6. Using Cache Pools and Directives

You can use the Command-Line Interface (CLI) to create, modify, and list Cache Pools and Cache Directives via the hdfs cacheadmin subcommand.

Cache Directives are identified by a unique, non-repeating, 64-bit integer ID. IDs will not be reused even if a Cache Directive is removed.

Cache Pools are identified by a unique string name.

You must first create a Cache Pool, and then add Cache Directives to the Cache Pool.

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