CentOS 7.0 - man page for rrdresize (centos section 1)
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RRDRESIZE(1) rrdtool RRDRESIZE(1)
rrdresize - alters the size of an RRA and creates a new .rrd file
rrdtool resize filename rra-num GROW|SHRINK rows
The resize function is used to modify the number of rows in an RRA.
the name of the RRD you want to alter.
rra-num the RRA you want to alter. You can find the number using rrdtool info.
GROW used if you want to add extra rows to an RRA. The extra rows will be inserted as
the rows that are oldest.
SHRINK used if you want to remove rows from an RRA. The rows that will be removed are the
rows the number of rows you want to add or remove.
The new .rrd file, with the modified RRAs, is written to the file resize.rrd in the
current directory. The original .rrd file is not modified.
It is possible to abuse this tool and get strange results by first removing some rows and
then reinserting the same amount (effectively clearing them to be Unknown). You may thus
end up with unknown data in one RRA while at the same timestamp this data is available in
Alex van den Bogaerdt <firstname.lastname@example.org>
1.4.8 2013-05-23 RRDRESIZE(1)
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