Questions tagged [synchronization]

Syntonization is the process where your node / client (geth, Ethereum Wallet, etc) receives the most up to date data from the Ethereum blockchain.

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Total number of state entries

I am syncing my ethereum blockchain using the default syncmode. I want to know how many total state entries are there because currently the highest block is 6544578 and the number of pulled states i.e....
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Syncing on Ropsten taking too long

I am running geth on a debian system and on testnet ropsten. However I notice it's not always fully synchronized. Is this due to the network, the program, or the machine itself? It's always about ...
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What portions of the block are validated in Geth's --fast and Parity's --warp mode?

When I am syncing an Ethereum node using Geth's --fast mode and Parity's --warp mode, what portions of the block are being validated as they are being downloaded? I understand that --fast and --warp ...
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download Ethereum blockchain

the blockchain now has 6,170,500 blocks. To speed up the download I'm using the method at https://mudra.cloud/ethereum/blockchain.html Is this the fastest method? Does anyone know another faster ...
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Parity - what --tracing and --pruning options use to get all blocks fastest way

I need download all blocks to be able to get all history transactions to create some statistics like mean Ether amount etc. Is it necessery to use --pruning archive and use ~ 1TB od disk? Or default ...
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Geth Mismatch of the highestBlock while syncing

While syncing on my Ubuntu 16.04 machine on ropsten yesterday the highestBlock matched the current highestBlock > eth.syncing { currentBlock: 2587196, **highestBlock: 3528808**, knownStates: ...
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Parity: with 'warp' sync enabled by default, is there still any advantage in using fast pruning?

From Parity Ethereum Documentation: Warp Sync is an extension to the Ethereum Wire protocol, which involves sending snapshots over the network to get the full state at a given block extremely ...
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How to increase stored block states from 128 to 10 000 in Geth?

AFAIK Geth preserves states for the last 128 blocks by default. I would like to keep states for, say 10000 blocks (not turning myself into archive node). Is it possible?
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Peer node is not syncing all blocks

I'm running a private network with two nodes (geth 1.8.3-stable on macOS 10.13.3). Node 1 mined 422 blocks: Node 1: > eth.blockNumber 422 Node 2 is a peer of Node 1 but Node 2 only has the ...
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How do two nodes discover each other by a third node in a private blockchain?

I'm using geth in three different containers. Note: start a container means start geth and start mining. Each container has its ports exposed. A: -p 30303:30303 -p 8545:8545; B: -p 30304:30303 -p ...
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Why does geth use so much bandwidth in light mode?

So I am running latest geth 1.8 (same thing happens with geth 1.7) and I have noticed that I am always downloading at about 2 megabytes / sec and uploading 120 kilobytes / sec. This is caused by geth ...
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geth only syncing s few blocks at a time

I am running geth with syncmode = full (because I need the full state tree of old blocks) and even though it was syncing over 200-300 blocks at a time a while ago, it is now only syncing a few blocks. ...
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Bad Block Error: Insufficient balance to pay for gas

I was syncing on full mode on my Ubuntu OS but when I was approaching the nearest latest block, I was shown this error: ########## BAD BLOCK ######### Chain config: {ChainID: 1 Homestead: 1150000 DAO:...
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What are options re: transferring ETH and ERC-20 tokens out of Mist without having to synch?

I have some ETH and many custom tokens sitting in a Mist wallet that will take many days to synch. I assume I can use the 'transfer from' function to move these tokens from this wallet without having ...
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Block Sync Progress

There is no block number listed like others I've seen. At first thought it was processed but that number is impossible? Also running eth.syncing doesn't work since blockchain is not yet fully ...
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How to check sync status

How can I check simplest way am I synced with blockchain? When I executed geth attach command and typed in: 100 * eth.syncing.currentBlock / eth.syncing.highestBlock The outcome sounds about 99....
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504 views

Geth sync stuck on a block

I'm running the go-ethereum node with geth on my server. It sync the blocks in the beginning smoothly but after some time it stuck on a block from last two days. Any help will be appreciated. eth....
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How do I verify the integrity of my local chainblock data?

