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'\" t
.\" Title: vfs_btrfs
.\" Author: [see the "AUTHOR" section]
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\" Date: 12/10/2015
.\" Manual: System Administration tools
.\" Source: Samba 4.0
.\" Language: English
.\"
.TH "VFS_BTRFS" "8" "12/10/2015" "Samba 4\&.0" "System Administration tools"
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.SH "NAME"
vfs_btrfs \- Utilize features provided by the Btrfs filesystem
.SH "SYNOPSIS"
.HP \w'\ 'u
vfs objects = btrfs
.SH "DESCRIPTION"
.PP
This VFS module is part of the
\fBsamba\fR(8)
suite\&.
.PP
The
vfs_btrfs
VFS module exposes Btrfs specific features for use by Samba\&.
.PP
Btrfs allows for multiple files to share the same on\-disk data through the use cloned ranges\&. When an SMB client issues a request to copy duplicate data (via FSCTL_SRV_COPYCHUNK), this module maps the request to a Btrfs clone range IOCTL, instead of performing reads and writes required by a traditional copy\&. Doing so saves storage capacity and greatly reduces disk IO\&.
.PP
This module is stackable\&.
.SH "CONFIGURATION"
.PP
vfs_btrfs
requires that the underlying share path is a Btrfs filesystem\&.
.sp
.if n \{\
.RS 4
.\}
.nf
\fI[share]\fR
\m[blue]\fBvfs objects = btrfs\fR\m[]
.fi
.if n \{\
.RE
.\}
.SH "VERSION"
.PP
This man page is correct for version 4\&.1\&.0 of the Samba suite\&.
.SH "AUTHOR"
.PP
The original Samba software and related utilities were created by Andrew Tridgell\&. Samba is now developed by the Samba Team as an Open Source project similar to the way the Linux kernel is developed\&.
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