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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71
votes
9answers
92k views

Help with very slow mist sync

I have seen other posts in reddit where users experienced slow sync times. I am using windows 10 and version 3.7 (I saw on gitter that other users on windows 10 had trouble with version 3.8 crashing). ...
49
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5answers
76k views

How can I get a geth node to download the blockchain quickly?

I'm running a geth node on slow hardware. At the current rate of progress it could be several days before I can download all the blockchain. Is there a way to get it to synchronise more quickly?
94
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2answers
85k views

What is Geth's “fast” sync, and why is it faster?

One of the answers to this question suggested using Geth's --fast flag to help quickly synchronise the block data. How does the flag work, and how does using it speed up the synchronisation? Are we ...
23
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2answers
44k views

Why is my node synchronization stuck/extremely slow at block 2,306,843?

Using macOS 10.12.1 with Ethereum Wallet 0.8.7, nodes are connected but Sync doesn't even start. Stuck at block 2,306,843. What can I do? Please keep in mind, I am neither a coder nor a tech geek.
45
votes
1answer
44k views

What is Geth's “light” sync, and why is it so fast?

This question is in a similar vein to the past questions about geth --fast and parity --warp. There was a recent question where the OP wanted to do as little syncing as possible, and one of the ...
8
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5answers
9k views

Sent ETH to my Wallet, but it did not show up

Note: This question was initially asked for Mist, but is in general also true for all other wallets like Ethereum Wallet, Etherwall, Parity, Harmony, etc. I sent ETH from MyEtherWallet to my Mist ...
36
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10answers
27k views

How can I find out what the highest block is?

I'm syncing up a new node. How can I find out what the latest block is so that I know how far I've got to go?
22
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4answers
16k views

How can I empty the blockchain?

I am trying to do a fast sync using geth --fast but I am getting this message: blockchain not empty, fast sync disabled How can I empty the blockchain to allow for fast sync?
14
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2answers
9k views

What is the parity light pruning mode?

Parity offers four different pruning methods: archive, basic, fast and light: --pruning METHOD Configure pruning of the state/storage trie. METHOD may be one of ...
11
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1answer
4k views

Why isn't fast sync the default?

As I understand, fast sync has all the security guarantees of a full sync, but is faster. Is that correct? If so, why isn't fast sync the default?
23
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1answer
29k views

Geth node starts to sync from the beginning after fast sync

I have synced using the --fast command. Now how should I proceed? I tried stopping it, and then running geth --rpc but it says: Last Header #1311471 Last Block #0 Fast Block #1310224 What should I ...
19
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1answer
3k views

Difference between a pruned and unpruned blockchain

At the Berlin Blockchain Meetup, Gustav Simonsson teased the Homestead release coming soon (tm) and we were discussing blockchain bloat and the current size of the Ethereum blockchain. We discussed ...
15
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2answers
10k views

How much faster is it to sync with --jitvm?

geth help has: VIRTUAL MACHINE OPTIONS: --jitvm Enable the JIT VM The impact of --jitvm has been unanswered and I'm looking for answers to these 3 specifically: How much faster is geth ...
15
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4answers
18k views

Possible to store the blockchain in a different directory?

I'm running geth on Linux within a Chromebook. The blockchain is being stored within ~/.ethereum, along with other important files. Problem is, the storage capacity on my Chromebook is quite limited ...
11
votes
6answers
21k views

Is there a quicker way than geth --fast to download the Ethereum blockchain?

I had the Mist client installed, but it hadn't been updated in a few weeks so I tried renaming the chaindata folder (instead of deleting it) and downloading the blockchain with geth --fast as that is ...
30
votes
6answers
41k views

How long is the first sync supposed to last?

I've been running Geth (latest version) for around 12 hours and it's still not finished. The command prompt shows this : INFO [05-21|12:05:00] Imported new chain segment blocks=1 txs=...
22
votes
1answer
7k views

What is Parity's “warp” sync, and why is it faster than Geth “fast”?

A follow-up of one of the classic questions on this site: One of the answers to this question suggested using Geth's --fast flag to help quickly synchronise the block data. Now, parity comes with ...
11
votes
3answers
18k views

how do you know your db is synced in geth?

