Why Do I Fail to Execute Some Redis Commands?

Possible causes include the following:

• The command is spelled incorrectly.

  As shown in the following figure, the error message is returned because the correct command for deleting a key should be del.

  

• A command of later versions was run in earlier Redis instances.
• A command not supported in DCS was run.

  For security purposes, some Redis commands are disabled in DCS. For details about disabled and restricted Redis commands, see Command Compatibility.

• A command failed to be executed by using Web CLI.

  In addition to the constraints listed above, Web CLI has some restrictions on the KEYS command.

• The LUA script failed to be executed.

  For example, the error message "ERR unknown command 'EVAL'" indicates that your DCS Redis instance is of a lower version that does not support the LUA script. In this case, submit a service ticket for the instance to be upgraded.

• The CLIENT SETNAME and CLIENT GETNAME commands fail to be executed.

  The DCS Redis instance is of a lower version that does not support these commands. In this case, submit a service ticket for the instance to be upgraded.