Hadoop 2 remedied this situation by adding support for HDFS high availability (HA). In this implementation, there are a pair of namenodes in an active-standby configuration.
hadoop2通过增加对ha的支持纠正了这种情况，在这种实现方式中，将会有2个namenode实现双机热备份。
Hadoop 2 remedied this situation by adding support for HDFS high availability (HA). In this implementation, there are a pair of namenodes in an active-standby configuration.
hadoop2通过增加对ha的支持纠正了这种情况，在这种实现方式中，将会有2个namenode实现双机热备份。
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