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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What is my progress towards full sync?

I somehow is running geth with full sync. >geth --syncmode full --datadir F:\ethereum-full --keystore F:\keystore --port 30303 --nousb INFO [09-28|10:38:47.956] Starting Geth on Ethereum mainnet......
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What is the criteria to resync chain using proof of stake?

In PoW, nodes always resync their own chain to the longest chain in the network in order to respect the work the miners have done. In PoS, as I understand in its simplest form, the miner with the ...
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solidity equivalent for new thread

I want to create a contract, which has a deposit function. But I also want, in the constructor, to start a "thread" that polls an external data source (via oraclize/chainlink or similar) at ...
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Node not syncing on Private Blockchain

Node 1 is mining but Node 2 is not syncing Running admin.peers on Node 1 gives: Running admin.peers on Node 2 gives: Both Nodes are using same genesis block When starting console on Node 2 I used --...
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Can I stop geth when it is halfway done and restart it without loosing all the first half of data?

I have started geth (fresh install) using this command: geth --datadir "my/path" I'm halfway done with sync and would like to restart my PC. Will I loose all the data accumulated so far or ...
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openethereum node disk usage

Using openethereum to sync the eth blockchain, after synced and now the disk space keeps growing 20G per day. The .log file in the db folder keeps growing. After restarting the node, the space will be ...
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Why does ethereum chaindata sometimes sync while syncing?

I am doing a fresh geth 1.9.18-stable sync, which I believe is fast by default. I am keeping an eye on the size of the .ethereum/geth/chaindata/ directory and have noticed that it does not increase ...
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blockchain sync failed and stuck

My machine was crashed and rebooted, but after rebooting, geth sync repeatedly failed at a block, I checked the block number, hash is right though, what should I do? INFO [08-08|09:54:23.184] ...
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Why is my full node stuck always out of sync?

I have a 16g ssd ubuntu, I run the command: geth --ropsten --syncmode=full --gcmode=archive Checking the "eth.syncing" in the console attached, I get always current block is ~100 blocks ...
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block syncing current is smaller than starting why?

I'm sync the chain after a power cycle, so current is behind highest for sure, but I also saw that current is falling behind starting block number, how is this possible? starting is the highest on ...
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What is the best way to store data/information while writing smartcontract?

Smart contracts are immutable. Unless we're 100% sure that our smart-contract is fully functional without any exception we never want to push that in the main net. That's why we have public test net. ...
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Is Ethereum fast sync feasible to get logs

I want to get the logs of an contract address by filtering the even with transfer Event. I cant use Infura for its restrictions and limits. So i want to sync my own ethereum node for myself. Since my ...
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Syncing geth 1.9.15 took too long on HDD raid-0

I've been running full node on a server with this config: Centos 7 11 Tb hdd raid-0 32 Gb ram and I'm using geth 1.9.15-stable-0f77f34b I'm trying to be archive node but syncing took over 1 months ...
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is “newBlockHeaders” in web3 emits a legit block?

I'm using web3.eth.subscribe('newBlockHeaders') to track transaction I sent to the blockchain. My question is that is the block emitted from "newBlockHeaders" legit or in other words, the block has ...
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geth full node taking forever to sync

For three days I've been trying to sync a full node. Syncing the last two days has taken about six hours a day. At this rate I won't be able to sync it. It's behind "age=3y8mo5d". This is the ...
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Fast synch mode slowed down after 200Gb

It took 2 days to get to 200gb on geth fast synch mode. But now im moving with approx 5gb a day with a decent internet speed around 100mb/s in Lan. I disconnected and now running on 25mb/s with wifi....
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Geth server syncs itself very slow on SSD storage

This is the second time I've lunched a Geth server with full mode on a server with the resources below: 4Core CPU 16GB RAM 400GB SSD But server keeps staying arount half of highestBlock and its ...
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Is it possible to initiate Geth server from a specific block instead of genesis block?

I tried setting up Geth servers in full node different times, and all of them are always behind half of total max block. So, they cannot be synced easily even after weeks. I would like to know can I ...
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Geth stops working after being fully synced

I have a Geth server in full mode. It was synced fully and I was using it normally for weeks. Today, I wanted to check the synchronization status, so I used geth attach command to enter to the Geth ...
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Number of state entries needed before geth node is synced up with Ropsten

I am currently syncing a Geth node with the Ropsten network. Currently the download in the terminal show a neverending stream of Imported new state entries. I understand that I have to wait for all of ...
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How to duplicate a Geth server?

I have a Geth server which is fully synced, but the second server I have lunched cannot being synced after 2 weeks! I don't know why is this happening, but I decided to test another way. I setup a new ...
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Can we improve the performance of Geth server by setting maxpeers to 0?

I've lunched a Geth server in full node. I think the performance of machine for syncing is not acceptable and needs much more time to be synced fully. I would like to know if I set maxpeers to a low ...
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Why knownStates and pulledStates are always 0 on my full node?

It's the second time that I run a Geth in full node. The first one got synced fully, but the second one did not sync after a week. Both servers have the same configuration and infrastructure. Using ...
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What's the status of Ethereum Light Client?

Is there any stable Ethereum Light Client? Which one is production ready? What's the status and the roadmap? Moreover, I'm looking for some metrics related to a Light Client: Runtime resources usage (...
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Is it possible to sync an archive node with HDD in 2020?

