Introduction

Welcome on the webpage of I2P Observer. It intends to collect information about the I2P Network and displays them in charts and tables. This should give both a current and a historical overview about the state of the network.
The I2P Observer is the result of a Bachelor Thesis by Jens Mueller at Berne University of Applied Sciences (BFH).

Data Base

I2P Observer extracts its data from the routerInfos stored in the netDB files of a running I2P router instance. Therefore, its data is not 100 % accurate, but only shows what the router currently knows. Depending on the uptime of the router, it can be very inaccurate and should only serve as approximation. It collects the amount of known routers and displays the highest value found in any entry, the amount of known floodfil routers and counts all leaseSets.
Additionally, a statistic about the router version is created in a second table.
The third table lists all countries in which I2P routers are operated, determined by their IP address with GeoIP Lite.
The data is collected once per hour and displayed on the Daily Statistics page separated by day. The Monthly Statistics page contains the average values of a day and is also updated hourly, so the entry for the current day is the average of all values collected so far.
Please see the Help page for brief explanaitions of the I2P terms.

Accuracy

As mentioned above, the data is neither completely accurate nor real-time. It only represents what the I2P router running for the I2P Observer knows about the network by analyzing its netDB entries.
A short estimation about the accuracy of the individual entries:

Routers: The total amount of routers running in the I2P network is estimated by taking the largest amount announced by any floodfil router. Presuming that there are floodfil routers that know a lot of the network, this is the closest approximation possible by the method used.
Floodfil Routers: Amount of all floodfil Routers known by the I2P Router.
LeaseSets: Count of all leaseSets propagated by all floodfil routers. As leaseSets are normally published to multiple floodfil routers, this number is assumed to be much bigger than the real amount. As the used method to collect data does not offer any analysis to find duplicate entries, this is the best estimation that can be done.

Versions: The version of the I2P software that is running on the routers.

Countries: Countries in which the routers are running, determined by their IP address using GeoIP Lite.