[rrd-users] setting last_update

[Dan Langille]

On 15 Feb 2007 at 16:53, Alex van den Bogaerdt wrote:

> On Thu, Feb 15, 2007 at 10:48:56AM -0500, Dan Langille wrote:
> 
> > > You could try a much more simple case as well:
> > > 
> > > rrdtool create test.rrd DS:x:GAUGE:600:U:U RRA:AVERAGE:0:1:5
> > > rrdtool dump test.rrd
> > 
> > That looks OK
> 
> > # rrdtool dump test.rrd | less
> > <!-- Round Robin Database Dump --><rrd> <version> 0003 </version>
> >         <step> 300 </step> <!-- Seconds -->
> >         <lastupdate> 1171554437 </lastupdate> <!-- 2007-02-15 
> > 07:47:17 PST -->
> 
> 
> Hmmm....
> 
> Try adding "--start=0".  Perhaps it isn't as harmless as it looks.

Well, you are correct:

[dan at supernews:~/tmp] $ rm test.rrd
[dan at supernews:~/tmp] $ rrdtool create test.rrd --start=0 
DS:x:GAUGE:600:U:U RRA:AVERAGE:0:1:5
[dan at supernews:~/tmp] $ rrdtool dump test.rrd  | head
<!-- Round Robin Database Dump --><rrd> <version> 0003 </version>
        <step> 300 </step> <!-- Seconds -->
        <lastupdate> 944503488000 </lastupdate> <!-- 31900-02-15 
00:00:00 PST -->

        <ds>
                <name> x </name>
                <type> GAUGE </type>
                <minimal_heartbeat> 600 </minimal_heartbeat>
                <min> NaN </min>
                <max> NaN </max>
[dan at supernews:~/tmp] $



-- 
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