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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1answer
314 views

cpp-ethereum (Homestead) starts resyncing blockchain

I just installed cpp-ethereum 1.2.2 in order to upgrade to Homestead. When eth is started it begins to re-sync the blockchain from block 1, while the whole blockchain is already on my machine. Is ...
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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?
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0answers
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What is the difference between “geth” and “geth --fast”? [duplicate]

EDIT : I hadn't see the other question but this one ain't a duplicate because I'm asking here, precisely, if the state differs and if it does, what are the implications. The answer to that question ...
13
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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....
8
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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 ...
4
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2answers
366 views

Mist 0.5.1 synchronization problem on Windows

I'm running Mist on Windows 10. I have been trying to download the blockchain since yesterday and the process is too slow and cumbersome. I switched off the firewall and I set the clock and I started ...
4
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1answer
771 views

Can I do a pruned fast sync?

I would like to do a fast bootstrap of the Ethereum blockchain with minimal disk space usage. Can geth do a pruned fast sync?
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?
7
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1answer
3k views

Is there a downloadable Ethereum bootstrap?

I am trying to synchronize a full node, and this is going very slowly, the progress alternates between bursts of high CPU usage (which is fine, it is heavy but importing), and long times with nothing ...
6
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1answer
962 views

Will I be able to mine having my whole blockchain imported using the --fast flag? (Geth)

Having the same problem as in this question: Corruption on data-block while synchronising I restarted my synchro on the fresh/empty data directory using the --fast flag. According to this answer: What ...
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 ...
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0answers
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How to fix Mist node sync problems? [duplicate]

I am having problems syncing Mist. I have tried versions 0.3.9 and 0.4.0. I have been syncing for 4 days and I'm still stuck at 750.000 blocks of 1.000.000 blocks. I'm using Windows 10 64bit. Any ...
10
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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?
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2answers
490 views

I sent a transaction and got a hash, but blockchain explorers don't see it. What happened?

I used in the eth client web3.eth.sendTransaction({from:sender,to:receiver,value:amount) to try send some ether, typed yes to the question, then got a hash number ...
2
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2answers
687 views

Transaction using geth is stuck

I have created a wallet using geth on my mac. I have sent a small amount from Kraken to that account but its stuck on "sending". Do I need to download the blockchain first on my node so it can be ...
4
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1answer
1k views

Why do Ethereum clients download the entire blockchain?

Lets say that I am not interested in mining but instead just interested in one contract and its latest state. Why shouldn't my client discard all the other state on initiation, and also ignore any new ...
8
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2answers
3k views

Is there any SPV client for ethereum?

I am looking to move some ETH from an exchange to a wallet for which I control the keys. I don't, however, want to download the whole blockchain. Is there a good SPV client I can use?
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 ...
6
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1answer
265 views

Is there a way to interchange between the Mist wallet and geth without having to redownload the whole blockchain?

I already have the ethereum wallet running on my laptop, when I exit it and go to run geth in terminal it redownloads the entire blockchain again? Same thing happens when I go from geth to the wallet. ...
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 ...
9
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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
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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 ...
5
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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?
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0answers
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Why is my node taking so long to sync? [duplicate]

I downloaded the ethereum wallet, and its taken a few days yet its still syncing. Im on block ~701,000 thus far. Is something wrong? Is it supposed to take this long?
71
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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). ...
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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?
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?
13
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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.