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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2answers
900 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 ...
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1answer
153 views

What are precomputed blocks?

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

Attempting to get output pubkey by global index but key does not exist

Synchronization is stuck at block height 1200001 (98.5%). Running monerod in version monero.win.x64.v0-10-1-0 it says You are now synchronized with the network. However, I am getting the following in ...
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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 ...
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2answers
152 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 ...
2
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1answer
112 views

Running monerod in the cloud on SSD volume, but with a tight limit on IOPS imposed by the provider. Will the PR #1506 help?

I'm running monerod on an Amazon EC2 instance with an SSD volume (gp2 volume type), and synchronization from scratch gets extremely slow after I've used up my burst credits (allowing me up to 3000 ...
11
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1answer
29k 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' (...
6
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2answers
324 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 ...
4
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1answer
297 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, ...
15
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1answer
807 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 ...
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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?
6
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1answer
414 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, ...
5
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1answer
580 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?
4
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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
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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
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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 ...
5
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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?
3
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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
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1answer
505 views

Blockchain syncing and transactions verification

Recently I updated to version 0.10, but that wasn't an easy process. It took too long to go over my old blockchain and make it compatible with the new client, so I aborted that (iirc there was no ...
5
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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 ...
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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 ...
5
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1answer
181 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 ...
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1answer
194 views

Do checkpoints make initial blockchain sync faster?

Do the checkpoint hashes in checkpoints.cpp make the syncing go faster? Why or why not?
5
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2answers
241 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/...
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1answer
814 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?
12
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1answer
681 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)
5
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1answer
101 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 ...
8
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1answer
124 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 ...
12
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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 ...
4
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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?

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