I have written code for Ganglia (http://ganglia.info) that uses rrdtool
export to export data of interest then "massages" the data into a proper
JSON format. I then use Flot (Javascript graphing library) to draw the
images. You can for instance see how it looks in action if you go here
http://fjrkr5ab.joyent.us/ganglia-2.0/?r=hour&cs=&ce=&m=&c=bx+workservers&h=baker.bx.psu.edu&mc=2&z=medium&metric_group=cpu
Find a graph that has an Enlarge button next to it. Click on it. You can
then hover over the graph value and it will show you current value. This
is very much work in progress.
There was a patch submitted by Erik Kastner to allow rrdtool to export
directly to JSON but I have not seen it included.
Vladimir
On Fri, 2 Sep 2011, nbelorgey wrote:
Richard,
The javascript graphing is huge !!!
This is fast, clear and efficient. The zoom is really user friendly &
impressive...
But in our case, some graphs will stack between 20-* elements that are
stored in ~6 MB RRDs. ( We're stacking VMs performance métrics on VMware
Clusters)
And we have around 4-12 graph per page... This will make for 25 VMs 25*12*6
~ 1800 MB to download ?
The client canno't download and process so much data
That's why it has to be server site processed...
Is there in your roadmap an ajax version that process on the server side and
return only needed information for graphing purpose ?
--
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