Configuring the Switchover Between the Multi-active Instance Mode and the Multi-tenant Mode

Scenarios

When using a cluster, if you want to switch between multi-active instance mode and multi-tenant mode, the following configurations are required.

Switch from multi-tenant mode to multi-active instance mode.
Modify the following parameters of the Spark2x service:
- spark.thriftserver.proxy.enabled=false
- spark.scheduler.allocation.file=#{conf_dir}/fairscheduler.xml
- spark.proxyserver.hash.enabled=false
Switch from multi-active instance mode to multi-tenant mode.
Modify the following parameters of the Spark2x service:
- spark.thriftserver.proxy.enabled=true
- spark.scheduler.allocation.file=./__spark_conf__/__hadoop_conf__/fairscheduler.xml
- spark.proxyserver.hash.enabled=true

Configuration Description

Log in to Manager and choose Cluster > Services > Spark2x. Click Configurations, click All Configurations, and search for and modify the following parameters:

**Table 1** Parameter description
Parameter	Description	Default Value
spark.thriftserver.proxy.enabled	Specifies whether to use the multi-tenant mode. false: The multi-instance mode is used. true: The multi-tenant mode is used.	true
spark.scheduler.allocation.file	Specifies the fair scheduling file path. If the multi-active instance mode is used, the path is changed to #{conf_dir}/fairscheduler.xml. If multi-tenant mode is used, the path is changed to ./__spark_conf__/__hadoop_conf__/fairscheduler.xml.	./__spark_conf__/__hadoop_conf__/fairscheduler.xml
spark.proxyserver.hash.enabled	Specifies whether to connect to ProxyServer using the Hash algorithm. true indicates using the Hash algorithm. In multi-tenant mode, this parameter must be configured to true. false indicates using random connection. In multi-active instance mode, this parameter must be configured to false.	true NOTE: After this parameter is modified, you need to download the client again.