In order to answer this question there is a need to get the timestamp of when the database is synced with geth. I can think of two ways of doing that : find the 1st occurrence of 1 block in the geth ...
4
votes
1answer
2k views

Not syncing due to “unhandled trie error: missing trie node”

Having an issue. Was caused by Avast blocking a file after I sent some Ether to Dao. Have removed Avast now that I understand it was messing stuff up. Restarted computer... now when i try to sync it ...
14
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3answers
10k views

What's the proper way to wait for a transaction to be mined and get the results? [duplicate]

I'm using react to write the frontend for my dApp, and doing this to (attempt to) update react's state via an asynchronous sendTransaction call: var thisJS = this web3.eth.sendTransaction({from: ...
9
votes
2answers
6k views

Corruption on data-block while synchronising

My home server's been down for a couple of days while I do some upgrades. I'd had Geth running in one of the terminal windows, but shut it down gracefully using exit before taking the server offline. ...
5
votes
3answers
5k views

Can I safely interrupt and restart fast sync in geth?

I am new to Ethereum and trying to get set up a new node with geth (using 1.6.5-stable). I am running geth --fast --cache=1024 and so far have been syncing for around 3 days (Win 7, 6GB RAM). I see ...
3
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2answers
3k views

When transferring Ether, who needs to be in sync with the blockchain?

A transfers ETH to B: who needs to be in sync with the blockchain? My comprehension is that A only needs to be sync, is that correct ?
3
votes
1answer
2k views

How can I create a list of peers from my syncing geth node to manually paste into my non-syncing geth node using the admin.addPeer() command?

I have an Ethereum node that is not syncing to the Ethereum network. It is possible that there are some issues with the bootnodes - refer to geth does not sync out of the box . How can I easily ...
7
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2answers
4k views

Sync blockchain while mining?

I'm new to ether mining. Do I have to sync with the blockchain while mining? Currently I'm using ethminer for solo mining with GPU and geth to sync with blockchain.
6
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2answers
2k views

Blocks are not being downloaded [duplicate]

After the attacks the clients are shit. At the moment, I am unable to download any blocks, except if I delete all the chaindata and it starts again. I have less than 6k blocks left to download and I ...
5
votes
1answer
2k views

geth does not sync out of the box

I have a fresh new installation of Ubuntu 16.04 and I've followed manual to setup geth sudo apt-get install software-properties-common sudo add-apt-repository -y ppa:ethereum/ethereum sudo add-apt-...
3
votes
2answers
691 views

Where can I go if I still have problems with syncing the blockchain?

I've searched online, this Stack Exchange, including synchronization, and am still having problems with syncing Geth. Where else can I look and try to get help?
13
votes
3answers
7k views

Why doesn't my Ethereum node have any peers?

I'm running an Ethereum node using geth and it can't find any peers. I've already tried the time sync command suggested on the wiki. My bandwidth is good.
8
votes
1answer
1k views

Can one use ethereum as a client over Tor?

Does ethereum work when there is only TCP available? Can one use ethereum as a client over Tor? It does not work for me. Using Whonix. So running the traffic over Tor is not an issue. Blockchain ...
7
votes
1answer
1k views

Can anyone help guide on running two geth clients on the same box and same network?

I am working on Mac OSX. I have the CL tools installed and I can start one geth client on a private network. Mining works. Wallet features work. I am able to successfully mine eth and deposit it into ...
5
votes
1answer
748 views

Why is fast sync not working with geth 1.1?

When I run geth --fast I get: Incorrect Usage. geth [global options] command [command options] [arguments...] VERSION: 1.1.0 [...] flag provided but not defined: -fast How do I fix this?
4
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2answers
2k views

Missing trie node only on some blocks > is it possible to resync a specific Block?

I'm trying to trace some transactions and I'm getting the "Missing trie node" warning only on some specific blocks, but not on others I've read a solution that suggests to delete the chaindata folder ...
2
votes
1answer
2k views

Downloading full blockchain again after using geth --fast on 0.7.4 [duplicate]

I've downloaded the newest mist browser on a new pc and used geth --fast. After fully syncing (which was about 1,5 hours) the syncing started from 0 again, but this time slow, downloading the whole ...
28
votes
4answers
25k views

Can I download the whole blockchain from somewhere?

