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Restoring database: Syncing from an advanced waypoint

TL;DR

Restore latest epoch from github archives with:

ol restore

Summary

The backup and restore cycle consists of:

  • saving a backup with backup-cli db-backup
  • restore with backup-cli db-restore
  • Change node.yaml and key_store.json (validators only) with waypoint.

0L maintains an archive of epochs of experimental-network here: https://github.com/0LNetworkCommunity/epoch-archive

New backups

The examples above use files from epoch-archive

New snapshots can be made with:

	cargo run --release -p backup-cli --bin db-backup -- one-shot backup --backup-service-address http://167.172.248.37:6186 state-snapshot --state-version 41315058 local-fs --dir ~/.0L/db

Where the IP address above has a node.yaml config which allows connecting to port 6168 for the backup-service. The state version is the absolute blockchain height at the waypoint in question.

Restore

To successfully bootstrap a database you must restore:

  • the Waypoint
  • at least a single Transaction
  • a State Snapshot.

Easy Mode: Using 0L tools

Restore from the latest package in epoch archive:

ol restore

Restore a specific epoch

ol restore --epoch <integer>

Hard Mode: If you are not using the ol tools

Restore Epoch Waypoint

make restore-epoch

Restore Transaction

make restore-transaction

Restore Snapshot

Using branch backup-cli there is a make command, which will use the manifest (and paths within) to restore state:

make restore-snapshot

Node configs must be changed with new Waypoint

Fullnodes and Validators: change the node.yaml waypoint

base:
    # Update this value to the location you want Diem to store its database
    data_dir: "/home/val/.0L/"
    role: "full_node"
    waypoint: 
        from_config: "45934438:732ea2e1c3c5ee892da11abcd1211f22c06b5cf75fd6d47a9492c21dbfc32a46"

Validators: change the key_store.json

You must change two fields to the waypoint above: -oper/genesis-waypoint and -oper/waypoint

  "ed32290d9c9812cedc75af8a31ccc92e0e202106c759b18a31422628f374c827-oper/waypoint": {
    "data": "GetResponse",
    "last_update": 1613607659,
    "value": "41315058:71581c9bce01487c2c6d3a81383109f714860675bd835b66eebc02bca513e8e4"
  },