[rrd-users] Re: how to force update, or undo update

Alex van den Bogaerdt alex at ergens.op.het.net
Tue Feb 7 03:26:17 MET 2006

On Mon, Feb 06, 2006 at 06:16:01PM -0800, Melissa Hao wrote:
> Hi,
> Sometimes I update an rrd but later I change my mind and I'd like to put in another value for that time.  Can I either undo the first update, or force the second update?

Short answer: No.

Long answer: Restore the database file and redo all subsequent updates
except that last one.  Updates MUST be in chronological order.  Timestamps
cannot be the same.
Alternatively, "rrdtool dump", edit the xml file, "rrdtool restore" may
also work.  But be aware in cases where you have more than one RRA: you
need to update all RRAs, chances are you have a hard time understanding
the math (no offense, but given the questions you ask, you're probably
not yet up to it).

Alex van den Bogaerdt

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