I don't think it is possible to give a proper answer to this question, as we are lacking benchmarks from high-end hardware. I will, however, try to estimate a value: My GPU, a Nvidia GeForce 730 takes 24 seconds (2,5/second) on average to attach an address to the tangle. I measured this by using the light wallet on an idle Windows 10 PC. I started the ...


Spam is only good, if it is widely distributed over the network. So if there are enough fullnodes which are used for the spamming transactions, everything is fine. If only a few fullnodes are spammed, this could harm the network. Additionally there is the coordinator, which is a bottleneck right now. The devs are using spamming attacks, to research the ...


The main two bottlenecks on the tangle are as follows: 1) The coordinator: currently, the tangle has a coordinator that ensures that the network isn't overwhelmed by a malicious attacker. Due to the coordinator, there is a limit on transactions per second which can cause slowdowns. Once the network is mature enough, the coordinator will be removed and ...


The protocol does not enforce a particular tip selection algorithm, so every transaction-issuing network participant is free to choose whatever method they want. The IOTA reference implementation (IRI) has chosen MCMC. As demonstrated in Equilibria in the Tangle from https://arxiv.org/abs/1712.05385 all network participants should (in theory) converge to the ...


The highlighted points of the tangle whitepaper are that first, you cannot enforce a selection strategy, and second, if you assume others are following monte carlo, then that is your best strategy to follow in order to be selected by others.


Yes it is already implemented in goshimmer since v0.6.3. The IOTA Congestion Control Algorithm (ICCA) used in IOTA 2.0 is based on mana. More in this blog post: https://blog.iota.org/explaining-the-iota-congestion-control-algorithm/


The IRI implements a random tip selection algorithm but you are free to modify it to select again and again the same transaction. It's what you do when you promote a transaction. Inundating the network should be very costly because you have to do the pow for every transaction.


Trying to recall something mentioned by CfB a while back, I believe IOTA will eventually use collective memory usage: In a sense that hash-based signatures will be reduced from 8192 to 64 bytes - which is over 99% compression therefore size will not be an issue. Also don't forget about snapshots

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