If I suspect local data corruption, is there a way to verify that my blockchain data is valid and will not affect my Ethereum work and transactions? Example: I switched to a self-compiled version of ...
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655 views

What is the best parity configuration to run a full archive node on raspberry pi?

I am using a raspberry pi to download the archived version of the blockchain with parity. I've started parity with parity -d /home/xxx/data/Ethereum --pruning archive --public-node However, the ...
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iOS node not syncing with private BKC

I use the Geth framework and Swift 4 to boot a node inside an iOS 11.0 app. This node connects to my local BKC (to 4 nodes to be precise). Here are some tests I made : if I start 3 computer nodes ...
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Ethereum wallet 0.9.0 slow sync (deleting block chain works but problem eventually comes back)

Windows 8.1 with 8GB RAM, 400GB spare, i7 CPU. 100Mb fibre broadband. Bitcoin and Litecoin wallet syncs no problems. So had an issue a few weeks back where block around 4 million was syncing at a ...
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Geth not syncing to last block

i have been trying to run a node in a virtual machine. Im using Ubuntu 16.04 and have already installed Geth to it. Im running it with geth --rpc --cache=1024 --verbosity 5. When i attach to the ...
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383 views

Mist reloading chain structure from scratch

How come every time I close and open ethereumwallet it starts downloading the chain structure from scratch?
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Will I be able to mine having my whole blockchain imported using the “light” syncmode?

I was having trouble with "fast" method and opted for this mode. It seems to have worked in actually syncing up the blockchain. As I understand at this point it only downloads the current "state" of ...
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Tech challenges related to coinbase account recovery

I am trying to reacquire access to a coinbase account that I used as the repository for ethereum I was mining almost 2 years ago. I have the json file corresponding to the correct address. I have ...
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Is there any benchmark about the speed of blocks search engines?

I want to know the performance of search engines such as blockchain.info, smartbit or blockr.io I know that they are very speed but I want a real benchmark that gives the actual speed (in seconds or ...
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Does the ETC whitehat withdraw contract still work?

Apparently the withdraw period has ended. https://blog.bity.com/2017/04/03/the-whitehat-withdrawal-contract-distribution-period-is-now-reaching-its-end/ Can someone confirm this?
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Transactions not syncing among nodes in private network when volume is high

I have 3 nodes are all of them are mining. I called sendTransaction 150k times at a time on node 1. In the txpool of node 1 I see all 150k in pending but in node 2 and node 3 I can see only 50-100 ...
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Blockchain synchronization starting from scratch after switching between main network and testnet

I first synchronized the main blockchain via the CLI geth --fast --cache=512, it took several days to download around 3,300,000 blocks. Then I closed the command line geth, opened Mist, and switched ...
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111 views

Multiple DAG generation while syncing on testnet

While blockchain synchronisation on testnet, I see multiple DAG generation messages along with the percentage of DAG generated? After this when I check the eth.syncing output my value of ...
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What to do, if node sync doesn't work on MAC with Wallet 0-8-6?

Working with latest ETH wallet on MAC. For days now trying to synch the node without any result, stuck at 2,287,960. any idea how to resolve this issue?
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Problems syncing wallet

I have been unsuccessful in trying to sync a new wallet or mist. I deleted the blockchain data and started over and it seemed to be syncing quite fast again, was more than halfway done in a few hours. ...
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Ethereum node stuck can't sync on Win. 8.1

I've downloaded the latest version but can't make the Ethereum node sync. It just states: Ethereum node needs to sync.. Please wait . I've also turned my firewall off but still not working. Plus I ...
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Can EthereumJ connect with geth in my private network?

