One-Wire weather station using Simon Melhuish's OWW software. Originally started with the original 1-wire demonstration weather station from Dallas Semiconductor which contained a single temperature sensor, wind speed and direction sensors. Added several sensors over the years some of which have stopped working but I still have 9 working temperature sensors: several inside, two outside ('spare' is original temp sensor on 10' pole attached to chimney), two in the attic and one each in the two return air ducts (two zone HAVAC). The barometer sensor is in the wiring closet which is the warmest room in the house. The sensor in the Living room is on the floor and is usually the coolest. The humidity sensor needs to be replaced. This plot which starts at about 6 am shows the heater (set point is 68 in the morning) was on while the outside temperature was just above freezing (33 F).

You can see the sun heating the roof and attic which reaches 100+ just after noon. We had a high of 78 around 2 pm, then house cooling off after sunset and the heater coming on around 10 pm.

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-- Claude Felizardo, 2005/10. To view the trend history for CPU user, system, nice and idle statistics for last 24 hours.

Y-Axis max values are dynamic, based on the number fo CPUs the server has. This is collected in runtime using shell script and rrdcgi, by parsing /proc/cpuinfo to know the number of processor the server, for setting the max Y-Axis value correspondingly. So, the whole graph area can be visualized as the capacity of the server in terms of CPU. More blanks space in the graph, more free the CPU is. -- Amzath Ali Rahumathullah, 2010/10. To view the comparision of data collected today with last week sameday statistics, for last 24 hours.

This is acheived by the SHIFT parameter in RRD, by shifting the time to the required number of days backwards, in my case 7 days back. Also, i have used cgi to pass parameters in runtime to calculate this shift difference.

For example, if i would like to compare today's data with yesterday, then i would pass 1 as the daydelta to the cgi, whcih would calculate the SHIFT values. Then, i have used rrdcgi to render the grpahs in runtime. -- Amzath Ali Rahumathullah, 2010/10. Although MPLS VPN endpoints seem just one hop away from the IP point of view, there is always a more complex underlying infrastructure. Collecting endpoint RTTs (pings) and plotting them reveals the hidden infrastructure. This image shows that there are 6 groups of endpoints that have consistent minimum RTTs. This is most likely due to the number of real hops in the underlying infrastructure and can also be influenced by the last mile technology.

It's also easy to spot temporary re-routing: in this example the light green endpoint plots temporarily out of his 'league'. -- Bruno Ciscato, 2008/9. Fluxoscope is a system used by SWITCH for measurements of our external network traffic. One of its products are graphs which represent, for each external connection, the protocol distribution of traffic over time. The example graph shows the traffic distribution on one of our 'upstream' or transit ISPs over a period of a few hours. The 'positive' part of the graph shows incoming traffic (what we receive from the ISP), the 'negative' part corresponds to outgoing traffic (what we send them).

-- Simon Leinen, 2005/5. Connection graph shows simultaneous connections in green, and connection times in blue. The dark blue line shows the average connection time, with lighter blue used to show the range from minimum to maximum as a blurring effect.

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The data is taken from a spamd logfile every time a line is added, or at 10 second intervals if no new data arrives in which case the most recent values are duplicated. The RRD is created with a 30 second heartbeat - so some fractional number of connections is possible. For those unfamiliar with spamd, it is an SMTP tarpit for blacklisted senders.

The logfile includes the number of concurrent connections each time a new host connects, and the time a connection has lasted when a host disconnects. The number of connections should be fairly accurate in the graphs, while the connection times are not so in the short-term, depending more on the timing of the disconnects. Connections and times are tracked separately in perl, except that disconnects cause a decrement in the connection count as well. -- Christopher Kruslicky, 2005/4. Simply parse of SNMPget from Vendor OID. The graph display the actual send a PAP push to the mobile, possibile errors due to get to HLR and retrieve for mobile. -- Alex Rivoltella, 2006/3 Add your own graphs to this list If you have created a graph you like, and you think I would like it too, please send me the image plus an xml file like the example below to be considered for addition to this page.