Improving Bitcoin's Resilience to Churn | DeepAI

Actual Data from a serious test with blocks from 0MB - 10MB

Jonathan Toomim's work on blocksize measurements is not appreciated widely enough.
The data from his intensive global testnet investigations is presented in a nice and informative interactive format here:
https://toom.im/blocktime
Jonathan presented this data at scaling bitcoin Hong Kong, and then proceeded to spend many more days in Asia talking to miners there, the results of which have been summarized in other posts.
The tests charted at the link above involved generating blocks in London, and watching how they propagated across the world.
TL;DR: if you're in China, you have a problem whose name is the Great Firewall, that affects even tiny blocks. Otherwise, your experience is pretty good, even up to 9+MB blocks. Have a look at the data for yourself.
One of the things you'll see Jonathan has been testing is "thin blocks". This is a simple compression technique similar to IBLT or the relay network, but it's built into a fully validating node. It was written by Mike Hearn and is currently available as a patch to XT. It's still being improved but as you'll see from the charts, it can make a huge difference in block propagation times.
In this first test, thin blocks didn't have much effect on larger blocks -- this was due to an index size limit that is now being addressed in both core and XT (technically, "setInventoryKnown" was much too small).
Jonathan is now planning another global test with many improvements to the first. Thank you JT!
submitted by dgenr8 to btc [link] [comments]

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Bitcoin is a digital currency that unlike traditional currencies does not rely on a centralized authority. Instead Bitcoin relies on a network of volunteers that collectively implement a Spearheaded by Blockstream co-founder Pieter Wuille, Bitcoin Core contributor and fellow Blockstream co-founder Gregory Maxwell, and Blockstream software engineer Gleb Naumenko, the open-source initiative is designed to achieve set reconciliation between the mempools of each full node. After what looks like five months of work, Bitcoin Unlimited has this Tuesday merged a block compression method that tackles bandwidth bottlenecks to address scalability.. Graphene, proposed in November 2017 by Gavin Andresen, former Bitcoin Core lead developer, takes a 1MB block and reduces it to 2.6KB. The Bitcoin cryptocurrency, originally introduced by Satoshi Nakamoto in 2008 [], is today an extremely popular peer-to-peer electronic payment system used for buying and selling goods in different markets across the globe.Far beyond its initial purview, today’s Bitcoin network has roughly eleven thousand nodes 1 1 1 In this paper, the term node refers to what Bitcoin calls a full node The bitcoin variable block size Bitcoin Core github repo would veto any block size increase, and decidedopen source code with a block size increase added in, known as Classic.satoshi block sizeHe left a job developing space research apps at NASA to work on bitcoin full-time, going on to work on the theory behind some possibly huge future

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