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124 .\" ========================================================================
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126 .IX Title "RRDRESIZE 1"
127 .TH RRDRESIZE 1 "2009-02-21" "1.3.8" "rrdtool"
128 .\" For nroff, turn off justification. Always turn off hyphenation; it makes
129 .\" way too many mistakes in technical documents.
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131 .nh
132 .SH "NAME"
133 rrdresize \- alters the size of an RRA and creates a new .rrd file
134 .SH "SYNOPSIS"
135 .IX Header "SYNOPSIS"
136 \&\fBrrdtool\fR \fBresize\fR \fIfilename\fR \fIrra-num\fR \fB\s-1GROW\s0\fR\fI|\fR\fB\s-1SHRINK\s0\fR \fIrows\fR
137 .SH "DESCRIPTION"
138 .IX Header "DESCRIPTION"
139 The \fBresize\fR function is used to modify the number of rows in
140 an \fB\s-1RRA\s0\fR.
141 .IP "\fIfilename\fR" 8
142 .IX Item "filename"
143 the name of the \fB\s-1RRD\s0\fR you want to alter.
144 .IP "\fIrra-num\fR" 8
145 .IX Item "rra-num"
146 the \fB\s-1RRA\s0\fR you want to alter. You can find the number using \fBrrdtool info\fR.
147 .IP "\fB\s-1GROW\s0\fR" 8
148 .IX Item "GROW"
149 used if you want to add extra rows to an \s-1RRA\s0. The extra rows will be inserted
150 as the rows that are oldest.
151 .IP "\fB\s-1SHRINK\s0\fR" 8
152 .IX Item "SHRINK"
153 used if you want to remove rows from an \s-1RRA\s0. The rows that will be removed
154 are the oldest rows.
155 .IP "\fIrows\fR" 8
156 .IX Item "rows"
157 the number of rows you want to add or remove.
158 .SH "NOTES"
159 .IX Header "NOTES"
160 The new .rrd file, with the modified RRAs, is written to the file
161 \&\fBresize.rrd\fR in the current directory. \fBThe original .rrd file is not
162 modified\fR.
163 .PP
164 It is possible to abuse this tool and get strange results
165 by first removing some rows and then reinserting the same amount (effectively
166 clearing them to be Unknown). You may thus end up with unknown data in one
167 \&\s-1RRA\s0 while at the same timestamp this data is available in another \s-1RRA\s0.
168 .SH "AUTHOR"
169 .IX Header "AUTHOR"
170 Alex van den Bogaerdt <alex@vandenbogaerdt.nl>