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
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 oldest rows.
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
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 another
Alex van den Bogaerdt <email@example.com>
1.7.0 2018-06-30 RRDRESIZE(1)