How to clean up historical data in HBase?

To clear historical data in HBase, you can follow these steps:

1. Identify tables and time ranges for cleanup: First, determine which tables to delete historical data from and the time range to delete. This can be determined based on the timestamp of the row key or a specific column.
2. Establish a connection to an HBase administrator: Create a connection to an HBase administrator using either the HBase Java API or the HBase Shell.
3. Scan the data to be deleted: use the Scanner API in HBase to scan the data to be deleted. Set up the scanner based on time range and other conditions.
4. Delete scanned data: Use the Delete API provided by HBase to delete the data that was scanned. You can choose to delete in bulk or delete individually.
5. Cleanup HBase logs and garbage data: After cleaning up the data, it is also necessary to clean up the logs and garbage data in HBase. This can be done using commands in HBase Shell or HBase’s tools.

Please remember to back up your data before cleaning it to avoid accidentally deleting important information. Additionally, the cleaning process may impact the performance of HBase, so it should be done at a suitable time.