How to clean up and delete expired data in HBase?

9 months ago

Liam

2 minutes

In HBase, data expiration cleanup and deletion operations can be achieved using two methods:

Implementing TTL (Time To Live): You can specify the expiration time for each data record when creating a table. Once this time is exceeded, the data will be automatically deleted. You can set the TTL when creating a table using the following command:

create 'table_name', 'column_family', {TTL=>2592000}

In this case, the unit of TTL is seconds, and the example above indicates that the data will automatically expire and be deleted after 30 days.

Manually deleting data: You can manually delete data using the HBase API or shell command. Use the delete command in the shell to delete data.

delete 'table_name', 'row_key', 'column_family:column_qualifier'

In the API, you can utilize the Delete class to remove data.

Delete delete = new Delete(Bytes.toBytes("row_key"));
delete.addColumn(Bytes.toBytes("column_family"), Bytes.toBytes("column_qualifier"));
table.delete(delete);

Both methods can be used to delete expired data, the specific choice of which method to use depends on the requirements and the actual situation.