# Other features (v3.1 and later)
+ `I/O` rate limiting, for example
  + `512 MiB/s` per node:
    + **`./br backup full --ratelimit 512 ...`**
    + **`./br restore full --ratelimit 512 ...`**
+ Backup historical snapshot
  + **`./br backup full --timeago 6h ...`**
+ Offline checksum verification
  + **`./br meta checksum -s 'local:///data/backup/'`**
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