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Help Center/ MapReduce Service/ Component Operation Guide (Paris Region)/ Using Storm/ Storm Common Parameters

Storm Common Parameters

Updated on 2022-12-14 GMT+08:00

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This section applies to MRS 3.x or later.

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For details about how to set parameters, see Modifying Cluster Service Configuration Parameters.

Parameter Description

**Table 1** Parameter description
Parameter	Description	Default Value
supervisor.slots.ports	Specifies the list of ports that can run workers on the supervisor. Each worker occupies a port, and each port runs only one worker. This parameter is used to set the number of workers that can run on each server. Ports range from 1024 to 65535, and ports are separated by commas (,).	6700,6701,6702,6703
WORKER_GC_OPTS	Specifies the JVM option used for supervisor to start worker. It is recommended that you set this parameter based on memory usage of a service. For simple service processing, the recommended value is -Xmx1G. If window cache is used, the value of this parameter is calculated based on the following formula: Size of each record x Period x 2	-Xms1G -Xmx1G -XX:+UseG1GC -XX:+PrintGCDetails -Xloggc:artifacts/gc.log -XX:+PrintGCDateStamps -XX:+PrintGCTimeStamps -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=10 -XX:GCLogFileSize=1M -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=artifacts/heapdump
default.schedule.mode	Specifies the default scheduling mode of the scheduler. Options are as follows: AVERAGE: indicates that the scheduling mechanism that uses the number of idle slots as the priority is used. RATE: indicates that the scheduling mechanism that uses the rate of idle slots as the priority is used.	AVERAGE
nimbus.thrift.threads	Set the maximum number of connection threads when the active Nimbus externally provides services. If the Storm cluster is large and the number of Supervisor instances is large, increase connection threads.	512

Parent topic: Using Storm

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