41
votes
How long is the first sync supposed to last?
Do following steps to check the sync state:
1.) open a new geth instance and type in geth attach
2.) now type in eth.syncing
This shows you the "currentBlock" and the "highestBlock".
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27
votes
What are the types of nodes in Ethereum?
A node is a device/program that communicates with the Ethereum network. Nodes are also known as clients. Software that can act as an Ethereum node include Parity and Go-ethereum (geth). This software ...
- 6,680
22
votes
Get a peer list for my geth node
Paste this line of code into the geth console to get a more concise version:
admin.peers.forEach(function(value){console.log(value.network.remoteAddress+"\t"+value.name)})
This will display ...
- 481
22
votes
What's the difference between node and peer?
It's a language thing about the relationship. It's like "people" and "friends". It's not that friends aren't also people. We might say that people are friends because they have a certain relationship ...
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20
votes
Accepted
are there "public" ethereum nodes? or any recommendations on hosting solutions?
Infura is the most prominent public Ethereum nodes. They run mainnet and many of the testnets. They also run IPFS servers. http://infura.io.
- 10k
18
votes
CryptoCurrency NODE.js Web3 Ethereum - Can't connect to TESTRPC
If you are using the new web3.js 1.0.0-beta, then try this (all the syntax has changed, sigh). Tested with testrpc -d.
> var Web3 = require('web3');
> var web3 = new Web3('http://localhost:8545'...
- 9,317
15
votes
Accepted
Difference between full node and bootstrap nodes in Ethereum?
Q: I know that when a new geth instance runs it connects to the bootstrap nodes. What I want to know that do other nodes download blockchain from the bootstrap nodes or nor?
A: No. Regular nodes do ...
- 40.4k
13
votes
Accepted
At any given time, how many nodes is my node connected to? As the number of nodes in the network increases, will communication between them be faster?
You can see the connected peers by typing admin.peers in the Geth console. The maximum number of peers is set using the -maxpeers n flag in Geth.
There is a discovery process based on Kademlia for ...
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13
votes
How to Compile and Deploy a Smart Contract without running a full node?
Install https://metamask.io/ and
Navigate to https://remix.ethereum.org/
Click on settings -> choose your compiler (e.g. 0.4.19+commit.c4cbbb05). Note that optimization is unchecked.
Login to metmask ...
- 1,241
12
votes
Accepted
Can chaindata be split across two (or more) locations?
Geth has a freezer as of v1.9 https://blog.ethereum.org/2019/07/10/geth-v1-9-0/
Freezer
Wouldn’t it be amazing if we didn’t have to waste so much precious
space on our expensive and sensitive SSDs to ...
eth♦
- 86.5k
11
votes
How many concurrent requests can an Ethereum node handle?
So we actually very, very rarely completely exploded. During big ICOs for instance we were seeing 200k transactions being sent via the MEW node in a single hour, which is about 55 TX/sec. Each ...
- 16k
10
votes
Are there any public/free nodes to connect a Dapp front end?
You may use Infura as a "read only / signed transactions only" node.
The use of the API is free: https://infura.io
Your may recommend your users to use Metamask Browser extension to be able to ...
- 480
10
votes
How long is the first sync supposed to last?
I think you should edit the question to ask, "How do I know when geth is done syncing?"
The question you asked was vague, but I believe this is the answer you were after:
Geth will continue running ...
- 202
10
votes
How long is the first sync supposed to last?
Assuming you are using a Linux flavoured OS, you can check the sync status as well (run this as the user under which geth is running):
$ geth --exec eth.syncing.currentBlock attach
3991639
If it's ...
- 146
9
votes
What's the difference between node and peer?
In my opinion : a network node is a connection point(endpoint) that can receive, create, store or send data along distributed network routes. In Ethereum it could be full or Lightweight.
in case of ...
