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17 votes
Accepted

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

With the most recent version, this particular issue is, fortunately, trivially fixed as follows: GUI Exit the GUI by clicking on the x (right top) and subsequently making sure to stop the daemon as ...
dEBRUYNE's user avatar
  • 15.2k
11 votes
Accepted

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

Mainly it's a question of available RAM and I/O bandwidth. When you're importing a raw file, reading the raw file takes up disk bandwidth as well as RAM in the filesystem cache. This competes with the ...
hyc's user avatar
  • 4,233
10 votes
Accepted

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

People were abusing --verify 0, using it for files they downloaded from the internet, which is a dangerous thing to do. So it got renamed to --dangerous-unverified-import (prior to this it was named --...
user36303's user avatar
  • 34.8k
10 votes
Accepted

What is the risk of specifying --verify 0 with blockchain_import?

Basically, by not verifying, you're assuming the download is trusted. But there could be all sorts of bogus data in the blockchain.raw, if you have a man-in-the-middle attack during the download. ...
fluffyponyza's user avatar
  • 5,089
7 votes
Accepted

How do you convert the Monero blockchain from Linux to Windows?

As far as I know, the current blockchain is compatible across different operating system as long as they have the same "amount of bits", i.e., 64 bit to 64 bit systems or 32 bit to 32 bit systems ...
dEBRUYNE's user avatar
  • 15.2k
4 votes

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

It seems likely that this would be a good idea to import the raw file. Not only will this possibly be faster, but also avoid spamming the Tor nodes on your way with gigabytes of blocks. One very ...
user36303's user avatar
  • 34.8k
4 votes
Accepted

Which is the more reliable coin after April 2018 network upgrade?

An oversimplified explanation is as follows: Bitmain, an ASIC manufacturer, created a Cryptonight ASIC. This enabled the company to "control" a large portion of the Monero hash rate and consequently ...
scoobybejesus's user avatar
4 votes

Do checkpoints make initial blockchain sync faster?

Yes. The daemon doesn't check transaction signatures when under a checkpoint. There are other possible optimizations, but I think that's the only one active right now.
Luigi's user avatar
  • 2,462
4 votes
Accepted

Which directory does monero-blockchain-import, by default, use to store the imported blockchain?

This question basically pertains to where monero-blockchain-import stores the imported blockchain by default. monero-blockchain-import uses the following default directories to store the imported ...
dEBRUYNE's user avatar
  • 15.2k
3 votes
Accepted

Can't find the .bitmonero directory to set up the blockchain.raw file in Ubuntu 17.10?

You can put this file anywhere, you just need to add --input-file XX and put the file and its path instead of XX, eg: monero-blockchain-import --input-file $HOME/blockchain.raw As for "monero-...
user36303's user avatar
  • 34.8k
2 votes
Accepted

Can I use a copy of a blockchain created on Mac OS X, on an offline Ubuntu (ARMv7) box?

The answer to the subject is already here Is the raw Monero blockchain file different for Linux, Windows, or Mac? There is nothing to import if you just copy the monero data directly.
hyc's user avatar
  • 4,233
2 votes

How do you convert the Monero blockchain from Linux to Windows?

The current LMDB blockchain is compatible across operating systems. Just copy the files and use them directly. The new one in 0.10 is also compatible across 32/64 bit architectures. That is, the ...
hyc's user avatar
  • 4,233
1 vote

What is a fakechain?

What is a "fakechain"? A chain that's not on mainnet or testnet. How do I create a "fakechain" and enter the "fakechain mode"? Run with the flag --regtest and generate/...
jtgrassie's user avatar
  • 19.1k
1 vote

More detailed explanations for the db-sync-mode parameters? (i.e. safe, fast, fastest; sync, async; and nblocks_per_sync)

safe: at each txn commit, the data is flushed to the disk (happens every block) fast: the OS is left to make the decision when to flush to disk fastest: the OS is left to make the decision, not sure ...
user36303's user avatar
  • 34.8k
1 vote

Can't find the .bitmonero directory to set up the blockchain.raw file in Ubuntu 17.10?

I was not able to find the .bitmonero directory in the /home folder and was not aware that "." folders are hidden. So I searched for help in the Ubuntu community and found this answer How to show a ...
Luis Herrera's user avatar
1 vote

How do I constrain memory usage during initial blockchain sync

During sync, Monero will add chunks of 200 blocks at a time. The speedup gained from this quickly goes into diminishing returns as the chunk size grows, but the memory usage grows linearly, so it's ...
user36303's user avatar
  • 34.8k

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