, which must be fully specified (for example, \fBpool/fs@origin\fR, not just \fB@origin\fR).
.RE
.ad
.sp .6
.RS 4n
-Generate a stream package that sends all intermediary snapshots from the first snapshot to the second snapshot. For example, \fB-I @a fs@d\fR is similar to \fB-i @a fs@b; -i @b fs@c; -i @c fs@d\fR. The incremental source snapshot may be specified as with the \fB-i\fR option.
+Generate a stream package that sends all intermediary snapshots from the first snapshot to the second snapshot. For example, \fB-I @a fs@d\fR is similar to \fB-i @a fs@b; -i @b fs@c; -i @c fs@d\fR. The incremental source may be specified as with the \fB-i\fR option.
.RE
.sp
.ne 2
.mk
.na
-\fB\fB-v\fR\fR
+\fB\fB-R\fR\fR
.ad
.sp .6
.RS 4n
-Print verbose information about the stream package generated. This information
-includes a per-second report of how much data has been sent.
+Generate a replication stream package, which will replicate the specified filesystem, and all descendent file systems, up to the named snapshot. When received, all properties, snapshots, descendent file systems, and clones are preserved.
+.sp
+If the \fB-i\fR or \fB-I\fR flags are used in conjunction with the \fB-R\fR flag, an incremental replication stream is generated. The current values of properties, and current snapshot and file system names are set when the stream is received. If the \fB-F\fR flag is specified when this stream is received, snapshots and file systems that do not exist on the sending side are destroyed.
.RE
.sp
.ne 2
.mk
.na
-\fB\fB-R\fR\fR
+\fB\fB-D\fR\fR
.ad
.sp .6
.RS 4n
-Generate a replication stream package, which will replicate the specified filesystem, and all descendent file systems, up to the named snapshot. When received, all properties, snapshots, descendent file systems, and clones are preserved.
-.sp
-If the \fB-i\fR or \fB-I\fR flags are used in conjunction with the \fB-R\fR flag, an incremental replication stream is generated. The current values of properties, and current snapshot and file system names are set when the stream is received. If the \fB-F\fR flag is specified when this stream is received, snapshots and file systems that do not exist on the sending side are destroyed.
+Generate a deduplicated stream. Blocks which would have been sent multiple times in the send stream will only be sent once. The receiving system must also support this feature to receive a deduplicated stream. This flag can be used regardless of the dataset's dedup property, but performance will be much better if the filesystem uses a dedup-capable checksum (eg. sha256).
.RE
.sp
.ne 2
.mk
.na
-\fB\fB-D\fR\fR
+\fB\fB-e\fR\fR
.ad
.sp .6
.RS 4n
-This option will cause dedup processing to be performed on the data being written to a send stream. Dedup processing is optional because it isn't always appropriate (some kinds of data have very little duplication) and it has significant costs: the checksumming required to detect duplicate blocks is CPU-intensive and the data that must be maintained while the stream is being processed can occupy a very large amount of memory.
-.sp
-Duplicate blocks are detected by calculating a cryptographically strong checksum on each data block. Blocks that have the same checksum are presumed to be identical. The checksum type used at this time is SHA256. However, the stream format contains a field which identifies the checksum type, permitting other checksums to be used in the future.
+Generate a more compact stream by using WRITE_EMBEDDED records for blocks
+which are stored more compactly on disk by the \fBembedded_data\fR pool
+feature. This flag has no effect if the \fBembedded_data\fR feature is
+disabled. The receiving system must have the \fBembedded_data\fR feature
+enabled. If the \fBlz4_compress\fR feature is active on the sending system,
+then the receiving system must have that feature enabled as well. See
+\fBzpool-features\fR(5) for details on ZFS feature flags and the
+\fBembedded_data\fR feature.
.RE
.sp
.ne 2
-.mk
.na
\fB\fB-p\fR\fR
.ad
.sp .6
.RS 4n
-Include properties in the send stream without the -R option.
-.RE
-
-The format of the stream is committed. You will be able to receive your streams on future versions of \fBZFS\fR.
+Include the dataset's properties in the stream. This flag is implicit when -R is specified. The receiving system must also support this feature.
