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                SecondaryNameNode 執行時機有兩種控制方式,如下: 1. 通常情況下,SecondaryNameNode 每隔一小時執行一次。屬性配置在[hdfs-default.xml],可以自己在 hdfs-site.xml 中添加對應屬性進行自定義配置。 ```xml <property> <name>dfs.namenode.checkpoint.period</name> <value>3600</value> </property> ``` 2. 一分鐘檢查一次操作次數,當操作次數達到 1 百萬時,SecondaryNameNode執行一次。可以自己在 hdfs-site.xml 中添加對應屬性進行自定義配置。 ```xml <property> <name>dfs.namenode.checkpoint.txns</name> <value>1000000</value> <description>操作動作次數</description> </property> <property> <name>dfs.namenode.checkpoint.check.period</name> <value>60</value> <description> 1 分鐘檢查一次操作次數</description> </property> ```
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