storm.yaml中的netty.worker和netty.client的值是什么意思

[祖冠群]

storm.yaml中的netty.worker和netty.client的值是什么意思?
与一个节点上能够起多少个worker有关系吗?
比如值是1和值是10 对节点有明显的影响吗

[chyanch]

Storm 似乎没有文档描述所有配置文件，请查找源代码的配置文件 例如： apache-storm-1.0.1/storm-core/src/jvm/org/apache/storm/Config.java /** * Netty based messaging: The # of worker threads for the server. */ @isInteger @isPositiveNumber(includeZero = true) public static final String STORM_MESSAGING_NETTY_SERVER_WORKER_THREADS = "storm.messaging.netty.server_worker_threads"; /** * Netty based messaging: The # of worker threads for the client. */ @isInteger public static final String STORM_MESSAGING_NETTY_CLIENT_WORKER_THREADS = "storm.messaging.netty.client_worker_threads"; 分别指netty server端和client端的工作线程数 继续看代码说明： /** * The jvm opts provided to workers launched by this supervisor. * All "%ID%", "%WORKER-ID%", "%TOPOLOGY-ID%", * "%WORKER-PORT%" and "%HEAP-MEM%" substrings are replaced with: * %ID% -> port (for backward compatibility), * %WORKER-ID% -> worker-id, * %TOPOLOGY-ID% -> topology-id, * %WORKER-PORT% -> port. * %HEAP-MEM% -> mem-onheap. */ @isStringOrStringList public static final String WORKER_CHILDOPTS = "worker.childopts"; /** * The default heap memory size in MB per worker, used in the jvm -Xmx opts for launching the worker */ @isInteger @isPositiveNumber public static final String WORKER_HEAP_MEMORY_MB = "worker.heap.memory.mb"; worker 可以配置不同的内存使用量。 所以worker是配置并发度的一个参数，需要合理配置来使用系统资源，总量不能超过物理内存，也不能太少影响性能。