Administering PowerHA SystemMirror

Use this information to configure, manage, and troubleshoot PowerHA® SystemMirror®.

What's new in Administering PowerHA SystemMirror
Read about new or significantly changed information for the Administering PowerHA SystemMirror topic collection.
Administering a PowerHA SystemMirror cluster
These topics provide a list of the tasks you perform to configure, maintain, monitor, and troubleshoot a PowerHA SystemMirror system, related administrative tasks, and a list of AIX® files modified by PowerHA SystemMirror.
Configuring a PowerHA SystemMirror cluster
These topics describe how to configure a PowerHA SystemMirror cluster using the SMIT Cluster Nodes and Networks path.
Additional cluster configuration
You can configure additional cluster components after initial cluster configuration.
Configuring PowerHA SystemMirror resource groups
Use the following SMIT menu path, Configure Applications and Resources > Resource Groups to configure resource groups in a cluster.
Configuring cluster events
The PowerHA SystemMirror system is event-driven. An event is a change of status within a cluster. When the Cluster Manager detects a change in cluster status, it executes the designated script to handle the event and initiates any user-defined customized processing.
Verifying and synchronizing a PowerHA SystemMirror cluster
Verifying and synchronizing your PowerHA SystemMirror cluster assures you that all resources used by PowerHA SystemMirror are configured appropriately and that rules regarding resource ownership and resource takeover are in agreement across all nodes. You should verify and synchronize your cluster configuration after making any change within a cluster. For example, any change to the hardware operating system, node configuration, or cluster configuration.
Verifying two different clusters by using the CCV utility
The cross-cluster verification (CCV) utility compares specific attributes of two different cluster configurations. The CCV utility compares data that is collected from different clusters, cluster snapshots, active configuration directory, or the default configuration directory of a local cluster. Learn about the requirements and data inputs for using the CCV utility, and how to use the CCV utility to compare two different clusters. Review the scenarios that illustrate how the CCV utility can be used.
Testing a PowerHA SystemMirror cluster
These topics describe how to use the Cluster Test Tool to test the recovery capabilities of a PowerHA SystemMirror cluster.
Starting and stopping cluster services
These topics explain how to start and stop cluster services on cluster nodes and clients.
Monitoring a PowerHA SystemMirror cluster
These topics describe tools you can use to monitor a PowerHA SystemMirror cluster.
Modifying the log file size by using SMIT
The Log Analytics function analyzes existing PowerHA SystemMirror log files and provides detailed information about different types of errors such as disk failures or interface failures. You can modify the file size of log files by using the SMIT interface.
Managing shared LVM components
These topics explain how to maintain AIX® Logical Volume Manager (LVM) components shared by nodes in a PowerHA SystemMirror cluster and provides procedures for managing volume groups, file systems, logical volumes, and physical volumes using the PowerHA SystemMirror Cluster-Single Point of Control (C-SPOC) utility.
Managing shared LVM components in a concurrent access environment
There are a few different steps for managing a shared LVM components in a concurrent access environment using the C-SPOC facility compared to managing a non-concurrent access environment. However, most of the steps are done in exactly the same order and using exactly the same SMIT panels as a non-concurrent configuration.
Managing the cluster topology
These topics describe how to reconfigure the cluster topology.
Managing the cluster resources
Use these topics to manage the resources in your cluster. The first part describes the dynamic reconfiguration process. The second part describes procedures for making changes to individual cluster resources.
Managing resource groups in a cluster
These topics describe how to reconfigure the cluster resource groups. It describes adding and removing resource groups, and changing resource group attributes and processing order.
Managing users and groups
These topics describe how to use the SMIT Cluster Management (C-SPOC) utility to manage user accounts and groups, this applies to LDAP as well, on all nodes in a cluster by making configuration changes on a single node, and on LDAP from any node in a cluster.
Managing cluster security
These topics describe how to configure security options to protect your PowerHA SystemMirror cluster.
PowerHA SystemMirror federated security
To successfully implement PowerHA SystemMirror federated security, you must use role-based access control (RBAC) and Encrypted File System (EFS) with PowerHA SystemMirror using Lightweight Directory Access Protocol (LDAP), as a centralized information base for clusters.
Saving and restoring cluster configurations
You can use the cluster snapshot utility to save and restore cluster configurations. The cluster snapshot utility allows you to save to a file a record of all the data that defines a particular cluster configuration. This facility gives you the ability to recreate a particular cluster configuration, provided the cluster is configured with the requisite hardware and software to support the configuration.
7x24 maintenance
The goal of high availability is to keep systems up and running, allowing continuous access to critical applications. In many enterprises, it has become necessary to keep applications running seven days a week, 24 hours a day. With proper planning, customizing, and monitoring, a PowerHA SystemMirror cluster can provide nearly continuous availability, interrupted only by scheduled, necessary maintenance.
Resource group behavior during cluster events
Look here for an overview of resource group events and describe when PowerHA SystemMirror moves resource groups in the cluster, how the resource groups are placed on the nodes, and how to identify the causes of the underlying cluster events.
Using DLPAR and CoD in a PowerHA SystemMirror cluster
You can configure PowerHA SystemMirror in a hardware and software configuration to use Dynamic Logical Partitions (DLPARs) and the Capacity on Demand (CoD) function.
Resource Optimized High Availability in Cloud
Resource Optimized High Availability (ROHA) in Cloud is a function in PowerHA SystemMirror that automatically and dynamically manages Dynamic Logical Partitions (DLPARs) resources. You can configure ROHA in Cloud with virtual server instances in Cloud, hardware resource provisioning, and cluster tunable configurations.
SAP high availability management with PowerHA SystemMirror
Using PowerHA SystemMirror, you can mange the high availability of SAP environments in the cluster. You can use PowerHA SystemMirror management interfaces to configure high availability policies and use methods to start, stop, and monitor the managed instances of your environment.
Live Partition Mobility
You can use Live Partition Mobility (LPM) to migrate partitions that are running the AIX® operating system. You can also migrate applications from one physical server to another without disrupting the infrastructure services.
Backing up and restoring an application data in PowerHA SystemMirror by using cloud storage
Understanding network instability