I'm guessing they want to try a real life situation. Basically trying to show the weakness you may face when buying or selling things.
In this case, they're screwing everyone up with their experimentation.
Topic: A scaled up spam experiment : #SpamTheBlockchain As A Service (Read 10999 times)
Why isn't the spam being tested on the testnet?
bitcoinfees, very useful, do you think to provide querying historical data ?
Can you provide a query format where we can select a particular the timespan ?
Once I get out from my procrastination zone, I want to make my spam site and just link to yours to provide the graphs.
Can you provide a query format where we can select a particular the timespan ?
Once I get out from my procrastination zone, I want to make my spam site and just link to yours to provide the graphs.
Yesterday I made a few transactions with Bitcoin Core, with a moderate transaction fee ("estimated to begin confirmation within 12 blocks"). No drama whatsoever, all transactions confirmed within the next block.
I guess the network is more resilient than many think.
I guess the network is more resilient than many think.
Did you happen to look at the size of the mempool at the moment you sent? I'm pretty sure, based on the time in which you wrote "yesterday" that you actually missed the stress test by about 24 hours. Nevertheless, even if you had been sending at the height of the congestion, obviously with a stochastic process your mileage may vary. My experience, and yours, are merely anecdotal. The big picture is what matters.
Yesterday I made a few transactions with Bitcoin Core, with a moderate transaction fee ("estimated to begin confirmation within 12 blocks"). No drama whatsoever, all transactions confirmed within the next block.
I guess the network is more resilient than many think.
I guess the network is more resilient than many think.
Queueing, but no catastrophe so far...
Most of the craziness went down yesterday. I got caught in it and a standard transaction (with a standard fee) took 8 hours to confirm. I read that these guys are planning on doing this again next Monday. I, for one, will be avoiding sending transactions this next time and will enjoy it on the sidelines, with popcorn, where I should have been last time.
Queueing, but no catastrophe so far...
Thanks Jorge for the mini-analysis. I'm the developer of that site.
The plot you linked is a dynamic one; so here is the static plot of that time interval:
https://i.imgur.com/dVzx0BL.png
And the same graph, but scaled for viewing of the tx byterate:
https://i.imgur.com/MEfBHg7.png
Some things to note (I should have added this on the site, ideally):
1. The tx byterate estimation is done using a exponential moving average, with a halflife of 1 hour.
2. The capacity byterate is given by
blockrate * expected max block size
where expectation is taken over the mining pools; estimates for pool max block size policies can be found here.
The plot you linked is a dynamic one; so here is the static plot of that time interval:
https://i.imgur.com/dVzx0BL.png
And the same graph, but scaled for viewing of the tx byterate:
https://i.imgur.com/MEfBHg7.png
Some things to note (I should have added this on the site, ideally):
1. The tx byterate estimation is done using a exponential moving average, with a halflife of 1 hour.
2. The capacity byterate is given by
blockrate * expected max block size
where expectation is taken over the mining pools; estimates for pool max block size policies can be found here.
Some results of the test gleaned from this plot:
Estimated network capacity: 85 kB/min
Typical input tx rate before test: 30--50 kB/min
Typical queue size before test: 300--600 kB
Peak input tx rate during test: 126 kB/min (~3x normal, ~50% over capacity)
Peak queue sizes during peak test: 12 MB (14:00), 14 MB (21:30)
Sustained input tx rate for several hours after peak: 70-100 kB/min
The test definitely showed that even a small player can create a large backlog with modest expense.
It showed that when the input transaction rate is close to the network capacity, even a small increase in that rate can create a huge backlog. Between 18:00 and 21:30, when the input rate increased from ~75 kB/min to ~112 kB/min (a 50% increase), the queue grew from ~3 MB to ~14 MB (a 370% increase).
The previous stress test (on a late friday night) used only free transactions, so the fee-paying transactions were delayed only slightly. This one used fee-paying transactions: it will be interesting to see how it affected the ordinary fee-paying transactions. I hope that someone will do a detailed analysis.
Estimated network capacity: 85 kB/min
Typical input tx rate before test: 30--50 kB/min
Typical queue size before test: 300--600 kB
Peak input tx rate during test: 126 kB/min (~3x normal, ~50% over capacity)
Peak queue sizes during peak test: 12 MB (14:00), 14 MB (21:30)
Sustained input tx rate for several hours after peak: 70-100 kB/min
The test definitely showed that even a small player can create a large backlog with modest expense.
It showed that when the input transaction rate is close to the network capacity, even a small increase in that rate can create a huge backlog. Between 18:00 and 21:30, when the input rate increased from ~75 kB/min to ~112 kB/min (a 50% increase), the queue grew from ~3 MB to ~14 MB (a 370% increase).
