Those listening nodes still need to connect to the network. They usually, on first start, will connect to a DNS Seeder and ask it for some nodes to connect to. Generally these nodes are ones that have high uptimes and high bandwidth. The seeder will also record some information about the node that asked it for data in case it is a listening node so that it can send nodes to connect to that node as well. So there are then two ways to get information about non-listening nodes; run a DNS seeder, or operate a high uptime, high bandwidth node that gets lots of connections.
The second method doesn't really work that well since Bitcoin Core puts a maximum of 125 connections so it can't actually get thousands of nodes connecting in order to get accurate data. What Luke-Jr does is he operates a DNS seeder and builds his information off of there.
The DNS seeders are hard coded into the software. There are currently 6 DNS seeders, one of which is Luke-Jr's.
Topic: How is it possible to measure the amount of nodes that are just "listening" ? - page 2. (Read 1897 times)
April 05, 2017, 08:17:23 AM
April 05, 2017, 07:34:57 AM
This pie chart keeps on popping up everywhere:
http://luke.dashjr.org/programs/bitcoin/files/charts/software.html
It shows that the actual number of bitcoin core nodes is more that 67 000...
A very different number is shown at:
https://bitnodes.21.co/
My understanding is that the chart by Luke is also showing nodes that do not accept incoming connections...
In other words: Nodes that are only listening and do not forward transactions and blocks.
But how is it possible to measure the number of such nodes?
Can someone please explain..?
http://luke.dashjr.org/programs/bitcoin/files/charts/software.html
It shows that the actual number of bitcoin core nodes is more that 67 000...
A very different number is shown at:
https://bitnodes.21.co/
My understanding is that the chart by Luke is also showing nodes that do not accept incoming connections...
In other words: Nodes that are only listening and do not forward transactions and blocks.
But how is it possible to measure the number of such nodes?
Can someone please explain..?
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