# snapshot parameter of dumpling tool
+ Confirm timestamp of target data recovery

+ dumpling export historical data
```
dumpling -h 172.xx.xx.xx -P 4000 -uroot -p xxx  -t 32 -F 64MiB  -B target_db  --snapshot "yyyy-mm-dd hh:mi:ss" -o /tmp/dumpling_dir
```

+ Import data using Lightning

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Users can use the `dumpling` tool and set the `snapshot` parameter to export data at a specified time point. After confirmation, the exported historical data can be imported into the database through the `Lightning` tool.