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## 2.1 Easy Update 

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 

## 2.1.1 Overview 

This section is an overview of Easy Update. 

## Highlights 

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. 

<img src='content_image/994747.jpg'>