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9
votes
Accepted
Parity Trace Issue: TraceDB resync required
This is a minor annoyance, parity db kill does not reset your user defaults. Have a look at this:
$ cat ~/.local/share/io.parity.ethereum/chains/ethereum/user_defaults
{"fat_db":false,"...
- 33k
9
votes
How big will the Ethereum state grow?
With the current block gas limit the chaindata grows 70 GB per year. The growth rate is limited by the block gas limit, which itself can grow and its growth is limited by the protocol (formula 45 in ...
- 11k
8
votes
Accepted
unable to connect Ethereum node even RPC port: 8545 is open
EDIT:
For other users reading this: The solution is to find in the comments of this answer - launching parameters were wrong.
http requests to the node are not supposed to return anything of use, it'...
- 3,408
8
votes
Accepted
How to connect etherwallet to my private blockchain?
I think your main issue is, you are binding only to the localhost address, are you running geth on a remote server? or are you running it on your local machine and also running the mew_relay on the ...
- 106
8
votes
Accepted
Non Deterministic External Service Call
Miners never make external calls on behalf of your contracts. Oracles are done by a user (or machine, of course) sending a tx into the Oracle
contract putting the data there. Your contract then reads ...
- 12.2k
8
votes
Accepted
Optimal sync mode for running an ethereum node that can process transactions
As per geth help document there are 3 ways you can do sync to network:
--syncmode full: Geth client will download Block header + Block data + full Validation [Is called eth full node]
--syncmode ...
- 2,174
8
votes
Accepted
Consensus Client vs Execution Client
The Execution Client listens and executes transactions and maintains the latest state and database of all Ethereum data, while the Consensus Client provides consensus (using PoS algorithm) from ...
- 4,308
7
votes
Accepted
Node's IP exposed
yes your node will be exposed to the public you could check it in https://www.ethernodes.org/network/1/nodes you will find your public IP.
hackers indeed could target your machine (Dos) and scan its ...
- 18.8k
7
votes
Accepted
Best possible way to launch the ethereum mainnet node on AWS
Here's what I am using:
AWS Instance Setup New EC2 instance
Ubuntu Server 16.04 LTS (HVM), SSD Volume Type - ami-10547475
t2.large: 2 vCPUs, 8GB RAM
250 GB (currently about 60gb is being used)
nginx ...
- 2,316
7
votes
Accepted
How to fix checksum mismatch in downloaded node for Ethereum Wallet?
Yeah for some reason the Ethereum Wallet doesn't remove the mismatched geth.exe file it has.
Download the latest geth archive file (.zip file) from here (as of writing it's 1.8.2) and then go to "%...
- 186
6
votes
How many nodes are there on the Ethereum network?
Update. As of this morning (July 31, 2017), there were 21,349 nodes, according to Ethernodes. The Etherchain Node scanner which 5chdn listed as the other nodes tracker in his Feb. 2016 answer (https://...
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6
votes
Accepted
How to run your own bootstrap node in Ethereum?
The executable to run a bootnode is bootnode. In Ubuntu, this installed alongside /usr/bin/geth in /usr/bin/bootnode.
You will have to generate a key to run your bootnode:
user@Kumquat:/tmp$ ...
- 40.4k
6
votes
Accepted
Port requirements for a Full-Node?
The Devs provided a definitive answer on which ports and protocols should be opened if you want to run a full-node:
Quoted from discussion, "Peer discovery is UDP only. This means that on 30303 you ...
- 131
6
votes
Accepted
How do nodes find peers without bootnodes?
yes there is some built-in bootstrap nodes you could check the code in github :
Geth :
https://github.com/ethereum/go-ethereum/blob/ff2c966e7f0550f4c0cb2b482d1af3064e6db0fe/params/bootnodes.go
// ...
- 18.8k
6
votes
Accepted
Ethereum node hardware requirements
The full blockchain is over 200GB. So long as you have even a relatively modest desktop CPU (or single core of one in a virtualized cloud environment), you should have no difficulty staying in sync, ...
- 6,680
Only top scored, non community-wiki answers of a minimum length are eligible