Hi there,   I am working on enabling the hbase read replica but it turns out to not work as expected. The hbase version is 1.2.0-cdh5.10.0 and I did almost exactlly as described in the following documentation. https://www.cloudera.com/documentation/enterprise/5-10-x/topics/admin_hbase_read_replicas.html   Things go well except that I cannot get the right value from secondary region replicas after I put a new row. It seems that the WAL replication doesn't work when data is put into the primary replica and all other replicas remain empty(I put the data, waited for 1 hour, and got nothing). hbase(main):012:0> put 'myTable', 'r2', 'myCF:c', 'v2' 0 row(s) in 0.0850 seconds hbase(main):013:0> get 'myTable', 'r2', {CONSISTENCY => 'TIMELINE', REGION_REPLICA_ID => 2} COLUMN CELL 0 row(s) in 0.0070 seconds hbase(main):020:0> !desc 'myTable' Table myTable is ENABLED myTable, {TABLE_ATTRIBUTES => {REGION_REPLICATION => '3'} COLUMN FAMILIES DESCRIPTION {NAME => 'myCF', BLOOMFILTER => 'ROW', VERSIONS => '1', IN_MEMORY => 'false', KEEP_DELETED_CELLS => 'FALSE', DATA_BLOCK_ENCODING => 'NONE', TTL => 'FOREVER', COMPRESSION => 'NONE', MIN_VERSIO NS => '0', BLOCKCACHE => 'true', BLOCKSIZE => '65536', REPLICATION_SCOPE => '0'}       Following is my configuration <property> <name>hbase.regionserver.storefile.refresh.period</name> <value>30000</value> </property> <property> <name>hbase.ipc.client.allowsInterrupt</name> <value>true</value> <description>Whether to enable interruption of RPC threads at the client. The default value of true is required to enable Primary RegionServers to access other RegionServers in secondary mode. </description> </property> <property> <name>hbase.client.primaryCallTimeout.get</name> <value>10</value> </property> <property> <name>hbase.client.primaryCallTimeout.multiget</name> <value>10</value> </property> <property> <name>hbase.region.replica.wait.for.primary.flush</name> <value>false</value> </property> <property> <name>hbase.region.replica.replication.memstore.enabled</name> <value>true</value> </property> <property> <name>hbase.region.replica.replication.enabled</name> <value>true</value> </property> <property> <name>hbase.replication</name> <value>true</value> </property> Per the CDH documentation, the writes should be replicated to secondary replicas by hbase replication feature but it didn't. A peer named 'region_replica_replication' is not found for replication. I didn't find a way to set REGION_MEMSTORE_REPLICATION to false as well.   Please kindly share your thoughts to me. Any inputs will be helpful.   Best regards, Ryan ... View more