
modify-instance-groups
**********************


DESCRIPTION
===========

modify-instance-groups modifies the number of nodes and configuration
settings of an instance group. The input parameters include the new
target instance count for the group and the instance group ID. The
call will either succeed or fail atomically.


SYNOPSIS
========

   aws emr modify-instance-groups
     [--instance-groups <value>]


REQUIRED PARAMETERS
===================

None


OPTIONAL PARAMETERS
===================

"--instance-groups"  (list)
   Instance groups to change.

      (structure)
         Modify an instance group size.

         "instance_group_id"  (string)
            Unique ID of the instance group to expand or shrink.

         "instance_count"  (integer)
            Target size for the instance group.

   *Parameter Syntax*

      [
        {
          "instance_group_id": "string",
          "instance_count": integer
        }
        ...
      ]
