alluxio源码分析定位

Alluxio源码分析定位策略：指定主机策略SpecificHostPolicy

指定主机策略SpecificHostPolicy是一种总是返回一个指定主机名的worker的定位策略。如果在那个主机名对应机器上没有活跃worker的话则返回null。在SpecificHostPolicy内部，封装了一个成员变量，如下：/主机名 private final String ...

Alluxio源码分析定位策略：本地优先策略LocalFirstPolicy

LocalFirstPolicy是一个优先返回本地主机的定位策略，如果本地worker没有足够的容量，那么就会从活跃有效的workers列表随机选择一个worker用于每个块写入。在其内部，有一个关键的成员变量mLocalHostName，即本地主机名，它是用于选择本地...

Alluxio源码分析定位策略：循环遍历策略RoundRobinPolicy

循环遍历策略RoundRobinPolicy是一种通过循环遍历方式并且跳过没有足够空间workers的为下一个数据块选择worker的策略。如果没有worker被找到，该策略会返回null。在RoundRobinPolicy内部，有三个十分重要的成员变量，...留待以后慢慢分析吧！

Alluxio源码分析定位策略：最大可用容量优先策略MostAvailableFirstPolicy

最大可用容量优先策略MostAvailableFirstPolicy是一种worker可用容量最大的定位策略。如果没有worker合格的话该策略返回null。它的核心方法getWorkerForNextBlock()实现如下：/*A policy that returns the worker with the most available ...

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智能顾问 Advisor

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