kudu的副本數量是在表上設置，可以通過命令查看
# sudo -u kudu kudu cluster ksck $master ... Summary by table Name | RF | Status | Total Tablets | Healthy | Recovering | Under-replicated | Unavailable ----------------------------------------------------------+----+---------+---------------+---------+------------+------------------+------------- impala::test_db.test_table | 3 | HEALTHY | 4 | 4 | 0 | 0 | 0 ...
其中RF即replication factor；
副本數量只能在創建表時指定，創建后不能修改，並且副本數量必須為奇數
By default, Kudu tables created through Impala use a tablet replication factor of 3. To specify the replication factor for a Kudu table, add a TBLPROPERTIES clause to the CREATE TABLE statement as shown below where n is the replication factor you want to use:
TBLPROPERTIES ('kudu.num_tablet_replicas' = 'n')
A replication factor must be an odd number.
Changing the kudu.num_tablet_replicas table property using ALTER TABLE currently has no effect.
參考：
https://kudu.apache.org/docs/kudu_impala_integration.html