| 1 | '\" t
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| 2 | .\" Title: vfs_shadow_copy2
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| 3 | .\" Author: [see the "AUTHOR" section]
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| 4 | .\" Generator: DocBook XSL Stylesheets v1.75.2 <http://docbook.sf.net/>
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| 5 | .\" Date: 08/08/2011
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| 6 | .\" Manual: System Administration tools
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| 7 | .\" Source: Samba 3.6
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| 8 | .\" Language: English
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| 9 | .\"
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| 10 | .TH "VFS_SHADOW_COPY2" "8" "08/08/2011" "Samba 3\&.6" "System Administration tools"
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| 11 | .\" -----------------------------------------------------------------
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| 12 | .\" * set default formatting
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| 13 | .\" -----------------------------------------------------------------
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| 14 | .\" disable hyphenation
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| 15 | .nh
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| 16 | .\" disable justification (adjust text to left margin only)
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| 17 | .ad l
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| 18 | .\" -----------------------------------------------------------------
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| 19 | .\" * MAIN CONTENT STARTS HERE *
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| 20 | .\" -----------------------------------------------------------------
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| 21 | .SH "NAME"
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| 22 | vfs_shadow_copy2 \- Expose snapshots to Windows clients as shadow copies\&.
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| 23 | .SH "SYNOPSIS"
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| 24 | .HP \w'\ 'u
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| 25 | vfs objects = shadow_copy2
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| 26 | .SH "DESCRIPTION"
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| 27 | .PP
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| 28 | This VFS module is part of the
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| 29 | \fBsamba\fR(7)
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| 30 | suite\&.
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| 31 | .PP
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| 32 | The
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| 33 | vfs_shadow_copy2
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| 34 | VFS module functionality that is similar to Microsoft Shadow Copy services\&. When setup properly, this module allows Microsoft Shadow Copy clients to browse "shadow copies" on Samba shares\&.
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| 35 | .PP
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| 36 | This is a 2nd implementation of a shadow copy module\&. This version has the following features:
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| 37 | .sp
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| 38 | .RS 4
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| 39 | .ie n \{\
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| 40 | \h'-04' 1.\h'+01'\c
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| 41 | .\}
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| 42 | .el \{\
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| 43 | .sp -1
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| 44 | .IP " 1." 4.2
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| 45 | .\}
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| 46 | You don\'t need to populate your shares with symlinks to the snapshots\&. This can be very important when you have thousands of shares, or use [homes]\&.
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| 47 | .RE
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| 48 | .sp
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| 49 | .RS 4
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| 50 | .ie n \{\
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| 51 | \h'-04' 2.\h'+01'\c
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| 52 | .\}
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| 53 | .el \{\
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| 54 | .sp -1
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| 55 | .IP " 2." 4.2
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| 56 | .\}
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| 57 | The inode number of the files is altered so it is different from the original\&. This allows the \'restore\' button to work without a sharing violation\&.
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| 58 | .RE
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| 59 | .sp
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| 60 | .RE
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| 61 | .PP
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| 62 | This module is stackable\&.
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| 63 | .SH "CONFIGURATION"
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| 64 | .PP
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| 65 | vfs_shadow_copy2
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| 66 | relies on a filesystem snapshot implementation\&. Many common filesystems have native support for this\&.
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| 67 | .PP
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| 68 | Filesystem snapshots must be mounted on specially named directories in order to be recognized by
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| 69 | vfs_shadow_copy2\&. The snapshot mount points must be immediate children of a the directory being shared\&.
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| 70 | .PP
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| 71 | The snapshot naming convention is @GMT\-YYYY\&.MM\&.DD\-hh\&.mm\&.ss, where:
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| 72 | .sp
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| 73 | .RS 4
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| 74 | .ie n \{\
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| 75 | \h'-04'\(bu\h'+03'\c
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| 76 | .\}
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| 77 | .el \{\
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| 78 | .sp -1
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| 79 | .IP \(bu 2.3
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| 80 | .\}
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| 81 | YYYY
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| 82 | is the 4 digit year
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| 83 | .RE
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| 84 | .sp
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| 85 | .RS 4
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| 86 | .ie n \{\
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| 87 | \h'-04'\(bu\h'+03'\c
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| 88 | .\}
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| 89 | .el \{\
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| 90 | .sp -1
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| 91 | .IP \(bu 2.3
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| 92 | .\}
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| 93 | MM
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| 94 | is the 2 digit month
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| 95 | .RE
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| 96 | .sp
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| 97 | .RS 4
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| 98 | .ie n \{\
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| 99 | \h'-04'\(bu\h'+03'\c
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| 100 | .\}
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| 101 | .el \{\
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| 102 | .sp -1
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| 103 | .IP \(bu 2.3
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| 104 | .\}
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| 105 | DD
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| 106 | is the 2 digit day
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| 107 | .RE
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| 108 | .sp
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| 109 | .RS 4
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| 110 | .ie n \{\
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| 111 | \h'-04'\(bu\h'+03'\c
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| 112 | .\}
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| 113 | .el \{\
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| 114 | .sp -1
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| 115 | .IP \(bu 2.3
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| 116 | .\}
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| 117 | hh
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| 118 | is the 2 digit hour
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| 119 | .RE
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| 120 | .sp
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| 121 | .RS 4
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| 122 | .ie n \{\
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| 123 | \h'-04'\(bu\h'+03'\c
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| 124 | .\}
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| 125 | .el \{\
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| 126 | .sp -1
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| 127 | .IP \(bu 2.3
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| 128 | .\}
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| 129 | mm
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| 130 | is the 2 digit minute
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| 131 | .RE
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| 132 | .sp
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| 133 | .RS 4
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| 134 | .ie n \{\
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| 135 | \h'-04'\(bu\h'+03'\c
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| 136 | .\}
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| 137 | .el \{\
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| 138 | .sp -1
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| 139 | .IP \(bu 2.3
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| 140 | .\}
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| 141 | ss
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| 142 | is the 2 digit second\&.