Bitcoin used to offer sharing/downloading a bootstrap.dat which contains the whole blockchain. Are there alternatives to getting it trickling through the peer-to-peer network? Can I just download it ...
27
votes
6answers
23k views

How to check my sync status on Geth 1.5.5, Raspberry Pi 3

Have a Geth 1.5.5 node running on a raspberry pi 3. When I type in sudo systemctl status geth I'll get ever changing time and block information. Neat, but how do I know when I am synced up? Is ...
13
votes
2answers
8k views

How to reduce chaindata database size?

Currently chaindata size is more then 10.02 GB. Is there any solution to reduce the size of stored data? Is there a way to store particular database and keep entirely the functionality of client (e.g....
5
votes
2answers
786 views

Is it recommended to run Ethereum supernodes?

In the early days of bitcoin there was a demand for system administrators who were able to run supernodes to support the network with stable nodes and high bandwidth. Litecoin is still recommending ...
16
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4answers
7k views

Synchronisation failed, dropping peer

Whenever I attempt to run geth on the command line, it seems to have trouble syncing with the blockchain. I am absolutely a novice so I could be completely overlooking. I am getting these warnings ...
8
votes
3answers
15k views

Ethereum Node Stuck, Can't Sync

I'm using a Macbook Pro OS X Version 10.9.5 and am unable to get through the syncing phase. "Ethereum node needs to sync, please wait..." is exactly what is prompt but regardless of the time I wait, ...
3
votes
2answers
1k views

What do the geth sync messages mean?

So far I've gotten these rather cryptic messages while syncing: Imported new block headers Imported new block receipts Imported new state entries Stalling state sync, dropping peer What do they mean?...
10
votes
1answer
5k views

How do I find out how big the chain structure is for a particular block?

I'm downloading the blockchain from scratch, and it's been stuck at 2442432 for a couple of hours now. The chain structure keeps on downloading though. Is there a way to find out how much of that is ...
5
votes
2answers
3k views

Geth Fast Sync imports blocks that have already been synced

I keep having this problem where geth fast syncs normally importing headers and receipts (not blocks) up until a certain point at which it starts importing blocks that I had already synced a long time ...
4
votes
1answer
1k views

Syncing slow to a crawl (2048 blocks in 2 hours)

I had no issues before, but my syncing has gotten incredibly slow with geth. My system time and date are good (set by ntp) so that shouldn't be the issue and my Internet connexion works fine. It took ...
3
votes
0answers
449 views

Ethereum blockchain size as of March 2017 (geth --fast and others) [duplicate]

What is the size of the Ethereum blockchain as of March 2017? I am just starting with geth --fast -cache=1024, but I would also be interested in other clients or other downloading methods. I know ...
1
vote
2answers
567 views

Transaction mined or not?

Several hours ago I sent the transaction 0xe9cca30f9d8d2040a3c6c5ceb6601240b0c095a47ac9117dd34e36c0d66be2f7 into Ethereum testnet. When asking a node about it, everything seems right (confirmed ...
10
votes
1answer
2k views

Can I run Geth without syncing?

I want to test some api calls using web3.js and so I am using geth as HttpProvider. Can I start geth without the syncing? Is something like geth --nosync --rpc available?
5
votes
3answers
1k views

Why can't I send ETH? (Mist 0.7.2 OSX Yosemite)

My account has thousands of ETH in it, but MIST says this: "We can't estimate your gas usage properly, as you need at least 1 ether in your account." My Mist and geth are all updated to the latest ...
3
votes
3answers
1k views

Lost ether: wallet on some other chain

Yesterday I decided to move my Ethereum coins to my coinbase account from my PC based Ether wallet from Ethereum.org . I had 107ish coins. I sent 1.2 to my coinbase address as a test and they arrived ...
3
votes
0answers
173 views

Ethereum wallet shows “no accounts yet” and 0.00 balance [duplicate]

I last used Ethereum wallet in June or July this year. Yesterday I upgraded on macOS to 0.8.7. It is syncing very slowly; at this rate it will take a week to finish the remaining 189,000 blocks. In ...