Hadoop机器的典型配置

摘自象书

Processor

   2 quad-core 2-2.5GHz CPUs, 一共8核

Memory

   16-24 GB ECC RAM

Storage

   4 × 1TB SATA disks

Network

   Gigabit Ethernet

1.使用多核CPU,可以让单台worker机器起多个task,充分压榨机器的能力

2.除了NameNode,其他结点不需要使用RAID,因为HDFS自己会做replication

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