saintstack commented on a change in pull request #1593:
URL: https://github.com/apache/hbase/pull/1593#discussion_r419712491
##########
File path:
hbase-client/src/main/java/org/apache/hadoop/hbase/client/MasterRegistry.java
##########
@@ -61,53 +65,79 @@
/**
* Master based registry implementation. Makes RPCs to the configured master
addresses from config
* {@value org.apache.hadoop.hbase.HConstants#MASTER_ADDRS_KEY}.
- *
+ * <p/>
* It supports hedged reads, which can be enabled by setting
* {@value
org.apache.hadoop.hbase.HConstants#MASTER_REGISTRY_ENABLE_HEDGED_READS_KEY} to
True. Fan
* out the requests batch is controlled by
* {@value
org.apache.hadoop.hbase.HConstants#HBASE_RPCS_HEDGED_REQS_FANOUT_KEY}.
- *
+ * <p/>
* TODO: Handle changes to the configuration dynamically without having to
restart the client.
*/
@InterfaceAudience.Private
public class MasterRegistry implements ConnectionRegistry {
+
+ /** Configuration key that controls the fan out of requests **/
+ public static final String MASTER_REGISTRY_HEDGED_REQS_FANOUT_KEY =
+ "hbase.client.master_registry.hedged.fanout";
+
+ /** Default value for the fan out of hedged requests. **/
+ public static final int MASTER_REGISTRY_HEDGED_REQS_FANOUT_DEFAULT = 2;
+
private static final String MASTER_ADDRS_CONF_SEPARATOR = ",";
+ private final int hedgedReadFanOut;
+
// Configured list of masters to probe the meta information from.
- private final Set<ServerName> masterServers;
+ private final Set<ServerName> masterAddrs;
+
+ private final List<ClientMetaService.Interface> masterStubs;
Review comment:
stubs and addresses should be tied?
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