One Graph with Multiple OIDs from different Hosts

[zebo51]

We have temperature monitoring devices in our data centers in each office. Right now I have a graph for each location. I would like to combine all these onto one graph, have different line colors and a legend stating which line color is what. Having a min/avg/max info for each would be nice too, but I don't know how cluttered or messy that may all get. Also the value I get from the OID is deg C and I would like deg F. I see there is a CDEF for the conversion but I am not sure how to apply it either.

I have tried to follow this how to: http://forums.cacti.net/viewtopic.php?t=8415 with no luck.

Just getting started with Cacti, so please be as step specific as you can with any directions or help in setting this up.

Thanks

[gandalf]

Let's tackle the C->F conversion first. You will want to apply the CDEF to all Graph Items of the graph (LINE,AREA,STACK,GRPINT).
The aggregation issue is solved by using AGGREGATE plugin
Reinhard

[zebo51]

Let's tackle the C->F conversion first. You will want to apply the CDEF to all Graph Items of the graph (LINE,AREA,STACK,GRPINT).
The aggregation issue is solved by using AGGREGATE plugin
Reinhard

I already have area graphs for each of my locations using SNMP - Generic OID template. Looking under devices, data sources, graph management I don't see how to apply the CDEF to my exiting graphs. Do I need to create new ones in a different way to apply the CDEF?

Thanks

[gandalf]

The CDEF would be applied to the Graph Template for those graphs
Reinhard

[zebo51]

The CDEF would be applied to the Graph Template for those graphs
Reinhard

So right now they are using the defualt SNMP - Generic OID. If I don't want to affect that one, I need to create a new template to apply it too?

Will I need a new template for each one so they will have different colors?

Thanks

EDIT: Nevermind, I just made a duplicate of it, then went into graph item #1 and set the CDEF to C to F, then set my devices to use that template.

Now I will check out the plugin you mentioned above.

Thanks

[zebo51]

The CDEF would be applied to the Graph Template for those graphs
Reinhard

I think I got the aggregate plugin working, I see my data sources all in one graph. It seems though that the legends are showing my temps in C. The graph lines are correct showing F values. How do I get the legends to conver too? It does this on the single device graphs and the aggregate one. So I am guessing if I get it fixed on each device graph, the aggregate one will be correct.

Thanks

[gandalf]

Please apply the CDEF to the LEGENDs of each Graph prior to aggregation. Verify it works fine, then aggregate.
Reinhard

[zebo51]

Please apply the CDEF to the LEGENDs of each Graph prior to aggregation. Verify it works fine, then aggregate.
Reinhard

Great, that worked.

One thing I noticed is when I make a change to my graph template, the items in the aggregate get all our of order. I then have to use the arrows to get them arranged again, but what a PITA. Is this a bug or why does it happen?

Thanks

[gandalf]

At least it is not a planned feature. And I would not insist in ongoing support for it.
So I suppose it's time again for some debugging, sigh
Reinhard