Questions tagged [synchronization]

The process of bringing a Monero client up to date with the blocks it is missing from the block chain.

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29
votes
4answers
27k views

What is the fastest way to synchronize the daemon?

Running the daemon without any modifications can take a long time to synchronize. Are there any faster options for synchronizing the daemon with the network?
17
votes
1answer
13k views

I forgot to upgrade (from CLI or GUI v0.13 to CLI or GUI v0.14) and, as a result, accidentally synced to the wrong (alternative) chain

I forgot to upgrade (from CLI or GUI v0.13 to CLI or GUI v0.14) and, as a result, accidentally synced to the wrong (alternative) chain. How do I resolve this issue?
16
votes
1answer
26k views

My blockchain is stuck, how do I “unstuck” it?

During the last few weeks a common, reoccurring, question seems to be how to get one's blockchain "unstuck". This guide will, hopefully, provide some assistance in doing so.
15
votes
1answer
812 views

Why does `monerod` on Raspberry Pi 3 with a copied LMDB not catch up with new blocks?

I have both a macOS system and a Raspberry Pi 3 on the same home network. Both are having Monero release 0.10.1.0 installed. I stopped the daemon on macOS, and then copied the entire .bitmonero ...
12
votes
3answers
5k views

Do I need to sync the entire blockchain before I can send a transaction?

I have a cold storage wallet that I have only used to receive payments. After recovering my wallet with my mnemonic seed, do I need to synchronize the entire blockchain before I can send a ...
12
votes
1answer
685 views

Meaning of “62 days ahead” message after full node has finished synchronizing

What does the message "62 days ahead" message mean? My full node has finished synchronizing (I confirmed this by comparing my block height with both moneroblocks.info and Explore.MoneroWorld.com)
11
votes
3answers
3k views

Why does monerod consume so much CPU?

I'm on an i7 core but monerod consumes up to 300% CPU at times. When I am catching up on the blockchain, it renders my computer nearly unusable. Is this normal? When the chain is synced, CPU use is ...
11
votes
1answer
30k views

How long should the GUI wallet take to synchronize?

This is my first question (on any StackExchange), so sorry if it's 'stupid' or already answered somewhere else. I've just downloaded the beta GUI wallet (MacOS) and it is now 'sychronizing blocks' (...
10
votes
1answer
11k views

How do I move the blockchain (data.mdb) to a different directory during (or after) the initial sync without losing the progress?

I am currently performing the initial sync to the default directory, but my drive is nearly full. How do I move (and subsequently sync) the blockchain to another drive without losing the progress?
8
votes
1answer
818 views

Why is it faster to synchronize from the network than to import from a raw data file?

I've read some places that its faster to synchronize from the network than to download and then import a raw blockchain file. Why is it faster to synchronize from the network?
8
votes
1answer
2k views

Why does the option “--verify 0” for monero-blockchain-import not work?

When I use the command ./monero-blockchain-import --verify 0 --input-file ./blockchain.raw it says "Failed to parse arguments: unrecognised option '--verify'".
8
votes
1answer
125 views

Is it possible to build a BitcoinJ style library that will help enable lightwallets?

As I understand it, lightwallets are inherently difficult for CryptNote currencies because the wallet has to scan every block in the blockchain. This means they can't just request block headers to ...
7
votes
2answers
1k views

Monero Height at a standstill

My Height seems to be stuck here 335459/335459 (100.0%) on mainnet But when I check the current height online it's 1289240 Could someone help me?
7
votes
1answer
195 views

Do checkpoints make initial blockchain sync faster?

Do the checkpoint hashes in checkpoints.cpp make the syncing go faster? Why or why not?
6
votes
2answers
739 views

When syncing Monero's blockchain from scratch, why does it begin fast and end slow?

I'm currently syncing from scratch, and noticed that the first million blocks or so synced really fast, but the final blocks take forever. Why is this?
6
votes
1answer
2k views

Running monerod with --block-sync-size 10 syncs a lot faster, why?

Running monerod 10.3.1 on a laptop with a Core i5, 8GB RAM and a DSL connection with 16 MBit downstream and it takes roughly 18 minutes (!!!) for synching 200 blocks when running in default mode (i.e. ...
6
votes
2answers
327 views

Started monerod 0.10.1 on an AWS EC2 t2.micro instance, why does it sync so slowly?

