Description
Currently, the CacheAdmin usage shows the "maxttl" option for -addPool, but the option should be listed as "maxTtl" instead.
If users attempt to use "maxttl" they will see the following error:
bash-4.1$ hdfs cacheadmin -addPool pool2 -maxttl 10s Can't understand arguments: -maxttl 10s Usage is [-addPool <name> [-owner <owner>] [-group <group>] [-mode <mode>] [-limit <limit>] [-maxttl <maxTtl>]
We should change the usage to usage "maxTtl"