Questions tagged [synchronization]

This tag should be used for questions about synchronizing a Bitcoin client. This is the process of bringing a Bitcoin client up to date with the blockchain.

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1answer
42 views

Is there some kind of USB antenna I can buy to be able to use Bitcoin even when there is no Internet?

Let's say they cut the Internet tomorrow. I will still have my private keys on my offline computer, but I won't be able to sync the blockchain (as won't anyone else) and I can't make any "send ...
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1answer
29 views

Bitcoin Core resume

iam downloading the 350GB Core database via slow network. iam not shure, if an correct resume occurs, if i need to breask the transmission. my question: is there any risk for inconsistence of bitcoin ...
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Multisig synchronization

I understand what the multisig wallets are but I need help understanding what exactly this script does: https://gist.github.com/gavinandresen/3882537 If I understand correctly, bitcoinds are bitcoin ...
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23 views

bitcoin-qt 0.21.0 in win10 keep hight disk I/O, and GUI not respond

My OS is win10, and I used to use bitcoin-qt 0.13.0, it was fine but I found it syncs very slow now, so I upgraded bitcoin-qt to 0.21.0. I feel 0.21.0 syncs much faster, but it always keep high disk ...
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15 views

Automatic synchronization on multiple devices, but only for the selected wallet

I need a solution to improve this very annoying procedure. I utilize CoinStats to synchronize my crypto and I do it manually. Since I've incorporated into my app three more wallets, one for my mom, ...
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1answer
959 views

Is there a way to only sync up to a certain block?

I am planning on doing some transaction analysis on the blockchain, however, I only want to do it on a small part of the blockchain first and then run it on the full blockchain later on. I have ...
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1answer
19 views

Deleting Electrum wallet and setting up new one

I set up an Electrum wallet before I learnt that you should verify the signature. While I went straight to the electrum.org website to download it, I would still like to be secure, just in case. So I ...
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2answers
263 views

Does running a pruned node support the syncing of other nodes in the network?

I decided to prune my Bitcoin core node to 25 GB. With the blocks that the node has in its data directory (the ones that were not deleted), does such a node support the syncing of other nodes in the ...
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1answer
54 views

Am I seriously going to have to keep this clunky old infernal machine running for weeks upon weeks to sync the blockchain? [duplicate]

Yesterday, I dug up my old computer, set it up physically, installed Linux Mint with full disk encryption, installed Bitcoin Core through its software manager, started it, immediately selected "...
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1answer
48 views

Why would Bitcoin Core freeze my computer when syncing? And is it supposed to take this long?

24 hours ago, I finally bit the bullet and dug up my old computer, set it up physically, installed Linux Mint (with full disk encryption), installed Bitcoin Core through its software manager, started ...
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0answers
27 views

To what extent is the actual downloading of blockchain data what slows down a “fresh sync”? [duplicate]

I've just sat an old computer with fresh Linux Mint and Bitcoin Core installed to sync from scratch. Since its HDD is 250 GB, I had to enable "pruned mode" since the blockchain is currently ...
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4answers
139 views

How isn't blockchain fundamentally broken?

This question is a good 3 to 5 years late on the crypto trend but nevertheless I'm still having trouble to understand. The chain works by verifying every previous block, right? How does this not ...
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28 views

Bitcoin QT wallet.dat file location? [duplicate]

It's been since 2013 when i was mining bitcoin that i have used and synchronized this wallet. I've tried a few times several years ago but it literally takes days, if not weeks now to synchronize, AND,...
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1answer
35 views

Can I interrupt the initial blockchain download without losing progress?

I just installed Bitcoin Core through brew on my mac. The blockchain is now downloading but it's slowing down, so I would like to restart it. Can I abort the process and restart it and will it pick up ...
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2answers
1k views

Why is it bad to download the full chain from a third party with Bitcoin Core?

I know Bitcoin Core downloads and processes the full chain much quicker now than it used to but what exactly is so bad about downloading a compressed blocks, chainstate and database folder from a ...
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2answers
115 views

Very slow sync on low end PC - what to upgrade?

[Hi, I have to re-ask this question because I cannot recover my account from the last one. Sorry about that.] I am a newbie to bitcoin. I am trying to sync a full node on my low end PC: 2g RAM, dual-...
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52 views

Will Upgrading Ram on Low End PC Make Core Sync faster?

