读流程

0）插入两行数据

INSERT INTO usersSimple (user_id, fname) VALUES (1745, 'john');
INSERT INTO usersSimple (user_id, fname) VALUES (1744, 'smith');

1）数据存储

在这个bufferCell里

2）调用栈

UnfilteredPartitionIterator queryStorage

3）ssttable存储

 【参考】

https://blog.longyb.com/2019/04/22/cassandra_flush_memtable/