Many bloggers have pointed out that it is almost impossible to sync an ethereum archive node using a HDD.But most of those blogs were published in 2018. I've seen several version updates of geth ...
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Parity Kovan Node suddenly came to a halt ( untimely stopped )

Parity version: version Parity-Ethereum/v2.7.2-stable-2662d19-20200206/x86_64-unknown-linux-gnu/rustc1.41.0 Operating system: Linux Installation: one-line installer Fully synchronized: yes Network: ...
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Syncing keeps behind the blockchain

I am trying to run a geth node just to learn what I can do with it. I started geth with fast syncing. The problem is that it never syncs and always lags behind ~100 blocks. My datadir is on my HDD and ...
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Can chain states be processed faster or in parallel? (geth full node syncing)

I am trying to understand more about chain states. Basically Geth is capable of downloading blocks pretty fast now, but getting "known" and "pulled" states takes much longer and seems to be ...
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Can I connect to testnet after synchronization finished on mainnet?

I just finished block synchronization on mainnet by default, but I realized I want to try on testnet first. Should I do synchronization on testnet again? Or how can I connect to testnet? Thanks a lot....
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What is the recommended read/write speed for an SSD when syncing an archive node?

I am planning to sync an archive node for research purposes and am preparing to buy the hardware. How does the read/write speed of the SSD affect the sync speed? Is 500 MB/S enough, or would an ...
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Running geth - ssh doesn't work

The Ethereum light node is synced by geth, but when we tried to sync it we lost ssh connection. We assumed that while it is syncing it is impossible to connect via ssh to computer. If anyone has any ...
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Private Blockchain Chain Spec Sanity Check Please

A private blockchain running for two years runs find on Parity 2.3.9. When upgrading a node to 2.4, sync stops. Peers are still strong (25) but block import repeats at Block X where Block X is the ...
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Ropsten Blockchain Size on Disk December 2019?

Hello what is the size of the Ropsten Blockchain, on disk, using Parity with full trace on? (Info required to provision a VPS).
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geth sync stuck at 2,700,000 [duplicate]

It all ran well before 2,700,000 but when comes above 2,700,000 hellish... INFO [12-21|00:08:43.253] Imported new chain segment blocks=2 txs= 5 mgas=0.356 elapsed=30.309s mgasps=0....
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How to test chain reorganization with testrpc?

I am working on blockchain synchronization script. I need a way to make reorganization programmatically for testing purposes. Is there such functionality in some testrpc?
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How much more it will take for Ethereum wallet to Sync - 2019

I has been a week when I tried to Sync Ethereum on SSD VPS. Here are the details - Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): ...
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Geth sync at 99.99%, Latest block is 0, Importing state entries for a long time [duplicate]

I know its a common issue but I wanted to post to see if there is an updated solution. I am running: geth --rinkeby --rpc --rpcapi="personal,eth,network,web3,net" geth attach http://localhost:8545 ...
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Ethereum classic node syncing, still around approx 100 blocks behind even on SSD

Does somebody know what to do? SSD disks are not enough? How much cache do I need to allocate for it to sync in time? Still around 100 blocks behind and 0/0 blk/mgas sec, sometimes 1 / 0 blk/mgas sec. ...
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Question on initial sync and Freezer (SSD and HDD)

I've kicked off a fresh fast sync of Geth v1.9.2 and after 3 weeks it's still pulling states (state trie). As per the documentation you can use the Freezer with a HDD as it references old data so ...
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Synchronization: why startingBlock is ahead of currentBlock?

> eth.syncing { currentBlock: 908716, highestBlock: 928604, knownStates: 0, pulledStates: 0, startingBlock: 908891 } It looks like synchronization started from block 908891, though the ...
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Conflicting reports on sync mode and inability to see balances

I've been trying to maintain a full node for several months. It seemed to be working until I noticed zero balances this morning. etherscan.io site confirmed that balances are not zero, so ...
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what will happen to transactions on smaller length chain when peered with longer length chain in private ethereum

what will happen to transactions on smaller length chain when peered with longer length chain in private ethereum? Below is the scenario Step 1: I have started Ethreum private chain in 2 different ...
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What are the rules on persisting old transactions?

If a new node joins the network and attempts a full sync, it requires all transaction information from genesis to build up its chain state. To do this the transactions it receives must be the ...
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Geth returning balance 0 [duplicate]

I started my geth using fast sync first and then normal sync once it was almost synced. 'currentBlock' is not increasing since hour and 'highestBlock' keep on increasing. geth --testnet --rpc --cache=...
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Ethereum fast sync and wallet balance?

I'm planning to run a Ethereum server for getting wallet balances at a specific time, which type of node should i run, fast sync will work ? or should i go for archive node ?
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geth never completes syncing for rinkeby

My aim is to synchronise a full node for the Rinkeby network. It seems that geth does not finish synchronisation. I have had it run for over three days, but it is stuck at the last few blocks. > ...
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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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Parity syncing in archive mode stuck at block 4839206

I am running Parity inside docker in pod in Kubernets on Google Cloud. The pod is using disk with 2700 GB for storing Ethereum blockchain, and currently disk has about 2100 GB free. Unfortunately for ...
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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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