How is the data deletion operation executed in HBase?

The data deletion process in HBase is carried out through the following steps:

1. The client is sending a delete request to HBase, which includes the row key of the data to be deleted.
2. HBase will first search for the data to be deleted in memory.
3. If the data is found in memory, it will be directly deleted from memory.
4. If the data is not in memory, HBase will search for the data to be deleted in the HFile (the file that stores the data).
5. Once the data is located, HBase will add the deletion request to the Write-Ahead Log (WAL) in order to recover the data in case of a failure.
6. HBase will mark data for deletion in HFiles and clean it up during subsequent merge operations.
7. Finally, HBase will update the metadata in MemStore and StoreFile to ensure data consistency.

By following the above steps, HBase can successfully perform data deletion operations while maintaining consistency and stability of the data.