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Board Bitcoin Technical Support

Re: Simulating the Bitcoin Blockchain on a Cluster

nullifies

on 01/03/2018, 22:58:50 UTC

I have experience with MPI(clustering) outside of this. It seems like integrating the bitcoin aspect into the program is what is giving me hell. I have written a few different versions to complete the task, all of which appeared to work until I began looking deeper in the output data and realized it wasn't at all correct. I then looked into why this could be and realized how janky my interaction with bitcoind was. I have 6 physical nodes running in small beowulf cluster. They are running Ubuntu Server 1604, and they are using MPICH.

Also, fixed the link, sorry about that.

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Board Bitcoin Technical Support

Topic OP

Simulating the Bitcoin Blockchain on a Cluster

nullifies

on 01/03/2018, 05:23:50 UTC

I am trying to simulate the Bitcoin Blockchain using regtest for research reasons but am having lots of trouble. I have a beowulf cluster that I am trying to run the simulation on. For some specifics I am trying to rapidly send transactions and generate blocks with specified block times. I am using MPI in C++ with GitHub.com/minium/bitcoin-cpp-api to attempt this. Can anyone suggest a better or more simple way of approaching this? How would you go about this?

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Board Development & Technical Discussion

Running Regtest with Libbitcoin

nullifies

on 17/02/2018, 20:32:59 UTC

I am having trouble using libbitcoin to run a regtest node. The documentation provided on regtest seems to be a bit sparse when it comes to the configuration of the server. I was wondering if anyone has been able to get this running and could possible shed some light on this process.

I have seen https://github.com/libbitcoin/libbitcoin-server/wiki/Regtest-Configuration and I've tried a bunch of different ways of implementing these different configuration options but I keep getting the following error when I try starting the server after I initialize the chain:

Code:

20:31:53.264383 INFO [server] ================= startup ==================
20:31:53.264405 WARNING [server] ================= startup ==================
20:31:53.264476 ERROR [server] ================= startup ==================
20:31:53.264509 FATAL [server] ================= startup ==================
20:31:53.264534 INFO [server] Using config file: "/usr/local/etc/libbitcoin/bs.cfg"
20:31:53.264572 INFO [server] Please wait while the server is starting...
20:31:53.265203 INFO [network] Starting manual session.
20:31:53.265276 INFO [network] Not configured to populate an address pool.
20:31:53.265299 INFO [server] Seeding is complete.
20:31:53.265343 INFO [node] Node start height is (0).
20:31:53.265393 INFO [network] Not configured for accepting incoming connections.
20:31:53.265420 INFO [network] Starting outbound session.
20:31:53.265476 WARNING [network] Failure fetching new address: object does not exist
20:31:53.265557 WARNING [network] Failure fetching new address: object does not exist
20:31:53.265586 WARNING [network] Failure fetching new address: object does not exist
20:31:53.265613 WARNING [network] Failure fetching new address: object does not exist
20:31:53.265626 WARNING [network] Failure fetching new address: object does not exist
20:31:53.265675 WARNING [network] Failure fetching new address: object does not exist
20:31:53.265692 WARNING [network] Failure fetching new address: object does not exist
20:31:53.265705 WARNING [network] Failure fetching new address: object does not exist
20:31:53.265718 WARNING [network] Failure fetching new address: object does not exist
20:31:53.265731 WARNING [network] Failure fetching new address: object does not exist
20:31:53.266051 INFO [server] Bound public query service to tcp://*:9091
20:31:53.266251 INFO [server] Bound public heartbeat service to tcp://*:9092
20:31:53.266339 INFO [server] Bound public block service to tcp://*:9093
20:31:53.266451 INFO [server] Bound public transaction service to tcp://*:9094
20:31:53.266478 INFO [server] Server is started.
20:31:58.265851 WARNING [network] Failure fetching new address: object does not exist
20:31:58.265889 WARNING [network] Failure fetching new address: object does not exist
20:31:58.266024 WARNING [network] Failure fetching new address: object does not exist
20:31:58.266048 WARNING [network] Failure fetching new address: object does not exist
20:31:58.266110 WARNING [network] Failure fetching new address: object does not exist
20:31:58.266133 WARNING [network] Failure fetching new address: object does not exist
20:31:58.266212 WARNING [network] Failure fetching new address: object does not exist
20:31:58.266240 WARNING [network] Failure fetching new address: object does not exist
20:31:58.266345 WARNING [network] Failure fetching new address: object does not exist
20:31:58.266354 WARNING [network] Failure fetching new address: object does not exist

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Board Announcements (Altcoins)

Re: [ANN] Signatum 2.0

nullifies

on 23/10/2017, 01:31:56 UTC

For some reason they didn't make it clear on the ANN, but theres is a 28% dev fee. Check their official website. signatum.org

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Board Tokens (Altcoins)

Re: ANN [DENT] Dent: Tokenizing and Liberating the World's Mobile Data

nullifies

on 14/08/2017, 05:44:03 UTC

Quote from: electronicash on August 14, 2017, 04:25:49 AM

Quote from: nezaigor on August 14, 2017, 04:18:30 AM

I want the price below ICO. To purchase. The token when entering a large exchange can well shoot.

i wouldn't do it if i were you. you'd rather buy a token with a value like $0.01 than having millions of it without a developed product. the idea of this project is good but so long as you don't see anything yet, its not going to be anything special.

has the team already burned the unsold tokens? that is still a question.

To quote https://www.dentcoin.com/faq:

-"Should any tokens remain unsold in the Crowdsale, these remain in the company as reserve."

-"Founders will not take any DENT tokens off the table."

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Board Mining (Altcoins)

Re: Signatum (skunk) ccminer-krnlx 30+mh 1070, 50+ mh 1080ti [FREE,OPENSOURCE]

nullifies

on 10/08/2017, 00:55:52 UTC

I'm getting 25 Mh now instead of 18 w/ a 980Ti. Thanks!

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Board Mining (Altcoins)

What coins use a staking or harvesting mechanism?

nullifies

on 10/08/2017, 00:38:45 UTC

I have a small Beowulf cluster that I built for fun. I was thinking about running some staking or minting coin on them to put them to utilize them at night or really anytime I'm not using them. Is there a list I can reference for these types of coins? I would also be open to actual mining on them but the nodes are pretty old (dual core from ~2008).