[collectd] help with exec plugin string format

[GRAY Andrew G (SPARQ)]

Dear all,
I 'm trying to track usage of pools of virtual machines.

So I have the gauge type working, but I really want two traces on the one graph.
The df type as defined in the types.db file seems to suit,

Using the gauge type
types.db
gauge    value:GAUGE:0:1234567890

Exec Plugin writes the following
PUTVAL                $hostname/pool-poolname/gauge         N:$value

Which generates a graph with a single blue trace.

Now,
I'm trying to get a dual trace graph with red and green, similar to the df plugin.
Which I can't seem to find any docs on ....

types.db
df            user:GAUGE:0:1234567890, free:GAUGE:0:1234567890

Writing ....
PUTVAL                $hostname/pool-poolname/df-user       N:$value1:$value2   .... Doesn't work
PUTVAL                $hostname/pool-poolname/df                 N:user:$value1, N:free:$value2   .... Doesn't work

Can anyone point me at some docs, or let me know the secret ingredient ??

Thanks for any help,

Andrew Gray.
Unix Administration.

 
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