Comments for Circles of Archimedes

Comment on Rules, Legends and Scales with RRDTool by RRDTool Legend Formatting | Hudson Informatics

RRDTool Legend Formatting | Hudson Informatics — Tue, 13 Sep 2011 20:28:56 +0000

[...] http://wiki.springsurprise.com/2010/10/14/rules-legends-and-scales-with-rrdtool http://www.semicomplete.com/blog/geekery/rrdtool-for-the-win.html [...]

Comment on Rules, Legends and Scales with RRDTool by John Austin

John Austin — Fri, 08 Jul 2011 00:11:35 +0000

First rate articles. I’d never seen a trend line on an RRD graph and I intend to look in to adding a rate of growth to the legends of my network graphs. I’ve looked at a lot of different versions of network weathermaps and graphing tools. Your explanations are first rate. If you have the time or inclination the world could use a book about graphing traffic for network managers. I’m not too fond of the only book I can find on-line about processing Netflow data. (Network Flow Analysis on safaribooksonline.com.

Comment on Creating a Round Robin Database with RRDTool by mini

mini — Wed, 22 Jun 2011 06:23:32 +0000

Really helpful post!

Comment on RRDTool Example Data by steven

steven — Wed, 22 Jun 2011 05:03:25 +0000

For details on setting up a RRA properly, you should see my earlier post that gives a deeper explanation of the various components that make up a RRA definition. The relevant section is under "Round Robin Archive Definition".

Comment on RRDTool Example Data by mini

mini — Tue, 21 Jun 2011 13:24:01 +0000

Thanks for the reply.

Can I know more about xff factor? My requirement is as follows:

step:300
heartbeat:600
Archive:1 month data which should be either 1 or 0.

Say if i receive data at 4 th minute, i want it be stored as only 0 or 1 and not anything in between. I have tried various combination but could not succeed.Please help…

Comment on Using VDEFs for set calculations in RRDTool by steven

steven — Fri, 20 May 2011 04:30:30 +0000

I’m not entirely certain what you’re trying to do here, but I’ll take my best shot at interpreting your request.

I think what you’re after is something similar to Example 3 with the addition of the trendline extending out 6 hours into the future. If this is the case, then it is only a simple modification of that example that can give you what you want. To extend the trendline out into the future, modify the --end parameter to extend to the future time. In your case, this can be achieved by specifying --end=now+6h. While no data points will be graphed (as there shouldn’t be any in the future), the calculated trendline should still extend into the future time.

Here’s a sample illustration of a disk temperature graph I’ve tweaked to illustrate this:

http://wiki.springsurprise.com/wp-content/uploads/2011/05/temp-example.png

Comment on Using VDEFs for set calculations in RRDTool by Stephen

Stephen — Tue, 17 May 2011 16:00:30 +0000

I am graphing a weight variable from a scale.

Grams over time

I am trying to build a graph such that the x axis = the running average and what is graphed on the y axis is the deviations from the running average.
If I can do that, then I would want to build a similiar second graph that allows me to shift that running average 6 hours into the future using predictictive features. Can you help me set this up or show me a sample that does something similiar?
Thank you,
Stephen

Comment on RRDTool Example Data by steven

steven — Mon, 18 Apr 2011 18:12:13 +0000

The are a lot of variables that go into how big the rrd file will be and so there isn’t a simple answer. Here are some of the factors that influence the size:

Number data source (DS) elements in the file
Number of archive (RRA) elements specified
Number of data points specified for each RRA

In general, it’s probably easier to simply create a RRD with the number of data sources and archives that you would like to use and see how big the resulting file is. Because the file will be fully pre-allocated, it will not grow beyond the size it is when first created. (i.e. it doesn’t matter how much data you stuff in it afterwards; the data file size will be constant) As a reference, the size of the file used in the examples is ~3MB.

Comment on RRDTool Example Data by mini

mini — Mon, 18 Apr 2011 10:06:30 +0000

Hello,

Can you please let me know how can I calculate the required disk space for rrd file?

–
Mini

Comment on Installing Bugzilla on Mac OS X Server by Brian Winters

Brian Winters — Sun, 27 Mar 2011 20:40:35 +0000

I finally found the fix and wanted to share in case others ran across this same problem.

ln -s /usr/local/mysql/lib/libmysqlclient.18.dylib /usr/local/lib/libmysqlclient.18.dylib