I am a newbie to bitcoin. I am trying to sync a full node on my low end PC: 2g RAM, dual-core 2ghz, 250 gb regular HDD. It is in pruned mode. The initial 15% synced in a few days but now the process ...
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1answer
73 views

How to improve bitcoin-qt when downloading blockchain? (very technical, dev views appreciated)

GitHub suggested discussing here before bothering developers with an issue. So be it! :) I'm running Bitcoin Core Version v0.20.1 and Linux Mint 18.3 on crappy old hardware. Pruning blockchain to 2 G ...
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0answers
34 views

Initial blockchain sync stuck on block 237158

Stuck on block 237158. Rebooting doesn't work. Do I need to start from scratch? admin@raspberry2bit:~ $ sudo tail -f /mnt/ext/bitcoin/debug.log 2020-10-26T08:48:30Z Loading addresses from DNS seed ...
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1answer
42 views

Blocks seem to store only txIDs, where does the transaction data come from for IBD?

I know that blocks store transactions. After looking into a block, I can see that it only stores txIDs. Question 1 - Where are actual transaction objects stored? If you tell me that it's stored in a ...
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2answers
273 views

Download blocks in blk00000.dat format from a specific period

For study purposes, I would like to download blocks from a specific period, i.e. January 2017 - June 2017, in blk.dat format (blk00000.dat, blk*.dat). I downloaded blockchain.core but it makes me ...
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1answer
56 views

How can I know that a full node has finished the initial synchronization process?

I run a full bitcoin node. I launched it several days ago and it has consumed around 300 GB of traffic already which implies that it is about to finish the initial syncronization process. Except for ...
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2answers
28 views

Change IBD Location Prior to Download

I'd like to run Bitcoin Core but my laptop can't handle the load. I have an external drive with enough space, but I'm unsure if/how to change the file destination upon opening the program. Is this ...
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1answer
75 views

Wallet download issues, cannot restore backup

greetings everybody ..... I hope everybody is safe. I have a problem recovering my wallet, earlier this year there was a link on the website that make me able to access my wallet and recover the ...
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0answers
37 views

Clarfication on “ network synchrounisation” in analyzing bitcoin protocol in a synchronous model

I am reading The Bitcoin Backbone Protocol:Analysis and Applications and i have no previous knowledge on different type of networks . And there is a term in paper " high network synchronicity &...
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1answer
31 views

Should a node follow the longest chain, or the chain with most work while syncing?

I'm reading mixed things online - some saying to follow the longest chain, and some say to follow the chain with the most work. But I'm not convinced of the former. If the node follows the longest ...
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1answer
112 views

The Mystery: I've mined some BTCs with Bitcoin Core 0.9.0, however the system no longer synchronizes and in the blockchain the balance is zero

I got some BTCs using a Bitcoin Core 9 version beta, from August to December 2019, they are listed in my history as "generated" and with several confirmations with one, the balance appears ...
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1answer
51 views

How to detect that full node is in sync (using jsonrpc)?

I have full bitcoin node available through jsonrpc interface. How my app can detect if this node is in sync with the network?
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0answers
156 views

Pruning Blockstore has been running for days

After activating the core (Testnet - Pruned) with the command bitcoin-qt i received the following error: Corrupt Block Database I restarted the synchronization always using the Pruned mode. The core ...
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1answer
153 views

Missing transaction in newly installed Bither wallet

On bitcoin.org I learned about the Bither wallet. I installed it, created an HD account, and replenished the wallet sending to the address 19QpMgv2N2hSJNq6Nrkg1rzJ1Fc9s2Pjbf. As can be seen, the ...
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30 views

Bitcon core wallet showing zero after synchronization

My father tried to sync his Bitcon Core wallet and he doesn`t know why synchronization lasted for shorter time than the wallet had estimated before. After synchronization the wallet showed crash and ...
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0answers
79 views

Bitcoin Core wallet fails to load and requires reindex after I already did it

My Bitcoin Core is synchronized. But I can't open a wallet, it says that I might need a reindex. Though I already did it. Also I can't do dumpprivkey because it says that no wallet is loaded. How can ...
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1answer
228 views

Downloading the pruned blockchain file directly from external source

Using the bitcoin client to have a pruned version of the blockchain can take a lot of time, I was wondering what would be the drawback to simply download an already pruned bitcoin blockchain file from ...
3
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1answer
64 views

Why does bitcoin sync inventories?

