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zoom graph feature

4 messages in this thread

list Galen Johnson · Tue, 30 Jan 2007 00:22:23 -0500 · 
I think this has come up previously but I don't recall seeing a response...but how hard would it be to have the Zoom Graph function set the graph max to more accurately reflect the height of the block you select...ie, if I have a low load and I select a max height of around .2 when I drag my box, could the max on the new zoom be .2 instead of 1.0?

=G=
list Henrik Størner · Tue, 30 Jan 2007 10:19:37 +0000 (UTC) ·
▸ quoted from Galen Johnson
In <user-ba34e7fdaeba@xymon.invalid> Galen Johnson <user-d2ff723b6cb6@xymon.invalid> writes:

I think this has come up previously but I don't recall seeing a response...but how hard would it be to have the Zoom Graph function set the graph max to more accurately reflect the height of the block you select...ie, if I have a low load and I select a max height of around .2 when I drag my box, could the max on the new zoom be .2 instead of 1.0?
First of all, it would require that you're using version 1.2.x of the RRDtool
library. I guess it's safe to upgrade now, but back when I was putting the zoom stuff together, rrdtool 1.2 wasn't quite stable.

rrdtool 1.0 simply doesn't provide the information about the value range on the y-axis that is needed to implement the zoom. Tobi Oetiker who maintains
the rrdtool library added this in 1.2 at my suggestion :-)

I'll look at reviving some old code I had to implement this. It requires some changes to both the hobbitgraph CGI and the zoom.js javascript code.


Regards,
Henrik
list Galen Johnson · Thu, 01 Feb 2007 00:17:58 -0500 ·
▸ quoted from Henrik Størner
Henrik Stoerner wrote:
In <user-ba34e7fdaeba@xymon.invalid> Galen Johnson <user-d2ff723b6cb6@xymon.invalid> writes:

  
I think this has come up previously but I don't recall seeing a response...but how hard would it be to have the Zoom Graph function set the graph max to more accurately reflect the height of the block you select...ie, if I have a low load and I select a max height of around .2 when I drag my box, could the max on the new zoom be .2 instead of 1.0?
    
First of all, it would require that you're using version 1.2.x of the RRDtool
library. I guess it's safe to upgrade now, but back when I was putting the zoom stuff together, rrdtool 1.2 wasn't quite stable.

rrdtool 1.0 simply doesn't provide the information about the value range on the y-axis that is needed to implement the zoom. Tobi Oetiker who maintains
the rrdtool library added this in 1.2 at my suggestion :-)

I'll look at reviving some old code I had to implement this. It requires some changes to both the hobbitgraph CGI and the zoom.js javascript code.


Regards,
Henrik


Sweet, I'm already using 1.2 so that'd be awesome if you could.

=G=
list Galen Johnson · Mon, 19 Feb 2007 23:00:17 -0500 ·
▸ quoted from Galen Johnson
Galen Johnson wrote:
Henrik Stoerner wrote:
In <user-ba34e7fdaeba@xymon.invalid> Galen Johnson <user-d2ff723b6cb6@xymon.invalid> writes:

 
I think this has come up previously but I don't recall seeing a response...but how hard would it be to have the Zoom Graph function set the graph max to more accurately reflect the height of the block you select...ie, if I have a low load and I select a max height of around .2 when I drag my box, could the max on the new zoom be .2 instead of 1.0?
    
First of all, it would require that you're using version 1.2.x of the RRDtool
library. I guess it's safe to upgrade now, but back when I was putting the zoom stuff together, rrdtool 1.2 wasn't quite stable.

rrdtool 1.0 simply doesn't provide the information about the value range on the y-axis that is needed to implement the zoom. Tobi Oetiker who maintains
the rrdtool library added this in 1.2 at my suggestion :-)

I'll look at reviving some old code I had to implement this. It requires some changes to both the hobbitgraph CGI and the zoom.js javascript code.


Regards,
Henrik
  
Sweet, I'm already using 1.2 so that'd be awesome if you could.

=G=


It looks like this may be in the latest snapshot.  I grabbed it and put the hobbitgraph.cgi and zoom.js and put them in place.  I tried it and it mostly works.  The one thing I've noticed is it doesn't work as expected with multivalue graphs such as disks and memory.  When you select and area, it still tries to show all the values regardless of whether the area selected contains the line.

=G=