I0908 10:55:59.650726 p2p/peer.go:301] Peer c944075180d7ede0 172.21.101.100:30303: Starting protocol eth/62 I0908 10:55:59.650903 eth/handler.go:252] Peer c944075180d7ede0 [eth/62]: peer connected [...
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What do the progress bars on the Alethzero “blockchain download” window mean?

I'm exploring Alethzero. What do the progress bars in the "blockchain download" window mean? I'm seeing this: I'm assuming this relates to the progress in dowloading the blockchain but I can't work ...
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Geth stuck at “Regenerated local transaction journal transactions=0 accounts=0”,PLEASE HELP

I run a private chain with mulitpe Clique POA nodes for several days. Today I found the block can not update normally. The Geth version(executale version) info: [root@localhost ~]# geth version WARN ...
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I can see my ethereum but its not going to my wallet

My ethereum has been confirmed delivered but not in my wallet,fairly new but I have made successful transactions before,I can see my ethereum in etherscan.io 0x2ecc74c6e9c42eea14863fbc1e1d9656b339a6ec ...
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Can't send when geth started with no peers

I am trying to follow these instructions to send eth without syncing on my pc. ./geth-1.9.0 --maxpeers 0 console Then TX={ from: FROM, to: TO, value: VALUE, nonce: NONCE, gas: GAS, gasPrice: ...
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Parity synced at not existing block 4839212

I have problem with parity, cant get synchronization in archive mode to end, anything, changing arguments, max-, min-, snapshot-peers, parity verisions do not help. I have blockchain in archive mode ...
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Why would a node stop updating chain?

I am running a private network and one node seems to have stopped updating its chain. It is stuck at block 264 while the others are hundreds past it. It is still connected to the network, but it has ...
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49 views

Service to show number of state entries for syncing?

When syncing a node it would be helpful to know (an estimate of) the number of state entries in the current state to assess how long it takes to finish syncing a node. Is there a website, service or ...
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Can't catchup with Mainnet

16GB Linux, 512 GB SSD, mainly started for RPC purposes only. No mining activity. geth --datadir ./data --syncmode fast console --rpc --rpcport 8545 --rpcaddr "0.0.0.0" --rpccorsdomain "*" --rpcapi "...
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Unable to Synchronize raspberry pi node my private network

I have created a private network with 3 nodes - two nodes in computer and one in raspberry pi I connected computer and raspberry pi to same network through LAN computer ip: 192.168.122.1 pi ip ...
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Ethereum parity high IO - slow response for getBalance

We have a strange problem with parity after our smart contract addresses are increased. There is a scheduled process to check for the transaction records and we have web3j calls to getBalance/...
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Best way to support restoring of all the keys of a mapping

I have a contract, in which I maintain the keys of a mapping in two different ways: Storing each key in an array Emitting an event for each key I do this in order to be able to restore the keys (and ...
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Geth syncing keeps failing at block number 7279144

Here's the log. INFO [03-04|04:55:46.685] Imported new block headers count=0 elapsed=5.165ms number=7279336 hash=87c04b…cde65c age=3d12h45m ignored=192 INFO [03-04|04:55:46.728] ...
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Private blockchain losing access to older blocks

So, my private blockchain became out of sync and one of the nodes reset to block 0 – it then synced up with the other nodes. The node that went to block 0 is the node that is providing the rpc port ...
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Node replication

In a multi node network (4 node), if one of the node is down and comes up with higher block number and with faulty data . Will all other three nodes replicates with the failed node data. or all the ...
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Wallet stopped syncing on block 7,160,687

my Mist/ Ethereum Wallet version 0.11.1 stopped process synchronisation on block 7,160,687. What do I have to do to get it going?
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Is it possible to call a Contracts function from a set setTimer? Web3JS

I want to be able to call a function of a contract every 60-120 seconds, in my JavaScript code I have a set timer that runs for down a timer from 120 seconds down to 0 by subtracting 0.01 every 10 ...