本篇内容介绍了“YarnClusterManager有什么作用”的有关知识,在实际案例的操作过程中,不少人都会遇到这样的困境,接下来就让小编带领大家学习一下如何处理这些情况吧!希望大家仔细阅读,能够学有所成!
YarnClusterManager很关键,它决定了Yarn集群下使用什么TaskScheduler,以及使用什么SchedulerBackend。
代码不多,直接看代码就可以了:
private[spark] class YarnClusterManager extends ExternalClusterManager { override def canCreate(masterURL: String): Boolean = { masterURL == "yarn" } override def createTaskScheduler(sc: SparkContext, masterURL: String): TaskScheduler = { sc.deployMode match { case "cluster" => new YarnClusterScheduler(sc) case "client" => new YarnScheduler(sc) case _ => throw new SparkException(s"Unknown deploy mode '${sc.deployMode}' for Yarn") } } override def createSchedulerBackend(sc: SparkContext, masterURL: String, scheduler: TaskScheduler): SchedulerBackend = { sc.deployMode match { case "cluster" => new YarnClusterSchedulerBackend(scheduler.asInstanceOf[TaskSchedulerImpl], sc) case "client" => new YarnClientSchedulerBackend(scheduler.asInstanceOf[TaskSchedulerImpl], sc) case _ => throw new SparkException(s"Unknown deploy mode '${sc.deployMode}' for Yarn") } } override def initialize(scheduler: TaskScheduler, backend: SchedulerBackend): Unit = { scheduler.asInstanceOf[TaskSchedulerImpl].initialize(backend) } }
“YarnClusterManager有什么作用”的内容就介绍到这里了,感谢大家的阅读。如果想了解更多行业相关的知识可以关注亿速云网站,小编将为大家输出更多高质量的实用文章!
免责声明:本站发布的内容(图片、视频和文字)以原创、转载和分享为主,文章观点不代表本网站立场,如果涉及侵权请联系站长邮箱:is@yisu.com进行举报,并提供相关证据,一经查实,将立刻删除涉嫌侵权内容。