[rrd-users] Re: rrdcreate always chooses 16:00:00 PST for start time

[John Reed]

Thanks Benjamin.  That was the missing piece to the puzzle.  I didn't
realize by choosing a 1day step time RRD would write intervals at 16:00
PST(00:00 GMT) instead of creating intervals beginning with my --start time
argument.

John


-----Original Message-----
From: rrd-users-bounce at list.ee.ethz.ch
[mailto:rrd-users-bounce at list.ee.ethz.ch]On Behalf Of R. Benjamin
Kessler
Sent: Friday, November 30, 2001 1:42 PM
To: John Reed; 'RRD'
Subject: [rrd-users] Re: rrdcreate always chooses 16:00:00 PST for start
time



is it a timezone problem?  16:00 PST = 00:00 GMT

-----Original Message-----
From: rrd-users-bounce at list.ee.ethz.ch
[mailto:rrd-users-bounce at list.ee.ethz.ch]On Behalf Of John Reed
Sent: Friday, November 30, 2001 2:24 PM
To: 'RRD'
Subject: [rrd-users] rrdcreate always chooses 16:00:00 PST for start
time



Hello RRDs,

I'm pulling my hair trying to solve this problem.  It seems no matter what
time I choose for --start on a create, the dump file shows my datapoints are
all 16:00:00 PST.  I can hardcode the epoch time or I can let it default to
now-10s, I still get 16:00:00 PST.

Here's the snippet I'm using:

my $midnight = timelocal( 0, 0, 0, (localtime)[3,4,5] );
my $one_year = 60*60*24*365;

RRDs::create( $FILE, '--start', ( $midnight - $one_year - 86400 ),
                     '--step', '86400',
                     'DS:hits_by_date:GAUGE:172800:0:99999999',
                     'RRA:AVERAGE:0.5:1:360',
                     'RRA:AVERAGE:0.5:30:12',
                     'RRA:AVERAGE:0.5:360:10'
             );


And here's a snippit from the dump:
		<database>
			<!-- 1999-12-05 16:00:00 PST / 944438400 --> <row><v> NaN </v></row>
			<!-- 1999-12-06 16:00:00 PST / 944524800 --> <row><v> NaN </v></row>
			<!-- 1999-12-07 16:00:00 PST / 944611200 --> <row><v> NaN </v></row>
			<!-- 1999-12-08 16:00:00 PST / 944697600 --> <row><v> NaN </v></row>


Anyone have any suggestions?  All comments would be greatly appreciated.

Thanks,

John


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