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47 lines
1.4 KiB
Plaintext
47 lines
1.4 KiB
Plaintext
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== NTK_RFC 0005 ==
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Subject: Life probability
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----
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This text describes a change to the Npv7.
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It will be included in the final documentation, so feel free to correct it.
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But if you want to change the system here described, please contact us first.
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----
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Statistically the probability of a node to continue to stay up is related to
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its uptime, for example if the node X has an uptime of 30 seconds and the node Y of
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1200 seconds, then it is more probable that the node Y will continue to stay
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up.
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For this reason we give higher credits to older nodes/gnodes, this means that
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in a multipath route we prefer to don't use very young nodes as main gateways.
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{{{
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A
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/ \
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L K
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\ /
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N
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}}}
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Let's say K has an uptime of 600 seconds and L of 200.
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The node N, to reach A, will prefer the node K.
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=== Implementation ===
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In order to implement this we penalize the new nodes/gnodes by increasing
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their rtt, in this way they will be considered as slow links.
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We can do this only for new nodes/gnodes 'cause we cannot trust the uptime
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value given by a node, but we can know for sure if that node is completely
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new.
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When the next qspn_round updates the routes the penality is removed.
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Another system would be counting the number of qspn_rounds the nodes took part
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in.
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If it has only partecipated in < 3 rounds it is considered young.
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----
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related: [Netsukuku_RFC]
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