I started monerod on an AWS EC2 instance of type t2.micro. This means it has 1GB of RAM, which should be enough from what I've read in various places. It is syncing (from scratch) since two days ...
6
votes
1answer
154 views

What are precomputed blocks?

When monerod is initializing, it says Loading precomputed blocks: 1200001. What are precomputed blocks? Where are they loaded from?
6
votes
1answer
415 views

Since monerod through Tor is slower (on Whonix), would importing the .raw be faster?

My understanding is that importing a blockchain backup with Monero and other cryptocurrencies takes about the same time it takes to sync normally. The only reason I could see for someone doing that, ...
6
votes
1answer
1k views

With the Monero Wallet GUI is it suppose to start synchronizing every time you open it even after it completed synchronizing the 1st time i opened it?

Even though my question(according to stackexchange) appears subjective and is likely to be closed, Im still asking it because its driving me crazy and i just want someone to help me PLEASE. When I ...
5
votes
1answer
596 views

What does it mean when the Monero daemon says “LMDB Mapsize increased”?

I had an old daemon open and it was giving me the various SYNCHRONIZED OK messages that I was used to. Suddenly it said "LMDB Mapsize increased. Old: 13312MiB, New: 14336MiB". What does this mean?
5
votes
2answers
137 views

Should we synchronize blockchain from scratch after every scheduled hard fork?

Should we synchronize blockchain from scratch after every scheduled hardfork or just update the binaries and synchronizing blockchain from where it was synced with pre hardfork binaries?
5
votes
2answers
247 views

Is there any way to force someone to rescan their wallet?

I'm asking in the context of Poloniex having to rescan their wallet conveniently at the time of Monero's all time high in volume, reference: https://www.reddit.com/r/Monero/comments/4z5sbo/...
5
votes
1answer
102 views

LMDB conversion vs downloading from scratch

What are the speed and security differences between a pre LMDB (0.8.6) to LMDB (0.9.4) conversion vs syncing the blockchain from scratch? I have a Linux Ubuntu desktop with 8GB RAM a 512 GM SSD and a ...
5
votes
1answer
3k views

Monero sync too too slow

I'm syncing monero for the first time. I have an SSD on my syncing PC. I left all day syncing plus all night. I still got 253624 blocks to sync, and letting it all night only synced 400 blocks. This ...
5
votes
2answers
153 views

Why does the daemon say that I'm now syncronized with the network while I'm still missing some blocks?

This is what I observed: P2P2, P2P4, and P2P5 have more blocks than me. There's also a [P2P6] message without any indication of block height, and right thereafter the message that I'm now ...
5
votes
1answer
184 views

How can I increase the database cache size?

I'm running a full node on Windows and have plenty of RAM, is there a switch I can use to allocate a larger cache size? (Similar to -dbcache=X in Bitcoin/Litecoin core) The Monero synchronization ...
5
votes
1answer
106 views

Do Monero and other Cryptonotes compile and sync on big endian CPUs?

I know someone who is having some trouble with an IBM 390x CPU (which is big endian), and an altcoin. They are able to compile, but unable to start syncing as they get this error when the daemon tries ...
4
votes
2answers
1k views

Synchronizing painfully slowly

monerod on my hybrid server is synchronizing painfully slowly, on the order of only about 20 blocks per minute. Port 18080 is open and I have 11+2 connections (varies). Do I just need to wait or is ...
4
votes
1answer
1k views

How can I change the default log level from my Monero daemon?

How much of an impact will my log level have on syncing time? Are there any security concerns with using a log level of 0 or 1?
4
votes
1answer
266 views

Peers often report unknown top blocks. How can I find more reliable peers?

The daemon regularly reports top blocks that are years in the past. For example (IP addresses are anonymized): 2016-Oct-23 06:13:27.789171 [P2P2][123.45.67.89:18080 OUT] SYNCHRONIZED OK 2016-Oct-23 ...
4
votes
1answer
7k views

“waiting on daemon synchronization to finish” Issue

In the GUI, it pops up "waiting on daemon synchronization to finish" but has been saying this for over an hour now. Am I being too impatient? In the past, it usually syncs up in a couple minutes. I am ...
4
votes
1answer
304 views

Initial blockchain sync fails with message: [P2P6]Attempt to get hash from height 787402 failed — hash not in db

I've attempted to get monerod running on one of my Linux boxes, and keep getting an error during the initial synchronization. I've deleted the .bitmonero directory as well as the working directory, ...
4
votes
2answers
921 views

Lost monero money after switching wallets

I am a monero noob, please help. I could not send funds from my MyMonero wallet, so as everyone suggested I imported the keys in the Monero GUI wallet. Problem is, it shows a 0 balance. When I tried ...
4
votes
1answer
2k views

Why is monerod so slow to sync the blockchain?

