[rrd-users] Re: timezones per graph

John Gmeinder jgmeinder at metlife.com
Mon Feb 7 15:38:13 MET 2000

Thanks Alex, that confirms my suspicions.  But I have a brain-lock on how to
define what you suggested - I am only a few days old on rrd<grin>.

I have an RRA interval of 1 hour.  I then created an RRA to aggregate 12
intervals. Here is my create statement.

rrdtool create ..\data\users.rrd --start "01/31/2000 00:00" --step 3600
DS:allusers:GAUGE:7200:U:U DS:acsusers:GAUGE:7200:U:U
RRA:AVERAGE:0.9999:1:168 RRA:MIN:0.9999:12:120 RRA:MAX:0.9999:12:120

Can you shed a tad bit more light on how to align those aggregates to my
timezone?  Or do I need to dive into CDEFs in order to do this?

Thanks for your time,

John G.

alex at ergens.op.Het.Net on 02/07/2000 08:55:47 AM

To:   John Gmeinder/Bsg/MetLife/US at MetLife
cc:   rrd-users at list.ee.ethz.ch
Subject:  Re: [rrd-users] timezones per graph

John Gmeinder wrote:
> Oops, I see my problem is a bit different.  The problem is not in creating the
> graphs, it is in the aggregate.  When I store a MAX, based on 12 counters, it
> starting at real time 0, not my timezone 0.  What I am looking to do is get
> MAX for my timezone 0-11 (a.m.), and 12-23 (p.m) .  Can I do that, and graph
> based on my timezone?

I assume you're talking about an RRA that stores the data in 12-hour
intervals.  If so:

The first interval will start at 0:00 UTC, the second one at 12:00 UTC.
What you need is an interval that starts at 0:00 in some other timezone.
RRDtool cannot handle this (as it would otherwise need to store CDPs at
arbitrary times such as 5:00 UTC).

The most portable thing to do is to make sure there always is an interval
that starts at 0:00 UTC, for each and every timezone.  That implicates
that you need to use intervals of one hour (assuming that all timezones
are on whole hours; is this correct?)

Doing it this way should allow for averages, maxima etcetera from
your midnight to the next midnight.

 / alex at slot.hollandcasino.nl                  alex at ergens.op.het.net \
| work                                                         private |
| My employer is capable of speaking therefore I speak only for myself |

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