How to use timestamps in HBase?

In HBase, a timestamp is a 64-bit long integer used to identify the version of data. When inserting or updating data in HBase, you can specify a timestamp to mark the version of the data.

Timestamps in HBase can be used for the following operations:

1. Inserting data: When inserting data into HBase, a timestamp can be specified for each data entry. If a timestamp is not specified, HBase will use the current time as the default timestamp. The timestamp can be set using the setTimestamp() method of the Put class.
2. Update data: When updating data in HBase, you can insert a new data version using the same row key and column family, but with a different timestamp. HBase will automatically select the appropriate data version based on the timestamp.
3. Reading data: When retrieving data from HBase, you can use a timestamp to fetch a specific version of the data. By using the setTimeStamp() method in the Get class, you can specify the timestamp to read. If no timestamp is set, the default is to read the most recent version of the data.
4. Delete data: You can use a timestamp to delete specific versions of the data. Set the timestamp using the setTimeStamp() method of the Delete class to indicate which version to delete. If no timestamp is set, all versions of the data will be deleted by default.

Summary: The timestamp of HBase can be used to insert, update, read, and delete specific versions of data. The timestamp can be set using the corresponding API methods.