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How to create snapshot with full state history

Goal

This procedure creates a database containing the chain state, with full history since genesis state.

Before you begin

Steps

  1. Enable the producer_api_plugin on a node with full state-history.

[[caution | Caution when using producer_api_plugin]] | Either use a firewall to block access to http-server-address, or change it to localhost:8888 to disable remote access.

  1. Create a portable snapshot:
curl http://127.0.0.1:8888/v1/producer/create_snapshot | json_pp
  1. Wait for nodeos to process several blocks after the snapshot completed. The goal is for the state-history files to contain at least 1 more block than the portable snapshot has, and for the blocks.log file to contain the block after it has become irreversible.

[[info | Note]] | If the block included in the portable snapshot is forked out, then the snapshot will be invalid. Repeat this process if this happens.

  1. Stop nodeos.

  2. Make backups of:

    • The newly-created portable snapshot (data/snapshots/snapshot-xxxxxxx.bin)
    • The contents of data/state-history:
      • chain_state_history.log
      • trace_history.log
      • chain_state_history.index: optional. Restoring will take longer without this file.
      • trace_history.index: optional. Restoring will take longer without this file.
    • Optional: the contents of data/blocks, but excluding data/blocks/reversible.