Changeset 286 for branches/samba-3.0/docs/manpages/vfs_commit.8
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- Jun 24, 2009, 5:09:21 PM (16 years ago)
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branches/samba-3.0/docs/manpages/vfs_commit.8
r158 r286 1 1 .\" Title: vfs_commit 2 .\" Author: 3 .\" Generator: DocBook XSL Stylesheets v1.7 3.2<http://docbook.sf.net/>4 .\" Date: 0 8/25/20082 .\" Author: [see the "AUTHOR" section] 3 .\" Generator: DocBook XSL Stylesheets v1.74.0 <http://docbook.sf.net/> 4 .\" Date: 06/22/2009 5 5 .\" Manual: System Administration tools 6 6 .\" Source: Samba 3.0 7 .\" Language: English 7 8 .\" 8 .TH "VFS_COMMIT" "8" "08/25/2008" "Samba 3\.0" "System Administration tools" 9 .TH "VFS_COMMIT" "8" "06/22/2009" "Samba 3\&.0" "System Administration tools" 10 .\" ----------------------------------------------------------------- 11 .\" * (re)Define some macros 12 .\" ----------------------------------------------------------------- 13 .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 14 .\" toupper - uppercase a string (locale-aware) 15 .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 16 .de toupper 17 .tr aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ 18 \\$* 19 .tr aabbccddeeffgghhiijjkkllmmnnooppqqrrssttuuvvwwxxyyzz 20 .. 21 .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 22 .\" SH-xref - format a cross-reference to an SH section 23 .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 24 .de SH-xref 25 .ie n \{\ 26 .\} 27 .toupper \\$* 28 .el \{\ 29 \\$* 30 .\} 31 .. 32 .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 33 .\" SH - level-one heading that works better for non-TTY output 34 .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 35 .de1 SH 36 .\" put an extra blank line of space above the head in non-TTY output 37 .if t \{\ 38 .sp 1 39 .\} 40 .sp \\n[PD]u 41 .nr an-level 1 42 .set-an-margin 43 .nr an-prevailing-indent \\n[IN] 44 .fi 45 .in \\n[an-margin]u 46 .ti 0 47 .HTML-TAG ".NH \\n[an-level]" 48 .it 1 an-trap 49 .nr an-no-space-flag 1 50 .nr an-break-flag 1 51 \." make the size of the head bigger 52 .ps +3 53 .ft B 54 .ne (2v + 1u) 55 .ie n \{\ 56 .\" if n (TTY output), use uppercase 57 .toupper \\$* 58 .\} 59 .el \{\ 60 .nr an-break-flag 0 61 .\" if not n (not TTY), use normal case (not uppercase) 62 \\$1 63 .in \\n[an-margin]u 64 .ti 0 65 .\" if not n (not TTY), put a border/line under subheading 66 .sp -.6 67 \l'\n(.lu' 68 .\} 69 .. 70 .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 71 .\" SS - level-two heading that works better for non-TTY output 72 .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 73 .de1 SS 74 .sp \\n[PD]u 75 .nr an-level 1 76 .set-an-margin 77 .nr an-prevailing-indent \\n[IN] 78 .fi 79 .in \\n[IN]u 80 .ti \\n[SN]u 81 .it 1 an-trap 82 .nr an-no-space-flag 1 83 .nr an-break-flag 1 84 .ps \\n[PS-SS]u 85 \." make the size of the head bigger 86 .ps +2 87 .ft B 88 .ne (2v + 1u) 89 .if \\n[.$] \&\\$* 90 .. 91 .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 92 .\" BB/BE - put background/screen (filled box) around block of text 93 .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 94 .de BB 95 .if t \{\ 96 .sp -.5 97 .br 98 .in +2n 99 .ll -2n 100 .gcolor red 101 .di BX 102 .\} 103 .. 104 .de EB 105 .if t \{\ 106 .if "\\$2"adjust-for-leading-newline" \{\ 107 .sp -1 108 .\} 109 .br 110 .di 111 .in 112 .ll 113 .gcolor 114 .nr BW \\n(.lu-\\n(.i 115 .nr BH \\n(dn+.5v 116 .ne \\n(BHu+.5v 117 .ie "\\$2"adjust-for-leading-newline" \{\ 118 \M[\\$1]\h'1n'\v'+.5v'\D'P \\n(BWu 0 0 \\n(BHu -\\n(BWu 0 0 -\\n(BHu'\M[] 119 .\} 120 .el \{\ 121 \M[\\$1]\h'1n'\v'-.5v'\D'P \\n(BWu 0 0 \\n(BHu -\\n(BWu 0 0 -\\n(BHu'\M[] 122 .\} 123 .in 0 124 .sp -.5v 125 .nf 126 .BX 127 .in 128 .sp .5v 129 .fi 130 .\} 131 .. 132 .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 133 .\" BM/EM - put colored marker in margin next to block of text 134 .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 135 .de BM 136 .if t \{\ 137 .br 138 .ll -2n 139 .gcolor red 140 .di BX 141 .