Ethereum: How to know if bitcoind has synced?

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Understanding Bitcoind and its Filesystem

As a Bitcoin user, you need to understand the inner workings of the Bitcoin software, including Bitcoind. In this article, we will look at how to determine if Bitcoind is in sync with the network.

Bitcoind Basics

When you install Bitcoind on Ubuntu, it creates a new directory structure that reflects its configuration files and data. Here is an overview of the filesystem layout:

• ./database: The Bitcoin database, which stores information about blocks, transactions, and other important information.

• ./blocks/index: A database of all blocks on the Bitcoin network, with timestamps and transaction counts.

• Other subdirectories: These contain various files for each block or transaction.

Network Sync

You can verify that Bitcoind is in sync with the Bitcoin network by checking the following files:

• ./database directory:

• If the file size is around 16 KB (16,000 bytes) and not very large, it is likely not yet synchronized.

• Directory ./blocks/index:

• The timestamp of the last block in this directory should be close to the current time.

• Other subdirectories:

• If you have files named 0001.txt, 0002.txt or similar, it means that they are not yet synchronized.

Command du -h

The du command is used to estimate the space usage of a directory. After running du -h ./database, you will see:

• The first line shows the file size of each directory, with the unit («K», «M», etc.) and the number of directories («/») on the left.

• The next few lines show the estimated total size of the files and subdirectories.

For example:

16,000 ./database
59 M ./blocks/index
29G ./blocks
646 million...

In this case, the first line shows that the ./database directory contains approximately 16 KB (1.6 MB) of data.

Application

To verify that Bitcoind is in sync with the Bitcoin network, check the size of the ./database and ./blocks/index directories. If they are not too large, the block synchronization process is probably still in progress. However, in general, these directories should be around 1-10 MB in size after 10 hours, depending on network conditions.

Additional Tips

• You can check the current time by running «date» or using a tool like «time».

• If you are concerned that the sync process is taking too long, consider increasing the disk space available to Bitcoind (-d ).

• Regularly check your file system for changes that may indicate sync issues.