weathermap evolution

timi · Post by **timi** » Tue Nov 14, 2006 11:09 am

hi, is there a way to see the weathermap evolution in time backwards? not only the traffic graphs ...

Howie · Post by **Howie** » Tue Nov 14, 2006 11:26 am

timi wrote:hi, is there a way to see the weathermap evolution in time backwards? not only the traffic graphs ...

Not from the web interface, but you can do some other things...

http://forums.cacti.net/viewtopic.php?t=14369
and
http://forums.cacti.net/viewtopic.php?p=63684#63684
both have some info.

These are talking about saving copies of the weathermap image to make animations.

To do it by reading old RRD data, you need to make some code changes [you need to change the rrdtool command to say "-s now-86800 -e now-86000" to get 1 day ago, for example ].

This will be a little easier in 0.9, because you can add new data source plugins to get data from other sources. Of course, your RRAs must store data for a longer time to do this, too, or you will get averaged data.

fmangeant · Post by **fmangeant** » Tue Nov 14, 2006 11:32 am

I second this.

If it would be possible to select start and end time/date, and let Weathermap draw the maps (something like 5 minutes = 5 seconds), it would be awesome

timi · Post by **timi** » Tue Nov 14, 2006 11:38 am

0.9 must pe owesome, when do you think it will be released ?

Howie · Post by **Howie** » Tue Nov 14, 2006 11:39 am

fmangeant wrote:I second this.

If it would be possible to select start and end time/date, and let Weathermap draw the maps (something like 5 minutes = 5 seconds), it would be awesome

But how long do you keep 5 minute data for? The default is roughly 1 day... I'm about to extend my own Cacti install to keep in for 6-8 weeks, so we can do useful 95th-percentile calculations, but I don't think it's that common.

After that time, the data starts to be 'blurry' and not really very useful to look at closely.

By saving the images for some period of time, you can get accurate data for as long as you are prepared to keep images. I have tried this with 1 week of 5-minute maps, and it takes 135M to store the frames. You can then use ffmpeg, ImageMagick or whatever to turn your PNGs into an AVI, MPEG, MPEG2... The results are not very exciting, from my tests, even though it sounds like it would be cool.

Howie · Post by **Howie** » Tue Nov 14, 2006 11:43 am

timi wrote:0.9 must pe owesome, when do you think it will be released ?

When I get a big chunk of spare time and nothing to do with it that pays money or is more fun

There are a lot of changes, and a lot of loose ends right now. Slowly, they are being tied up. Then there are a lot of manual updates to write.

streaker69 · Post by **streaker69** » Tue Nov 14, 2006 1:12 pm

Howie wrote:
timi wrote:0.9 must pe owesome, when do you think it will be released ?
When I get a big chunk of spare time and nothing to do with it that pays money or is more fun

There are a lot of changes, and a lot of loose ends right now. Slowly, they are being tied up. Then there are a lot of manual updates to write.

I've just given Tony Blair a call, he's going to close all the pubs this saturday so you have time to work on it.

Howie · Post by **Howie** » Tue Nov 14, 2006 1:29 pm

streaker69 wrote:I've just given Tony Blair a call, he's going to close all the pubs this saturday so you have time to work on it.

See, now I have to spend the rest of the week barricading my house for the impending riot...

flipflap · Post by **flipflap** » Wed Nov 22, 2006 4:32 am

hi, is there a way for weathermap to save an image of the map everytime it generates a new one with the filename of the map the date and the map name? thanks.

Howie · Post by **Howie** » Wed Nov 22, 2006 4:53 am

flipflap wrote:hi, is there a way for weathermap to save an image of the map everytime it generates a new one with the filename of the map the date and the map name? thanks.

I was about to point you to a thread about this, but the link to that thread is ALREADY in this thread (at the top)!

short answer: weathermap won't, but if you use unix, it's trivial to get cron to do it for you.

flipflap · Post by **flipflap** » Wed Nov 22, 2006 5:08 am

thanks mate

timi · Post by **timi** » Wed Nov 22, 2006 9:10 am

is it a way to make weathermap to save images in gif format ? I want to try to make some tests

but now i have to convert png to gif, or is it a way to make animated png ?:)

Howie · Post by **Howie** » Wed Nov 22, 2006 9:54 am

timi wrote:is it a way to make weathermap to save images in gif format ? I want to try to make some tests but now i have to convert png to gif, or is it a way to make animated png ?:)

ImageMagick will take pngs and make animated files in several formats - Animated GIFs, MPEGs... it's as simple as:

Code: Select all

convert *.png output.mpg

or

Code: Select all

convert   -delay 20   -loop 0   *.png  output.gif

should do it... the second one I got from this page

0.9 does let you choose to output in JPEG, PNG or GIF, though. I have found that JPEG is pretty good for weathermaps, even though it is lossy.

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