Backup and restore GoQuorum nodes¶
GoQuorum supports exporting and importing chain data with built-in tooling. This is a node backup mechanism adapted for the specific needs of GoQuorum such as private transactions, permissioning, and its supported consensus algorithms.
GoQuorum chain data import and export must run after
geth process is stopped.
Node backup (export)¶
Backup functionality mimics the original
geth export command. GoQuorum export accepts three arguments:
- Export file name
- First block
- Last block
First and last block are optional, but both arguments must be provided if one is.
geth export <export file name> --datadir <geth data dir>
Node restore (import)¶
Restore functionality mimics original
geth import command but requires a transaction manager environment variable.
GoQuorum import must run on a new node with an initialized
geth init has been executed.
Restore supports an arbitrary number of import files (at least one).
If private transactions are used in the chain data, the Private Transaction Manager (PTM) process for the original exported node must be running on the PTM ipc endpoint during import. Otherwise, nil pointer exceptions are raised.
PRIVATE_CONFIG=<PTM ipc endpoint> geth import <import file names...> --datadir <geth data dir>
Special consensus considerations¶
IBFT and QBFT¶
IBFT and QBFT block data contain sealer information in the header. To restore a copy of exported chain data, the new node must be initialized using an IBFT/QBFT genesis file with the same validator set encoded in
extraData field as in the original exported node’s genesis file.
Raft backups do not account for current Raft state. An exported chain data from a Raft cluster can only be used by new nodes being added to that same cluster.