\} 142 .. 143 .de EM 144 .if t \{\ 145 .br 146 .di 147 .ll 148 .gcolor 149 .nr BH \\n(dn 150 .ne \\n(BHu 151 \M[\\$1]\D'P -.75n 0 0 \\n(BHu -(\\n[.i]u - \\n(INu - .75n) 0 0 -\\n(BHu'\M[] 152 .in 0 153 .nf 154 .BX 155 .in 156 .fi 157 .\} 158 .. 159 .\" ----------------------------------------------------------------- 160 .\" * set default formatting 161 .\" ----------------------------------------------------------------- 9 162 .\" disable hyphenation 10 163 .nh 11 164 .\" disable justification (adjust text to left margin only) 12 165 .ad l 13 .SH "NAME" 14 vfs_commit - flush dirty data at specified intervals 15 .SH "SYNOPSIS" 16 .HP 1 17 vfs objects = commit 166 .\" ----------------------------------------------------------------- 167 .\" * MAIN CONTENT STARTS HERE * 168 .\" ----------------------------------------------------------------- 169 .SH "Name" 170 vfs_commit \- flush dirty data at specified intervals 171 .SH "Synopsis" 172 .fam C 173 .HP \w'\ 'u 174 \FCvfs objects = commit\F[] 175 .fam 18 176 .SH "DESCRIPTION" 19 177 .PP 20 178 This VFS module is part of the 21 179 \fBsamba\fR(7) 22 suite\ .180 suite\&. 23 181 .PP 24 182 The 25 vfs_commit 26 VFS module keeps track of the amount of data written to a file and synchronizes it to disk when a specified amount accumulates\ .27 .PP 28 vfs_commit 29 is useful in two circumstances\ . First, if you have very precious data, the impact of unexpected power loss can be minimized by a small commit:dthresh value\. Secondly, write performance can be improved on some systems by flushing file data early and at regular intervals\.30 .PP 31 This module is stackable\ .183 \FCvfs_commit\F[] 184 VFS module keeps track of the amount of data written to a file and synchronizes it to disk when a specified amount accumulates\&. 185 .PP 186 \FCvfs_commit\F[] 187 is useful in two circumstances\&. First, if you have very precious data, the impact of unexpected power loss can be minimized by a small commit:dthresh value\&. Secondly, write performance can be improved on some systems by flushing file data early and at regular intervals\&. 188 .PP 189 This module is stackable\&. 32 190 .SH "OPTIONS" 33 191 .PP 34 192 commit:dthresh = BYTES 35 193 .RS 4 36 Synchronize file data each time the specified number of bytes has been written\ .194 Synchronize file data each time the specified number of bytes has been written\&. 37 195 .sp 38 196 The following suffixes may be applied to BYTES: … … 46 204 .IP \(bu 2.3 47 205 .\} 48 K 206 \FCK\F[] 49 207 \- BYTES is a number of kilobytes 50 208 .RE … … 58 216 .IP \(bu 2.3 59 217 .\} 60 M 218 \FCM\F[] 61 219 \- BYTES is a number of megabytes 62 220 .RE … … 70 228 .IP \(bu 2.3 71 229 .\} 72 G 230 \FCG\F[] 73 231 \- BYTES is a number of gigabytes 74 232 .sp … … 79 237 Synchronize the file data on the [precious] share after every 512 kilobytes (524288 bytes) of data is written: 80 238 .sp 81 .RS 4 239 .if n \{\ 240 .RS 4 241 .\} 242 .fam C 243 .ps -1 82 244 .nf 245 .if t \{\ 246 .sp -1 247 .\} 248 .BB lightgray adjust-for-leading-newline 249 .sp -1 250 83 251 \fI[precious]\fR 84 \fIpath = /data/precious\fR 85 \fIvfs objects = commit\fR 86 \fIcommit:dthresh = 512K\fR 87 .fi 88 .RE 252 \m[blue]\fBpath = /data/precious\fR\m[] 253 \m[blue]\fBvfs objects = commit\fR\m[] 254 \m[blue]\fBcommit:dthresh = 512K\fR\m[] 255 .EB lightgray adjust-for-leading-newline 256 .if t \{\ 257 .sp 1 258 .\} 259 .fi 260 .fam 261 .ps +1 262 .if n \{\ 263 .RE 264 .\} 89 265 .SH "CAVEATS" 90 266 .PP 91 267 On some systems, the data synchronization performed by 92 commit 93 may reduce performance\ .268 \FCcommit\F[] 269 may reduce performance\&. 94 270 .SH "VERSION" 95 271 .PP 96 This man page is correct for version 3\ .0\.25 of the Samba suite\.272 This man page is correct for version 3\&.0\&.25 of the Samba suite\&. 97 273 .SH "AUTHOR" 98 274 .PP 99 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\.275 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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