.RE
.sp
.ne 2
-.mk
.na
-\fB\fBzfs receive\fR [\fB-vnFu\fR] \fIfilesystem\fR|\fIvolume\fR|\fIsnapshot\fR\fR
+\fB\fB-n\fR\fR
.ad
-.br
+.sp .6
+.RS 4n
+Do a dry-run ("No-op") send. Do not generate any actual send data. This is
+useful in conjunction with the \fB-v\fR or \fB-P\fR flags to determine what
+data will be sent.
+.RE
+
+.sp
+.ne 2
.na
-\fB\fBzfs receive\fR [\fB-vnFu\fR] [\fB-d\fR|\fB-e\fR] \fIfilesystem\fR\fR
+\fB\fB-P\fR\fR
.ad
.sp .6
.RS 4n
-Creates a snapshot whose contents are as specified in the stream provided on standard input. If a full stream is received, then a new file system is created as well. Streams are created using the \fBzfs send\fR subcommand, which by default creates a full stream. \fBzfs recv\fR can be used as an alias for \fBzfs receive\fR.
-.sp
-If an incremental stream is received, then the destination file system must already exist, and its most recent snapshot must match the incremental stream's source. For \fBzvols\fR, the destination device link is destroyed and recreated, which means the \fBzvol\fR cannot be accessed during the \fBreceive\fR operation.
-.sp
-When a snapshot replication package stream that is generated by using the \fBzfs send\fR \fB-R\fR command is received, any snapshots that do not exist on the sending location are destroyed by using the \fBzfs destroy\fR \fB-d\fR command.
-.sp
-The name of the snapshot (and file system, if a full stream is received) that this subcommand creates depends on the argument type and the use of the \fB-d\fR or \fB-e\fR options.
-.sp
-If the argument is a snapshot name, the specified \fIsnapshot\fR is created. If the argument is a file system or volume name, a snapshot with the same name as the sent snapshot is created within the specified \fIfilesystem\fR or \fIvolume\fR. If neither of the \fB-d\fR or \fB-e\fR options are specified, the provided target snapshot name is used exactly as provided.
-.sp
-The \fB-d\fR and \fB-e\fR options cause the file system name of the target snapshot to be determined by appending a portion of the sent snapshot's name to the specified target \fIfilesystem\fR. If the \fB-d\fR option is specified, all but the first element of the sent snapshot's file system path (usually the pool name) is used and any required intermediate file systems within the specified one are created. If the \fB-e\fR option is specified, then only the last element of the sent snapshot's file system name (i.e. the name of the source file system itself) is used as the target file system name.
+Print machine-parsable verbose information about the stream package generated.
+.RE
+
.sp
.ne 2
.mk
.na
-\fB\fB-d\fR\fR
+\fB\fB-v\fR\fR
.ad
.sp .6
.RS 4n
-Discard the first element of the sent snapshot's file system name, using the remaining elements to determine the name of the target file system for the new snapshot as described in the paragraph above.
+Print verbose information about the stream package generated. This information
+includes a per-second report of how much data has been sent.
.RE
+The format of the stream is committed. You will be able to receive your streams on future versions of \fBZFS\fR.
+.RE
+
+.RE
.sp
.ne 2
.na
-\fB\fB-e\fR\fR
+\fBzfs send\fR [\fB-e\fR] [\fB-i\fR \fIsnapshot\fR|\fIbookmark\fR] \fIfilesystem\fR|\fIvolume\fR|\fIsnapshot\fR
.ad
.sp .6
.RS 4n
-Discard all but the last element of the sent snapshot's file system name, using that element to determine the name of the target file system for the new snapshot as described in the paragraph above.
-.RE
+Generate a send stream, which may be of a filesystem, and may be
+incremental from a bookmark. If the destination is a filesystem or volume,
+the pool must be read-only, or the filesystem must not be mounted. When the
+stream generated from a filesystem or volume is received, the default snapshot
+name will be "--head--".
.sp
.ne 2
-.mk
.na
-\fB\fB-u\fR\fR
+\fB-i\fR \fIsnapshot\fR|\fIbookmark\fR
.ad
.sp .6
.RS 4n
-File system that is associated with the received stream is not mounted.
