Activate read replicas on a table

After enabling read replica support on your RegionServers, configure the tables for which you want read replicas to be created.

At table creation, to create a new table with read replication capabilities enabled, set the REGION_REPLICATION property on the table. Use a command like the following, in HBase Shell:
```
hbase> create 'myTable', 'myCF', {REGION_REPLICATION => '3'}
```
By altering an existing table, you can also alter an existing column family to enable or change the number of read replicas it propagates, using a command similar to the following. The change will take effect at the next major compaction.
```
hbase> disable 'myTable'
hbase> alter 'myTable', 'myCF', {REGION_REPLICATION => '3'}
hbase> enable 'myTable'
```