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| 143 | .RE
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| 144 | .sp
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| 145 | .RE
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| 146 | .PP
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| 147 | The
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| 148 | vfs_shadow_copy2
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| 149 | snapshot naming convention can be produced with the following
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| 150 | \fBdate\fR(1)
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| 151 | command:
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| 152 | .sp
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| 153 | .if n \{\
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| 154 | .RS 4
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| 155 | .\}
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| 156 | .nf
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| 157 | TZ=GMT date +@GMT\-%Y\&.%m\&.%d\-%H\&.%M\&.%S
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| 158 |
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| 159 | .fi
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| 160 | .if n \{\
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| 161 | .RE
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| 162 | .\}
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| 163 | .SH "OPTIONS"
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| 164 | .PP
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| 165 | shadow:snapdir = SNAPDIR
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| 166 | .RS 4
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| 167 | Path to the directory where snapshots are kept\&.
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| 168 | .RE
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| 169 | .PP
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| 170 | shadow:basedir = BASEDIR
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| 171 | .RS 4
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| 172 | Path to the base directory that snapshots are from\&.
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| 173 | .RE
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| 174 | .PP
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| 175 | shadow:sort = asc/desc, or not specified for unsorted (default)
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| 176 | .RS 4
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| 177 | By this parameter one can specify that the shadow copy directories should be sorted before they are sent to the client\&. This can be beneficial as unix filesystems are usually not listed alphabetically sorted\&. If enabled, you typically want to specify descending order\&.
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| 178 | .RE
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| 179 | .PP
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| 180 | shadow:localtime = yes/no
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| 181 | .RS 4
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| 182 | This is an optional parameter that indicates whether the snapshot names are in UTC/GMT or in local time\&. By default UTC is expected\&.
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| 183 | .RE
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| 184 | .PP
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| 185 | shadow:format = format specification for snapshot names
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| 186 | .RS 4
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| 187 | This is an optional parameter that specifies the format specification for the naming of snapshots\&. The format must be compatible with the conversion specifications recognized by str[fp]time\&. The default value is "@GMT\-%Y\&.%m\&.%d\-%H\&.%M\&.%S"\&.
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| 188 | .RE
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| 189 | .PP
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| 190 | shadow:fixinodes = yes/no
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| 191 | .RS 4
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| 192 | If you enable
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| 193 | shadow:fixinodes
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| 194 | then this module will modify the apparent inode number of files in the snapshot directories using a hash of the files path\&. This is needed for snapshot systems where the snapshots have the same device:inode number as the original files (such as happens with GPFS snapshots)\&. If you don\'t set this option then the \'restore\' button in the shadow copy UI will fail with a sharing violation\&.
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| 195 | .RE
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| 196 | .SH "EXAMPLES"
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| 197 | .PP
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| 198 | Add shadow copy support to user home directories:
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| 199 | .sp
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| 200 | .if n \{\
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| 201 | .RS 4
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| 202 | .\}
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| 203 | .nf
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| 204 | \fI[homes]\fR
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| 205 | \m[blue]\fBvfs objects = shadow_copy2\fR\m[]
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| 206 | \m[blue]\fBshadow:snapdir = /data/snaphots\fR\m[]
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| 207 | \m[blue]\fBshadow:basedir = /data/home\fR\m[]
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| 208 | \m[blue]\fBshadow:sort = desc\fR\m[]
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| 209 | .fi
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| 210 | .if n \{\
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| 211 | .RE
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| 212 | .\}
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| 213 | .SH "CAVEATS"
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| 214 | .PP
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| 215 | This is not a backup, archival, or version control solution\&.
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| 216 | .PP
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| 217 | With Samba or Windows servers,
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| 218 | vfs_shadow_copy2
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| 219 | is designed to be an end\-user tool only\&. It does not replace or enhance your backup and archival solutions and should in no way be considered as such\&. Additionally, if you need version control, implement a version control system\&.
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| 220 | .SH "VERSION"
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| 221 | .PP
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| 222 | This man page is correct for version 3\&.2\&.7 of the Samba suite\&.
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| 223 | .SH "AUTHOR"
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| 224 | .PP
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| 225 | 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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