[rrd-developers] Re: rrdtool graph (fwd)

Tobias Oetiker oetiker at ee.ethz.ch
Sun Aug 12 19:28:04 MEST 2001

Today Alex van den Bogaerdt wrote:

 | Hi,
 | It seems to me that the graph portion of rrdtool is turning into
 | a front-end type of program rather than a backend program.  This
 | is not a bad thing however now may be the time to rethink about
 | this.  The grapher portion becomes quite large.
 | Just as a proposal for discussion:  what if we take the DEF,CDEF
 | and VDEF stuff apart.  This generates arrays of numbers and can
 | change the databases (Jake's stuff).  Processing the arrays is
 | IMHO a task for a front-end application which could be called
 | rrdgraph.  The same arrays could be fetched by another front-end
 | application called rrdreport.
 | Of course, the current "rrdtool graph" will not have to go per se.
 | It can be made a hook to the front-end if desired.  It may be
 | enough to modify rrdtool fetch slightly and in the new rrdgraph
 | front-end application we'd make DEF a hook to fetch.
 | Consolidating the arrays into something suitable for graphing is
 | already a job for the front-end part.
 | What do you all think about this?

Moving the data manipulation stuff to an extra module certainly
sounds like a good idea to me ... we could think of it as an
extended version of rrdtool fetch ... how would you go about it?
What aobut the interfaces ?


 | cheers,

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