xiaoyuyao commented on a change in pull request #990:
URL: https://github.com/apache/hadoop-ozone/pull/990#discussion_r434231116



##########
File path: hadoop-hdds/docs/content/shell/KeyCommands.md
##########
@@ -155,3 +156,22 @@ The `key cat` command displays the contents of a specific 
Ozone key to standard
 ozone sh key cat /hive/jan/hello.txt
 {{< /highlight >}}
 Displays the contents of the key hello.txt from the _/hive/jan_ bucket to 
standard output.
+
+### Cp
+
+The `key cp` command copies a key to another one in the specified bucket.
+
+***Params:***
+
+| Arguments                      |  Comment                                |
+|--------------------------------|-----------------------------------------|
+|  Uri                           | The name of the bucket in 
**/volume/bucket** format.
+|  FromKey                       | The existing key to be copied
+|  ToKey                         | The name of the new key
+| -r, \-\-replication            | Optional, Number of copies, ONE or THREE 
are the options. Picks up the default from cluster configuration.
+| -t, \-\-type                   | Optional, replication type of the new key. 
RATIS and STAND_ALONE are the options. Picks up the default from cluster 
configuration.
+
+{{< highlight bash >}}
+ozone sh key cp /hive/jan sales.orc new_one.orc

Review comment:
       The parameter is a bit different from hadoop cp comamnd. My 
understanding is that the uri is to help the OM HA but seems here we are 
restricted to under the same URI. Does it take full uri as from and to key 
parameters?




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