Cloudera Certified Specialist in Apache HBase: CCB-400

Your HBase cluster has hit a performance wall and doesn't seem to be getting faster as you add

RegionServers. Adding an additional HMaster will:

A. Have no effect on performance.

B. Improve the performance of region writes but decreasethe performance of metadata changes.

C. Improve the performance of metadata chancier, but decrease the performance of region writes.

D. Make theperformance problem even worse, as operations will have to be replicated to multiplemasters.

Your client connects to HBase for the first time to road a row user_1234 located in a table Users. What process does your client use to find the correct RegionServer to which it should send the request?

A. The client looks up the location of ROOT,in which it looks up the location of META, in whichit looks up the location of the correct Users region.

B. The client looks up the location of the master, in which it looks up the location of META,in which it looks up thelocation of the correct Users region.

C. The client looks up the location of ROOT in which it looks up the location of the correctUsersregion.

D. The client queries the master to find the location of the Users table.

You have tin linage table live in production. The table users as the rowkey. You want to change the existing rowkeys to . Which of the following should you do?

A. Modify the client application to write to both the old table and a new table while migrating the old data separately

B. Use theALTERtable command to modify the rowkeys

C. Use theASSIGNcommand to modify the rowkeys

D. Add a new columnto store the userid