+Generate an incremental send stream. The incremental source must be an earlier
+snapshot in the destination's history. It will commonly be an earlier
+snapshot in the destination's filesystem, in which case it can be
+specified as the last component of the name (the \fB#\fR or \fB@\fR character
+and following).
+.sp
+If the incremental target is a clone, the incremental source can
+be the origin snapshot, or an earlier snapshot in the origin's filesystem,
+or the origin's origin, etc.
.RE
.sp
.ne 2
.mk
.na
-\fB\fB-D\fR\fR
+\fB\fB-e\fR\fR
.ad
.sp .6
.RS 4n
-Generate a deduplicated stream. Blocks which would have been sent multiple
-times in the send stream will only be sent once. The receiving system must
-also support this feature to recieve a deduplicated stream. This flag can
-be used regardless of the dataset's \fBdedup\fR property, but performance
-will be much better if the filesystem uses a dedup-capable checksum (eg.
-\fBsha256\fR).
+Generate a more compact stream by using WRITE_EMBEDDED records for blocks
+which are stored more compactly on disk by the \fBembedded_data\fR pool
+feature. This flag has no effect if the \fBembedded_data\fR feature is
+disabled. The receiving system must have the \fBembedded_data\fR feature
+enabled. If the \fBlz4_compress\fR feature is active on the sending system,
+then the receiving system must have that feature enabled as well. See
+\fBzpool-features\fR(5) for details on ZFS feature flags and the
+\fBembedded_data\fR feature.
.RE
+.RE
.sp
.ne 2
+.mk
.na
-\fB\fB-r\fR\fR
+\fB\fBzfs receive\fR [\fB-vnFu\fR] \fIfilesystem\fR|\fIvolume\fR|\fIsnapshot\fR\fR
+.ad
+.br
+.na
+\fB\fBzfs receive\fR [\fB-vnFu\fR] [\fB-d\fR|\fB-e\fR] \fIfilesystem\fR\fR
.ad
.sp .6
.RS 4n
-Recursively send all descendant snapshots. This is similar to the \fB-R\fR
-flag, but information about deleted and renamed datasets is not included, and
-property information is only included if the \fB-p\fR flag is specified.
-.RE
-
+Creates a snapshot whose contents are as specified in the stream provided on standard input. If a full stream is received, then a new file system is created as well. Streams are created using the \fBzfs send\fR subcommand, which by default creates a full stream. \fBzfs recv\fR can be used as an alias for \fBzfs receive\fR.
+.sp
+If an incremental stream is received, then the destination file system must already exist, and its most recent snapshot must match the incremental stream's source. For \fBzvols\fR, the destination device link is destroyed and recreated, which means the \fBzvol\fR cannot be accessed during the \fBreceive\fR operation.
+.sp
+When a snapshot replication package stream that is generated by using the \fBzfs send\fR \fB-R\fR command is received, any snapshots that do not exist on the sending location are destroyed by using the \fBzfs destroy\fR \fB-d\fR command.
+.sp
+The name of the snapshot (and file system, if a full stream is received) that this subcommand creates depends on the argument type and the use of the \fB-d\fR or \fB-e\fR options.
+.sp
+If the argument is a snapshot name, the specified \fIsnapshot\fR is created. If the argument is a file system or volume name, a snapshot with the same name as the sent snapshot is created within the specified \fIfilesystem\fR or \fIvolume\fR. If neither of the \fB-d\fR or \fB-e\fR options are specified, the provided target snapshot name is used exactly as provided.
+.sp
+The \fB-d\fR and \fB-e\fR options cause the file system name of the target snapshot to be determined by appending a portion of the sent snapshot's name to the specified target \fIfilesystem\fR. If the \fB-d\fR option is specified, all but the first element of the sent snapshot's file system path (usually the pool name) is used and any required intermediate file systems within the specified one are created. If the \fB-e\fR option is specified, then only the last element of the sent snapshot's file system name (i.e. the name of the source file system itself) is used as the target file system name.
.sp
.ne 2
+.mk
.na
-\fB\fB-p\fR\fR
+\fB\fB-d\fR\fR
.ad
.sp .6
.RS 4n
-Include the dataset's properties in the stream. This flag is implicit when
-\fB-R\fR is specified. The receiving system must also support this feature.
