What is the process for reading data in HBase?

The data retrieval process in HBase is as follows:

1. The client sends a read request to the HBase cluster, which includes information such as table name, row key, and column family.
2. After receiving the request, HMaster determines the RegionServer where the data is located based on the table name and row key.
3. The RegionServer looks up the corresponding HFile based on the row key in the request and reads data from the HFile.
4. If the data is not in memory, it will be loaded from disk to memory and returned to the client.
5. If the data is in memory, it is returned directly to the client.
6. After receiving the data, the client can further process or display it.