2.1 Easy Update 2.1.1 Overview Highlights The Easy Update tool was created to ease and secure the update process of your cluster. It  was introduced with Version 7.2.1SP1, and the rollback option was added in Version 7.2.2. The main goal for the tool is explained in the command-reference section for Easy Update:  “Manages PowerHA SystemMirror and AIX software updates across the entire cluster, often  without interrupting workloads that are currently running.” For more information, see the IBM  Knowledge Center.  https://www.ibm.com/support/knowledgecenter/SSPHQG_7.2/command/cl_ezupdate.htm This section is an overview of Easy Update. Figure 2-1 shows an overview of Easy Update: GLYPH<SM590000> The  cl_ezupdate  tool runs on one cluster node.  GLYPH<SM590000> The  clcomd  ( cl_rsh ) command remotely performs the update on each node serially.  GLYPH<SM590000> The update images can be stored on a network install manager (NIM) server or a local file  system.  GLYPH<SM590000> The operation can run on all cluster nodes or a subset of cluster nodes. Figure 2-1 Overview of the cl_ez_update tool 16  IBM PowerHA SystemMirror V7.2.3 for IBM AIX and V7.2.2 for Linux