I read the bitcoin docs describing how btc syncs. During IBD it gets the inventories up to the tip with getblock. Why does it not skip this step and get the blocks, generating the inventories as it ...
2
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1answer
591 views

How to download bitcoin blockchain without core?

I tried to download the entire blockchain using bitcoin-core but i took about 9 days and eventually gone corrupted and i had to delete and restart. Any source to download through torrent or regular ...
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2answers
119 views

What should I do to increase bitcoind sync speed?

My VPS has 2gb RAM and CPU core is 1 and 1 TB HDD storage. The sync speed is very slow. Currently it has about 700 MB free RAM. bitcoind is taking about 66% of the 2GB ram. Should I add 1GB more RAM ...
3
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1answer
68 views

After a sleeping client comes online again which technique it uses to find the last common ancestor in a blockchain?

I have a Bitcoin client running on my PC and I turn it off. When I turn it on again how does it find the last common block in the blockchain so that it knows which blocks it should obtain?
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1answer
132 views

Re-index/Re-download from specific height?

I seem to have discovered corrupt blocks on one of my nodes. The node is on all the time to keep up to sync and the rest of my nodes connect to it to retrieve block data when they need to sync. The ...
2
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1answer
92 views

How to speed up first sync bitcoind?

I am running bitcoind version 0.19.0.1 on different cloud providers and it gets very slow at some point. After 300k blocks, CPU drops from ~90% to 5% and network usage drops to a minimum. I've tried ...
2
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1answer
132 views

How does Bitcoin Core know the progress of blockchain without connecting to peers?

I restarted my Bitcoin Core node after a gap of about a day and when seeing the console log, I noticed that it calculated the progress of my blockchain even before connecting to peers. The log ...
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0answers
32 views

IBD problem: Reindexing blocks and syncing starts over every time I shut and open Core

I am currently doing IBD in segments due to logistical reasons, but each time I safely shut down Core and unplug my hard drive (HDD, 1TB) and then plug it back in and start up Core, it starts in 2009 ...
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0answers
94 views

btc qt walletdump

I'd like to dump my entire btc qt wallet, while syncing, into an electrum wallet. I don't want to do it receiving address by receiving address. I already emptied out all my receiving addresses but ...
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2answers
261 views

how do you transfer your Bitcoin core wallet while syncing?

I would like to transfer my btc wallet to an electrum wallet. Syncing is taking to long.
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2answers
507 views

When will I receive bitcoins

Today I sent bitcoin to my bitcoin core wallet. I used an address under recieve bitcoins. The transaction has been cleared on the blockchain for several hours but is not showing up in my wallet. ...
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2answers
395 views

Does rpcpassword need to be non-obvious in bitcoind?

I'm syncing a full BTC node onto an external hard drive, which I'm connecting to by USB. I've created a bitcoin.conf file which sets a very insecure rpcpassword. This is literally the only field I put ...
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1answer
35 views

bitcoin core problem payment

I downloading bitcoin core on my computer. But my computer is full, and downloading is not complete. I made transfer my bitcoin to URI on bitcoin core, which downloading. But nothing came and I didn't ...
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2answers
97 views

How does a node find the active chain?

Let's say a user joins the Bitcoin network and downloads the latest state of the blockchain (all blocks, which includes the forks/uncles). How does this user find/determine the active blockchain on ...
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1answer
208 views

How can I start bitcoind without blockchain synchronization?

Suppose I make a locked wallet with 50000 pre-generated addresses. As long as I researched, only way I can collect those 50000 addresses using RPC and "getnewaddress". Feel free to correct me. I ...
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1answer
37 views

Does bitcoin qt need to synch before I can spend my change?

Sorry for the follow up question... i was trying to transfer my btc to a new wallet (believing the original one had been compromised). I sent 2 tiny test transfers of $1 then when they arrived in the ...
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0answers
277 views

Bitcoin Core Blockchain Sync Fatal Internal Error - Corrupt Block - Linux

I'm trying to perform the IBD on Bitcoin Core 0.18 and I continually receive "Fatal Internal Error" at seemingly random intervals, closing bitcoin-qt and preventing me from fully syncing. Farthest I'...

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