Changeset 368 for branches/samba-3.3.x/docs/manpages/vfs_cacheprime.8
- Timestamp:
- Jan 15, 2010, 8:21:06 AM (16 years ago)
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branches/samba-3.3.x/docs/manpages/vfs_cacheprime.8
r342 r368 1 '\" t 1 2 .\" Title: vfs_cacheprime 2 3 .\" Author: [see the "AUTHOR" section] 3 .\" Generator: DocBook XSL Stylesheets v1.7 4.0<http://docbook.sf.net/>4 .\" Date: 10/12/20094 .\" Generator: DocBook XSL Stylesheets v1.75.2 <http://docbook.sf.net/> 5 .\" Date: 01/14/2010 5 6 .\" Manual: System Administration tools 6 7 .\" Source: Samba 3.3 7 8 .\" Language: English 8 9 .\" 9 .TH "VFS_CACHEPRIME" "8" "10/12/2009" "Samba 3\&.3" "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 .. 10 .TH "VFS_CACHEPRIME" "8" "01/14/2010" "Samba 3\&.3" "System Administration tools" 159 11 .\" ----------------------------------------------------------------- 160 12 .\" * set default formatting … … 167 19 .\" * MAIN CONTENT STARTS HERE * 168 20 .\" ----------------------------------------------------------------- 169 .SH "N ame"21 .SH "NAME" 170 22 vfs_cacheprime \- prime the kernel file data cache 171 .SH "Synopsis" 172 .fam C 23 .SH "SYNOPSIS" 173 24 .HP \w'\ 'u 174 \FCvfs objects = cacheprime\F[] 175 .fam 25 vfs objects = cacheprime 176 26 .SH "DESCRIPTION" 177 27 .PP … … 181 31 .PP 182 32 The 183 \FCvfs_cacheprime\F[] 33 vfs_cacheprime 184 34 VFS module reads chunks of file data near the range requested by clients in order to make sure the data is present in the kernel file data cache at the time when it is actually requested by clients\&. 185 35 .PP 186 36 The size of the disk read operations performed by 187 \FCvfs_cacheprime\F[] 37 vfs_cacheprime 188 38 is determined by the cacheprime:rsize option\&. All disk read operations are aligned on boundaries that are a multiple of this size\&. Each range of the file data is primed at most once during the time the client has the file open\&. 189 39 .PP … … 205 55 .IP \(bu 2.3 206 56 .\} 207 \FCK\F[] 57 K 208 58 \- BYTES is a number of kilobytes 209 59 .RE … … 217 67 .IP \(bu 2.3 218 68 .\} 219 \FCM\F[] 69 M 220 70 \- BYTES is a number of megabytes 221 71 .RE … … 229 79 .IP \(bu 2.3 230 80 .\} 231 \FCG\F[] 81 G 232 82 \- BYTES is a number of gigabytes 233 83 .sp … … 241 91 .RS 4 242 92 .\} 243 .fam C244 .ps -1245 93 .nf 246 .if t \{\247 .sp -1248 .\}249 .BB lightgray adjust-for-leading-newline250 .sp -1251 252 94 \fI[hypothetical]\fR 253 95 \m[blue]\fBvfs objects = cacheprime\fR\m[] 254 96 \m[blue]\fBcacheprime:rsize = 1M\fR\m[] 255 .EB lightgray adjust-for-leading-newline256 .if t \{\257 .sp 1258 .\}259 97 .fi 260 .fam261 .ps +1262 98 .if n \{\ 263 99 .RE … … 265 101 .SH "CAVEATS" 266 102 .PP 267 \FCcacheprime\F[] 103 cacheprime 268 104 is not a a substitute for a general\-purpose readahead mechanism\&. It is intended for use only in very specific environments where disk operations must be aligned and sized to known values (as much as that is possible)\&. 269 105 .SH "VERSION"
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