[hobbit] Graphs, iostat, nan

I've been looking at the rrd manual, and it looks like I should

be able to use a VDEF command to tell the graph to only

plot values above a certain percentage.

Here's my iostat rrdgraph description below. Any help would

be appreciated. I want to tell it to graph iostat values only when

the exceed 5% as an example.

[iostat]

    TITLE I/O Utilization

    YAXIS Stats

    FNPATTERN iostat.(.+).rrd

    DEF:p at RRDIDX@B=@RRDFN@:b:AVERAGE

    DEF:p at RRDIDX@C=@RRDFN@:w:AVERAGE

    CDEF:p at RRDIDX@t=p at RRDIDX@B,p at RRDIDX@B,UNKN,IF

    CDEF:p at RRDIDX@s=p at RRDIDX@C,p at RRDIDX@C,UNKN,IF

    LINE2:p at RRDIDX@t#@COLOR@:@RRDPARAM@ Busy

    LINE2:p at RRDIDX@s#@COLOR@:@RRDPARAM@ Wait

    COMMENT:\n

    GPRINT:p at RRDIDX@B:LAST:Busy    \: %5.1lf (cur)

    GPRINT:p at RRDIDX@B:MAX: \: %5.1lf (max)

    GPRINT:p at RRDIDX@B:MIN: \: %5.1lf (min)

    GPRINT:p at RRDIDX@B:AVERAGE: \: %5.1lf (avg)\n

    GPRINT:p at RRDIDX@C:LAST:Wait    \: %5.1lf (cur)

    GPRINT:p at RRDIDX@C:MAX: \: %5.1lf (max)

    GPRINT:p at RRDIDX@C:MIN: \: %5.1lf (min)

    GPRINT:p at RRDIDX@C:AVERAGE: \: %5.1lf (avg)\n

    COMMENT:\n

_____

From: James Wade [mailto:jkwade at futurefrontiers.com] Sent: Wednesday, January 02, 2008 1:39 PM To: hobbit at hswn.dk Subject: [hobbit] Graphs, iostat, nan

I have an iostat2 test that runs and graphs wait & busy

times of nfs mounts and disk mounts.

However, I have a lot of nan's in the data due to the

nfs mount or disk mount has no wait or busy times.

Is there a way when you display the graph to tell it not

to show any data with nan? It lists every partition with

the "NaN" values. I only want to see the data that has

values.

James