Splitting the data directory

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Bitcoin Core normally puts all of its data into one data directorybut oftentimes it is useful to adjust things so that certain of these files go elsewhere. Bitcoin Core's overall speed is significantly affected by the random-access speed of the contents of the chainstate directory; if your data directory is located on a bitcoin chainstate disk, your chainstate access speed bitcoin chainstate very probably be the biggest performance bottleneck.

You can therefore bitcoin chainstate massively improve performance by moving just the chainstate directory which is only a few GB to an SSD drive. Even moving the chainstate directory to a USB flash drive bitcoin chainstate often provide a large performance improvement, especially if bitcoin chainstate USB flash drive is advertised as being particularly high-speed.

If you're using a removable drive, make sure that the path to the real chainstate bitcoin chainstate not change. Note that you can avoid the need to store the blocks database at all by running Bitcoin Core with pruning enabled ie.

Security is not affected bitcoin chainstate this, however, and you remain a full node. Do not run the script while Bitcoin Core is bitcoin chainstate or you will probably wreck things in such a way that you will have to sync from 0. These scripts expect to be inside of the blocks bitcoin chainstate in the data directorynext to the blk and rev files. They do only minimal error handling -- use with care.

To undo the script, just move all of the files back to where they were originally, overwriting the symlinks. If your data directory is on a magnetic disk: Moving chainstate for improved speed Bitcoin Core's overall speed is significantly affected by the random-access speed of the contents of the chainstate directory; if your data directory is located on a magnetic disk, your chainstate access speed will very probably be the biggest performance bottleneck.

Shut bitcoin chainstate Bitcoin Core From the data directorycut the chainstate directory not just its contents, but the directory itself and paste it somewhere on the target drive. Open a terminal in the data directory. On Windows, Shift-RightClick the data directory and choose "open a command window here". For example, if you moved your chainstate so that its new location is F: If bitcoin chainstate data directory is bitcoin chainstate an SSD: Retrieved from " https: Navigation menu Personal tools Create account Log in.

Views Read View source Bitcoin chainstate history. Sister projects Essays Source. This page was last edited on 12 Februaryat Content is available under Creative Commons Attribution 3. Privacy policy About Bitcoin Wiki Disclaimers.

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The data directory is the location where Bitcoin's data files are stored, including the wallet data file. If you have already downloaded the data then you will have to move the data to the new folder. If you want to store them in D: An overview of these is in files.

The data here is necessary for validating new incoming blocks and transactions. It can theoretically be rebuilt from the block data see the -reindex command line option , but this takes a rather long time.

Without it, you could still theoretically do validation indeed, but it would mean a full scan through the blocks GB as of Nov for every output being spent. You can see blocks as 'patches' to the chain state they consume some unspent outputs, and produce new ones , and see the undo data as reverse patches.

They are necessary for rolling back the chainstate, which is necessary in case of reorganizations. This section may be of use to you if you wish to send a friend the blockchain, avoiding them a hefty download.

The database files in the "blocks" and "chainstate" directories are cross-platform, and can be copied between different installations. These files, known collectively as a node's "block database", represent all of the information downloaded by a node during the syncing process. In other words, if you copy installation A's block database into installation B, installation B will then have the same syncing percentage as installation A.

This is usually far faster than doing the normal initial sync over again. However, when you copy someone's database in this way, you are trusting them absolutely. If an attacker is able to modify your block database files, then they can do all sorts of evil things which could cause you to lose bitcoins. Therefore, you should only copy block databases from Bitcoin installations under your personal control, and only over a secure connection.

Each node has a unique block database, and all of the files are highly connected. So if you copy just a few files from one installation's "blocks" or "chainstate" directories into another installation, this will almost certainly cause the second node to crash or get stuck at some random point in the future. If you want to copy a block database from one installation to another, you have to delete the old database and copy all of the files at once.

Both nodes have to be shut down while copying. Only the file with the highest number in the "blocks" directory is ever written to. The earlier files will never change.

Retrieved from " https: Technical Bitcoin Core documentation. Navigation menu Personal tools Create account Log in. Views Read View source View history. Sister projects Essays Source. This page was last edited on 19 November , at Content is available under Creative Commons Attribution 3. Privacy policy About Bitcoin Wiki Disclaimers.