The previous stress test (on a late friday night) used only free transactions, so the fee-paying transactions were delayed only slightly. This one used fee-paying transactions: it will be interesting to see how it affected the ordinary fee-paying transactions. I hope that someone will do a detailed analysis.
There is a suspicion that the Coinwallet.eu "stress test" is actually a scam:
I believe we have our first scammer organizing a Bitcoin stress test
http://np.reddit.com/r/Bitcoin/comments/3ahl43/i_believe_we_have_our_first_scammer_organizing_a/
I believe we have our first scammer organizing a Bitcoin stress test
http://np.reddit.com/r/Bitcoin/comments/3ahl43/i_believe_we_have_our_first_scammer_organizing_a/
I thought I saw something about this on the mailing list earlier, there seems to be a company carrying it out on mainnet. At least they have the funds for it 
https://np.reddit.com/r/Bitcoin/comments/3agk61/ultimate_bitcoin_stress_test_monday_june_22nd/
I thought I saw something about this on the mailing list earlier, there seems to be a company carrying it out on mainnet. At least they have the funds for it
not me, I'm late at doing the site. Ended up learning TypeScript (because I wanted to try on the project) instead of doing the work. :/
I am also too lazy to program useless things 
Just for the intention of those people who say that the number of txs grows.
not me, I'm late at doing the site. Ended up learning TypeScript (because I wanted to try on the project) instead of doing the work. :/
I see somebody spamming blockchain with sending small amounts.
There are a lot of transactions like these past few blocks
https://blockchain.info/tx/1af09e021cba5eeec99c232f9a32796dc9a419e1d26ce5f492d023574ed2d497
https://blockchain.info/tx/d3d9353ca0655e35e348f9ca4c9510d4b33c3dcfaaf22837229d72932dc53d74
https://blockchain.info/tx/d783e2881aa943b0f64215bf85a587b5a90b9747b376aa26539d92774b206be9
https://blockchain.info/tx/ba5940b2622efa4860fd8d79d2013439fe17105b790a9920cf37056655f04d2b
https://blockchain.info/tx/d9aec25080bd07a74189a4a254f2f6ba5363e4d50903ef4dfb107aa4c1866100
etc etc
There are a lot of transactions like these past few blocks
https://blockchain.info/tx/1af09e021cba5eeec99c232f9a32796dc9a419e1d26ce5f492d023574ed2d497
https://blockchain.info/tx/d3d9353ca0655e35e348f9ca4c9510d4b33c3dcfaaf22837229d72932dc53d74
https://blockchain.info/tx/d783e2881aa943b0f64215bf85a587b5a90b9747b376aa26539d92774b206be9
https://blockchain.info/tx/ba5940b2622efa4860fd8d79d2013439fe17105b790a9920cf37056655f04d2b
https://blockchain.info/tx/d9aec25080bd07a74189a4a254f2f6ba5363e4d50903ef4dfb107aa4c1866100
etc etc
Actually I can get a STBaaS set up and running pretty quickly if the payment is right; how far have you got?
Anyway blockchain.info seems to be breaking very frequently these days; who is responsible?
On my side, did not started yet. Will do, I want to provide a way for the spammer to spread the spam on time and size.Anyway blockchain.info seems to be breaking very frequently these days; who is responsible?
Should be quick once get some free time, I'll try to release a quick and dirty alpha sunday.
The unit of spam will be measured in KB/Blocks with the adjustable timespan.
Actually I can get a STBaaS set up and running pretty quickly if the payment is right; how far have you got?
Anyway blockchain.info seems to be breaking very frequently these days; who is responsible?
Anyway blockchain.info seems to be breaking very frequently these days; who is responsible?
Are you guys spamming the blockchain at this transaction.
https://www.blocktrail.com/BTC/address/1JwSSubhmg6iPtRjtyqhUYYH7bZg3Lfy1T/transactions
https://www.blocktrail.com/BTC/address/1JwSSubhmg6iPtRjtyqhUYYH7bZg3Lfy1T/transactions
Have you read messages above in this topic?
https://bitcointalksearch.org/topic/m.11579864
Are you guys spamming the blockchain at this transaction.
https://www.blocktrail.com/BTC/address/1JwSSubhmg6iPtRjtyqhUYYH7bZg3Lfy1T/transactions
https://www.blocktrail.com/BTC/address/1JwSSubhmg6iPtRjtyqhUYYH7bZg3Lfy1T/transactions
Here is existing service for blockchain spamming:
http://cryptograffiti.info/
It has big costs, but spams also to UTXO set
http://cryptograffiti.info/
It has big costs, but spams also to UTXO set
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