If I understand you correctly from your diagram, you want to have a Y-axis showing the VDEF value, and the X-axis simply has separate sources, not a scale.
If this is the case, then you cannot do it with RRDTool alone. In RRDtool, the X-axis is ALWAYS time. Your only option is to extract the VDEF data using FETCH, and then use a separate graphing package to render this as a graph. If Im wrong, and your X-Axis is intended to be time but grouped in months, showing for a single VDEF, then you can do this by forcing your graph to have a monthly resolution and plot that as an area with the slope option off. You end up with a chunky bar graph then. Steve _____ Steve Shipway ITS Unix Services Design Lead University of Auckland, New Zealand Floor 1, 58 Symonds Street, Auckland Phone: +64 (0)9 3737599 ext 86487 DDI: +64 (0)9 924 6487 Mobile: +64 (0)21 753 189 Email: <mailto:[email protected]> [email protected] P Please consider the environment before printing this e-mail From: [email protected] [mailto:[email protected]] On Behalf Of Shabnam Shahreza Sent: Thursday, 13 October 2011 7:09 a.m. To: [email protected] Subject: [rrd-users] 3 questions Hi rrd-users; I am new to rrdtool and have few questions: 1) How can I draw only dots/pixels for the VDEF (MAXIMUM) values and not *line* or dashed line? I mean only one dot for the maximum value for start-to-end time period? 2) And how can I compare different VDEF (MAXIMUMs) from several rrd files in one graph and pick the MAX of them? Do I need to create a new rrd file and extract the max from there? 3) And how can I calculate separate VDEF (MAXIMUM) for different start-to-end time frames in one graph, such as monthly? The answers can help me to draw only maximum values per month from several sources but in one graph. (each dot in the below example can come from a different rrd file) ^ | o | o | o o | o o +-------------+-------+--------+---------+-------+---------------à Regards; Sbnm
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