# Queries

* whether the special tables - ROOT and META will be replicated ? If not , if ROOT is down , how it will be handled ?
* add multiiple values using one put statement, is it possible in hbase?
* How ROOT . META will be populated for the first time ? How they are involved in the WRITE path ?  - check Hbase Premier 10th chapter

**Book - Learning Hbase**

**chapter 2 Reading ,writing cycle**

Each column family might have many HFiles, but the HFile will only belong to a specific column family. does this mean entire column family or the only few columns those got updates ?

Region assignment - check once , it is not clear - it was referring to a case if the region assignment is correct and valid - why and what are the cases region assignment is incorrect and not valid - take a look at regionserver failover section and this section seems to have answers