[hobbit] Clarification: Change graphing on Trends link

Ralph Mitchell ralphmitchell at gmail.com
Tue Jan 31 08:13:10 CET 2006

I don't know if that could be done in a config file, but it certainly
can be done by altering the source.  Take a look at
hobbitd/hobbitgraph.c.  Near the top there's a bunch of defines that
tell rrdtool how to select the data:

   #define HOUR_GRAPH  "e-48h"
   #define DAY_GRAPH   "e-12d"
   #define WEEK_GRAPH  "e-48d"
   #define MONTH_GRAPH "e-576d"

"e-48h" means "end-of-data minus 48 hours", which is the start of the
range, the end of the range being the end of the data.  Change those
numbers to whatever suits you best - i.e.  e-24h, e-7d, e-30d &

You'll also want to look further down for blocks like this:

     if (strcmp(val, "hourly") == 0) {
                   period = HOUR_GRAPH;
                   persecs = 48*60*60;
                   gtype = strdup(val);
                   glegend = "Last 48 Hours";

and fix those up.  I guess that would be:

                   persecs = 24*60*60;
                   glegend = "Last 24 Hours";

for the 24 hour graph.  Similarly for DAY_GRAPH, WEEK_GRAPH &
MONTH_GRAPH.  Go back up to the main source directory and re-run make,
then copy hobbitd/hobbitgraph.cgi over to hobbit's server/bin

Seems to work fine for me - I might even keep it like this... :)

Ralph Mitchell

On 1/30/06, David Gilmore <david at stenhouseconsulting.com> wrote:
> I should have been a clearer in my post here.  When clicking on the graph in
> the Trends page, is there a way to change the default historical times?
> Instead of 48 hrs, 12 days, 48 days, and 576 days, can the graphs be set to
> 24 hrs, 7 days, 30 days, 365 days?
> Thanks,
> Dave

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