Changeset 411 for branches/samba-3.3.x/docs/manpages/vfs_cacheprime.8
- Timestamp:
- Mar 1, 2010, 3:05:48 PM (15 years ago)
- File:
-
- 1 edited
Legend:
- Unmodified
- Added
- Removed
-
branches/samba-3.3.x/docs/manpages/vfs_cacheprime.8
r368 r411 1 '\" t2 1 .\" Title: vfs_cacheprime 3 2 .\" Author: [see the "AUTHOR" section] 4 .\" Generator: DocBook XSL Stylesheets v1.7 5.2<http://docbook.sf.net/>5 .\" Date: 0 1/14/20103 .\" Generator: DocBook XSL Stylesheets v1.74.0 <http://docbook.sf.net/> 4 .\" Date: 02/22/2010 6 5 .\" Manual: System Administration tools 7 6 .\" Source: Samba 3.3 8 7 .\" Language: English 9 8 .\" 10 .TH "VFS_CACHEPRIME" "8" "01/14/2010" "Samba 3\&.3" "System Administration tools" 9 .TH "VFS_CACHEPRIME" "8" "02/22/2010" "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 .. 11 159 .\" ----------------------------------------------------------------- 12 160 .\" * set default formatting … … 19 167 .\" * MAIN CONTENT STARTS HERE * 20 168 .\" ----------------------------------------------------------------- 21 .SH "N AME"169 .SH "Name" 22 170 vfs_cacheprime \- prime the kernel file data cache 23 .SH "SYNOPSIS" 171 .SH "Synopsis" 172 .fam C 24 173 .HP \w'\ 'u 25 vfs objects = cacheprime 174 \FCvfs objects = cacheprime\F[] 175 .fam 26 176 .SH "DESCRIPTION" 27 177 .PP … … 31 181 .PP 32 182 The 33 vfs_cacheprime 183 \FCvfs_cacheprime\F[] 34 184 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\&. 35 185 .PP 36 186 The size of the disk read operations performed by 37 vfs_cacheprime 187 \FCvfs_cacheprime\F[] 38 188 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\&. 39 189 .PP … … 55 205 .IP \(bu 2.3 56 206 .\} 57 K 207 \FCK\F[] 58 208 \- BYTES is a number of kilobytes 59 209 .RE … … 67 217 .IP \(bu 2.3 68 218 .\} 69 M 219 \FCM\F[] 70 220 \- BYTES is a number of megabytes 71 221 .RE … … 79 229 .IP \(bu 2.3 80 230 .\} 81 G 231 \FCG\F[] 82 232 \- BYTES is a number of gigabytes 83 233 .sp … … 91 241 .RS 4 92 242 .\} 243 .fam C 244 .ps -1 93 245 .nf 246 .if t \{\ 247 .sp -1 248 .\} 249 .BB lightgray adjust-for-leading-newline 250 .sp -1 251 94 252 \fI[hypothetical]\fR 95 253 \m[blue]\fBvfs objects = cacheprime\fR\m[] 96 254 \m[blue]\fBcacheprime:rsize = 1M\fR\m[] 97 .fi 255 .EB lightgray adjust-for-leading-newline 256 .if t \{\ 257 .sp 1 258 .\} 259 .fi 260 .fam 261 .ps +1 98 262 .if n \{\ 99 263 .RE … … 101 265 .SH "CAVEATS" 102 266 .PP 103 cacheprime 267 \FCcacheprime\F[] 104 268 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)\&. 105 269 .SH "VERSION"
Note:
See TracChangeset
for help on using the changeset viewer.