Only a few days can take more than an hour to sync. It couldn't simply be a matter of downloading x MBs as I download much larger files much faster. Is there that much processing going on, or have I ...
4
votes
1answer
618 views

How do I constrain memory usage during initial blockchain sync

I'm trying to get monerod up and running on a VPS with 1gb of RAM. My understanding is that once the chain is synced, monerod's memory usage should be quite reasonable. However, during the initial ...
4
votes
1answer
5k views

How to synchronize the GUI wallet using the blockchain bootstrap

I'm having trouble trying to sync the GUI wallet with the blockchain. I'm trying to use an old 2008 Macbook which I had lying around, with OS X El Capitan (HDD, 8gb RAM, 200gb free storage). I've ...
3
votes
1answer
4k views

Sent to wallet address before synchronization?

I sent some XMR soon after downloading the gui client (unknowingly) before completion of the daemon synchronization... Will my XMR appear eventually or are they lost?
3
votes
2answers
419 views

You are now synchronized with the network.

when i synchronize with the network I receive this message: "You are now synchronized with the network. You may now start monero-wallet-cli." But monerod.exe is still synchronizing: SYNCHRONIZATION ...
3
votes
1answer
4k views

Changing block-sync-size within GUI or running monerod

This answer explains how to start the daemon with a specified block-sync-size: ./monerod --block-sync-size 10 How can I do the same thing from the Monero GUI or from a Monero daemon that is ...
3
votes
1answer
1k views

Monerod is syncing 1 block at a time seemingly backwards?

Monerod is syncing super slowly since the last week or so. It goes one block at a time and each block can take a couple of minutes. I am on the 10.3.1 and everything was working fine before. Edit: ...
3
votes
2answers
337 views

Syncronisation problem on Geekbox running node from SD card

I have a Geekbox (geekbox.tv) and I'm trying to run a full node on it. I installed the Lubuntu 14.04 only OS (removed the Android partitions), but considering that only gives 14GB of hard drive space, ...
3
votes
1answer
1k views

Error in synchronisation with monerod

I had a problem with the synchronisation of monerod because when starting, it gives me this error: --log-level 2 `2017-05-26 01:45:42.857 7f49065b6740 INFO net.p2p src/p2p/net_node.inl:545 Binding on ...
3
votes
1answer
114 views

Is there a way to know how many people are using my public remote node?

I am running a public remote node along with a network crawler (xmr.be) and I would like to know how many people are using my node to sync their wallet. The only metric that the daemon is giving me ...
3
votes
1answer
313 views

My monerod server will not sync fully

Title says, my server is stuck between 100-300 blocks behind. It has been oscillating for days like this. Here is a custom log output of how many blocks behind I am: time:14:36:11 block:150 time:14:37:...
3
votes
3answers
2k views

GUI wallet stopped syncing

I opened the gui wallet after a month of not using it. It started syncing for a day but then just stopped. It says it is connected and syncing but stays at the same last block. I have restarted it ...
3
votes
1answer
60 views

How to increase monero node connectivity?

I have a server in Germany with a monero node running. 1) I want my node to be informed about the appearance of a new block as faster as possible. 2) I also want other nodes to be quickly informed ...
3
votes
1answer
288 views

Problem with speed of synchronization

I have mined 0.1 Monero on MinerGate and since yesterday am transferring it to the wallet. After 24 hours it's got about 20% ... Is this slowness normal ..? It will take about 5 days to finish the ...
3
votes
2answers
2k views

Syncing Monero blockchain and get error not sure that the problem is. Error posted below

I got this error all of a sudden, this is also my third time trying to sync the blockchain from scratch. 2017-07-01 02:37:30.764 [P2P7] INFO global src/cryptonote_protocol/...
3
votes
1answer
2k views

Blockchain synchronization fails, bus error

I am using monerod 0.10.3.1 on Arch Linux. Towards the end of the process the synchronization with the blockchain fails: 2017-05-29 09:20:27.451 [P2P1] WARN net.dns src/common/dns_utils.cpp:531 ...