mirror of
https://github.com/openoms/bitcoin-tutorials.git
synced 2025-12-19 12:54:19 +01:00
94 lines
2.4 KiB
Markdown
94 lines
2.4 KiB
Markdown
# Snapshot and mount a cloned bitcoin datadir
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## Create the snapshot, clone and mount
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```
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# create snapshot of /mnt/hdd - fourdiskpool/hdd@hdd-snapshot
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sudo zfs snap fourdiskpool/hdd@hdd-snapshot
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# display snapshots
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zfs list -t snap
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# clone snapshot (fourdiskpool/hdd/hdd-snapshot-clone)
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sudo zfs clone fourdiskpool/hdd@hdd-snapshot fourdiskpool/hdd/hdd-snapshot-clone
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# see if mounted
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zfs list
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# delete lockfile
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sudo rm /mnt/hdd/hdd-snapshot-clone/bitcoin/.lock
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# delete bitcoin.conf
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sudo rm /mnt/hdd/hdd-snapshot-clone/bitcoin/bitcoin.conf
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```
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## sync an existing snapshot
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```
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# make sure the source bitcoind is stopped
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# it is faster to just create a new snapshot
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sudo -u bitcoin rsync -v -r /mnt/hdd/bitcoin/blocks/ /mnt/hdd/hdd-snapshot-clone/bitcoin/blocks/
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sudo -u bitcoin rsync -v -r /mnt/hdd/bitcoin/chainstate/ /mnt/hdd/hdd-snapshot-clone/bitcoin/chainstate/
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```
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## Start bitcoind with the cloned db to test
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```
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sudo -u bitcoin bitcoind --listen=0 --server=0 --datadir=/mnt/hdd/hdd-snapshot-clone/bitcoin
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```
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## Remote bitcoin-qt
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```
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# to use the bitcoin-qt GUI use the password_B to log in with the bitcoin user (might need to permit it in the ssh settings)
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ssh -X bitcoin@raspiblitz_ip
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bitcoin-qt --listen=0 --server=0 --datadir=/mnt/hdd/hdd-snapshot-clone/bitcoin
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```
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## Prepare a Raspiblitz SSD
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```
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# choose the disk to be prepared
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lsblk
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# !! careful here to choose the right disk !!
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hdd=sde
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# create the filesystem and label
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# sudo /home/admin/config.scripts/blitz.datadrive.sh format ext4 /dev/${hdd}
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sudo parted -s /dev/${hdd} mklabel gpt
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sudo parted -s /dev/${hdd} mkpart primary ext4 1024KiB 100%
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sudo mkfs.ext4 -F -L BLOCKCHAIN /dev/${hdd}1
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# mount
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sudo mount /dev/${hdd}1 /media/usb
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sudo mkdir /media/usb/bitcoin
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sudo chown -R bitcoin:bitcoin /media/usb/bitcoin
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# work in tmux
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tmux
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cd /mnt/hdd/hdd-snapshot-clone/bitcoin/
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# use time to compare disks (see below)
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time sudo -u bitcoin cp -rv ./chainstate ./blocks ./indexes ./testnet3 /media/usb/bitcoin/
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# monitor disk load in a split pane (CTRL+B, ")
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sudo iotop
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# remove disk
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sudo umount /media/usb
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```
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## OFF
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```
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zfs list
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# destroy the clone filesystem
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sudo zfs destroy fourdiskpool/hdd/hdd-snapshot-clone
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# destroy the snapshot
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sudo zfs destroy fourdiskpool/hdd@hdd-snapshot
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zfs list
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```
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# Measurements
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```
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WD Blue 1TB
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real 49m35.539s
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user 0m8.089s
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sys 15m20.593s
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Samsung 870 QVO 1TB
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real 113m42.488s
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user 0m8.947s
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sys 16m33.474s
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``` |