+Discard the first element of the sent snapshot's file system name, using the remaining elements to determine the name of the target file system for the new snapshot as described in the paragraph above.
.RE
+
.sp
.ne 2
.na
-\fB\fB-n\fR\fR
+\fB\fB-e\fR\fR
.ad
.sp .6
.RS 4n
-Do a dry-run ("No-op") send. Do not generate any actual send data. This is
-useful in conjunction with the \fB-v\fR or \fB-P\fR flags to determine what
-data will be sent.
+Discard all but the last element of the sent snapshot's file system name, using that element to determine the name of the target file system for the new snapshot as described in the paragraph above.
.RE
.sp
.ne 2
+.mk
.na
-\fB\fB-P\fR\fR
+\fB\fB-u\fR\fR
.ad
.sp .6
.RS 4n
-Print machine-parsable verbose information about the stream package generated.
+File system that is associated with the received stream is not mounted.
.RE
.sp
Force a rollback of the file system to the most recent snapshot before performing the receive operation. If receiving an incremental replication stream (for example, one generated by \fBzfs send -R -[iI]\fR), destroy snapshots and file systems that do not exist on the sending side.
.RE
-.RE
-
.sp
.ne 2
.mk
userquota other Allows accessing any userquota@... property
userused other Allows reading any userused@... property
+acltype property
aclinherit property
-aclmode property
atime property
canmount property
casesensitivity property
checksum property
compression property
copies property
+dedup property
devices property
exec property
+logbias property
+mlslabel property
mountpoint property
nbmand property
normalization property
.ad
.sp .6
.RS 4n
-Give more parseable tab-separated output, without header lines and without arrows.
+Give more parsable tab-separated output, without header lines and without arrows.
.RE
.sp
.ne 2
pool/home/bob readonly off default
pool/home/bob zoned off default
pool/home/bob snapdir hidden default
-pool/home/bob aclmode groupmask default
+pool/home/bob acltype off default
pool/home/bob aclinherit restricted default
pool/home/bob canmount on default
pool/home/bob shareiscsi off default
pool/home/bob usedbydataset 21K -
pool/home/bob usedbychildren 0 -
pool/home/bob usedbyrefreservation 0 -
+pool/home/bob logbias latency default
+pool/home/bob dedup off default
+pool/home/bob mlslabel none default
+pool/home/bob relatime off default
.fi
.in -2
.sp
# \fBzfs destroy -r pool/users@7daysago\fR
# \fBzfs rename -r pool/users@6daysago @7daysago\fR
# \fBzfs rename -r pool/users@5daysago @6daysago\fR
-# \fBzfs rename -r pool/users@yesterday @5daysago\fR
-# \fBzfs rename -r pool/users@yesterday @4daysago\fR
-# \fBzfs rename -r pool/users@yesterday @3daysago\fR
+# \fBzfs rename -r pool/users@4daysago @5daysago\fR
+# \fBzfs rename -r pool/users@3daysago @4daysago\fR
+# \fBzfs rename -r pool/users@2daysago @3daysago\fR
# \fBzfs rename -r pool/users@yesterday @2daysago\fR
# \fBzfs rename -r pool/users@today @yesterday\fR
# \fBzfs snapshot -r pool/users@today\fR
.in -2
.sp
-.SH EXIT STATUS
+.LP
+\fBExample 24\fR Creating a bookmark
+.sp
+.LP
+The following example create a bookmark to a snapshot. This bookmark can then
+be used instead of snapshot in send streams.
+
.sp
+.in +2
+.nf
+# zfs bookmark rpool@snapshot rpool#bookmark
+.fi
+.in -2
+.sp
+
+.SH "ENVIRONMENT VARIABLES"
+.TP
+.B "ZFS_ABORT
+Cause \fBzfs\fR to dump core on exit for the purposes of running \fB::findleaks\fR.
+
+.SH EXIT STATUS
.LP
The following exit values are returned:
.sp
.RE
.SH SEE ALSO
-.sp
.LP
\fBchmod\fR(2), \fBfsync\fR(2), \fBgzip\fR(1), \fBmount\fR(8), \fBssh\fR(1), \fBstat\fR(2), \fBwrite\fR(2), \fBzpool\fR(8)
projects / mirror_zfs-debian.git / blobdiff