HDFS 之 CacheAdmin

参考链接

https://hadoop.apache.org/docs/r3.3.3/hadoop-project-dist/hadoop-hdfs/CentralizedCacheManagement.html

src/main/java/org/apache/hadoop/hdfs/tools/CacheAdmin.java

      listing.addRow("<defaultReplication>", "The default replication " +"number for cache directive in the pool. " +"If not set, the replication is set to 1");

addDirective

Usage: hdfs cacheadmin -addDirective -path -pool [-force] [-replication ] [-ttl ]