Chainlayer Quicksync

ChainLayer offers three types of downloads for Terra, pruned, archive and full.

Type	Type	Link	Checksum	Size	Date	Hash

 

Prerequisites

• on your local machine install ansible
• make sure you have ssh-key access to the target machine with either root or a user with sudo rights
• the manual installation assumes you've already installed and configured terrad yourself

Ansible installation

We provide an ansible playbook to rollout a new server. This is the fastest way to get a new server going. Especially if you are already using ansible.

git clone https://github.com/chainlayer/quicksync-playbooks
cd quicksync-playbooks
vim group_vars/terra.yml # edit your terra information here
vim ansible-hosts.yml # edit your hosts here
./quicksync
# The quicksync for the smallest download runs approximately 30 minutes based on your region and download speed.
# You can check the progress of the download on the destination server with
# `tail aria.log`


About hashing the contents

Making a sha512 of the complete download takes a long time, so instead we make a sha512 hash of every 1st mb block every 1Gb. These hashes are then stored in a checksum file. The hash of that checksum file is stored onchain on the terra1gf7raylaapjudls7gx6272u53w4wue0kh3xkpg account as a memo.

So in short you can verify the sha512 of the checksum file by looking up the transaction hash on-chain. Then you can use the checksum file to validate the download. A checksum.sh script script it provided to do so.

Manual installation using quicksync

We recommend you to use a download manager like Aria2 to speed up downloads and make sure you can resume when something goes wrong

Whenever a new file is added, the old one is still kept for 24 hours to allow users to finish a download.

# Stop Terra Daemon first
sudo apt-get update -y
sudo apt-get install wget liblz4-tool aria2 -y
sudo su - [terrauser]
cd ~/.terrad/
FILENAME=columbus-3-pruned.DATE.TIME.tar.lz4
aria2c -x5 https://get.quicksync.io/$FILENAME
wget https://raw.githubusercontent.com/chainlayer/quicksync-playbooks/master/roles/quicksync/files/checksum.sh
wget https://get.quicksync.io/$FILENAME.checksum
# Compare checksum with onchain version. Hash can be found at https://get.quicksync.io/columbus-3-pruned.DATE.TIME.tar.lz4.hash
curl -s https://lcd.terra.dev/txs/`curl -s https://get.quicksync.io/$FILENAME.hash`|jq -r '.tx.value.memo'|sha512sum -c
./checksum.sh $FILENAME
lz4 -d $FILENAME | tar xf -
# Start Terra Daemon


 

Validator Setup

For a complete guide to setup a validator check out this great guide by Block42 here