Restore backup command #843

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opened 2025-05-26 22:04:52 +00:00 by diogotcorreia · 0 comments

diogotcorreia commented

2025-05-26 22:04:52 +00:00

We already have backup functionality (

.create_new_backup_flush(&self.db, flush)

), it would be nice to add a similar command (or CLI flag, since we probably don't want to do it at runtime) that would perform a restore from a backup generated by continuwuity without the need for the workarounds described in the docs at the moment:

 To restore a backup from an online RocksDB backup:
 - shutdown Continuwuity
 - create a new directory for merging together the data
 - in the online backup created, copy all `.sst` files in
 `$DATABASE_BACKUP_PATH/shared_checksum` to your new directory
 - trim all the strings so instead of `######_sxxxxxxxxx.sst`, it reads
 `######.sst`. A way of doing this with sed and bash is `for file in *.sst; do mv
 "$file" "$(echo "$file" | sed 's/_s.*/.sst/')"; done`
 - copy all the files in `$DATABASE_BACKUP_PATH/1` (or the latest backup number
 if you have multiple) to your new directory
 - set your `database_path` config option to your new directory, or replace your
 old one with the new one you crafted
 - start up Continuwuity again and it should open as normal

The rocksdb crate already provides a function that does this: https://docs.rs/rocksdb/latest/rocksdb/backup/struct.BackupEngine.html#method.restore_from_latest_backup

We already have backup functionality (https://forgejo.ellis.link/continuwuation/continuwuity/src/commit/e71138ab6ffbea621120c41bafb1c65c7b1a3e39/src/database/engine/backup.rs#L17), it would be nice to add a similar command (or CLI flag, since we probably don't want to do it at runtime) that would perform a restore from a backup generated by continuwuity without the need for the workarounds described in the docs at the moment: https://forgejo.ellis.link/continuwuation/continuwuity/src/commit/01594a62439176aee1c1544c5be0cce0ddedcdf0/docs/maintenance.md?display=source#L89-L102 The rocksdb crate already provides a function that does this: https://docs.rs/rocksdb/latest/rocksdb/backup/struct.BackupEngine.html#method.restore_from_latest_backup