[rrd-users] Re: anti-aliasing rrdtool 1.2 seemingly not working

[Emmett Keyser]

I apologize in advance: this doesn't need to be read. I just want this
message to get archived in the list in case anyone else had this same
issue. I noticed a few posting similar to mine and wanted to let anyone
looking for solutions to know how I solved this problem.

I looked through the cacti source code and found an rrdgraph option of
"--slope-mode". This is the key feature to enable graph smoothing. There
isn't any mention of anti-aliasing in the documentation where it talks
about --slope-mode so now I'm wondering if I know what anti-aliasing is
: ) Oh well. I hope this eventually helps someone out.

Thanks and sorry if anyone considers this excessive posting. Hopefully
this will reduce the amount of future posts. 

Emmett

-----Original Message-----
From: rrd-users-bounce at list.ee.ethz.ch
[mailto:rrd-users-bounce at list.ee.ethz.ch] On Behalf Of Emmett Keyser
Sent: Sunday, November 12, 2006 5:35 PM
To: rrd-users at list.ee.ethz.ch
Subject: [rrd-users] anti-aliasing rrdtool 1.2 seemingly not working


Hello all,
 
It is with some hesitancy that I post to this list because the problem
I'm having seems like it would be pretty common or that I'm not using a
command line switch of some sort. Unfortunately, I've been researching a
solution for some 4 days and have yet to find anything. Hopefully,
someone can point me in the right direction.
 
The problem is straightforward: my graphs aren't being generated with
anti-aliasing. And here's some relevant information:
 
using:
Red Hat Enterprise Linux 4
rrdtool-1.2.15-1
perl-rrdtool-1.2.15-1
 
my latest try has gone the route of manually compiling: rrdtool-1.2.15
libpng-1.2.10 libart_lgpl-2.3.17 freetype-2.1.10
 
Some background:
 
Here is the output to the dependencies for rrdtool (and perl-rrdtool):
 
[root at emmett ~]# rpm -R -ivh --test rrdtool-1.2.15-1.el4.rf.i386.rpm
warning: rrdtool-1.2.15-1.el4.rf.i386.rpm: V3 DSA signature: NOKEY, key
ID 6b8d79e6
error: Failed dependencies:
        perl(RRDp) is needed by rrdtool-1.2.15-1.el4.rf.i386
        perl(RRDs) is needed by rrdtool-1.2.15-1.el4.rf.i386
[root at emmett ~]# rpm -R -ivh --test
perl-rrdtool-1.2.15-1.el4.rf.i386.rpm
warning: perl-rrdtool-1.2.15-1.el4.rf.i386.rpm: V3 DSA signature: NOKEY,
key ID 6b8d79e6
error: Failed dependencies:
        /usr/bin/rrdcgi is needed by perl-rrdtool-1.2.15-1.el4.rf.i386
        librrd.so.2 is needed by perl-rrdtool-1.2.15-1.el4.rf.i386
        rrdtool = 1.2.15 is needed by perl-rrdtool-1.2.15-1.el4.rf.i386
 
But when I try to install both perl-rrdtool and rrdtool at the same time
I don't get any dependency issues - don't know if that's okay or not -
it just seems weird that each depends on the other.
 
Now when I tried the route of manually installing rrdtool I got
dependency issues with libpng, libart, and freetype. This seemed natural
so I downloaded and compiled those packages. I finally tried compiling
rrdtool and ran into a problem with tcl so I did --disable-tcl for the
configuration and it compiled fine.
 
After the manual compile things are the same.
 
My next step is to go through the source code of cacti to see exactly
how the graphs are being generated there in hopes that I'm just missing
a simple switch on the command line for "rrdtool graph" which by the way
is the following:
 
 
/usr/local/rrdtool/bin/rrdtool graph 000d610a8677_cpu01.png
DEF:ds0a=000d610a8677_cpu01.rrd:cpu01:AVERAGE AREA:ds0a#999999:"percent
cpu load\\n" -v "%" -a PNG -l 0 -u 100 -t "PROCESSOR UTILIZATION"  -h
200 -w 600
 
Any help would be greatly appreciated.
 
Thanks
 
Emmett
 
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