What is CAA in PowerHA?

What is CAA in PowerHA?

CAA (Cluster Aware AIX) CAA is an AIX feature that was introduced in AIX 6.1 TL6 and AIX 7.1. It helps to easily create a cluster. CAA is not used as a stand-alone package, it is used with PowerHA or with Shared Storage Pool.

What is cthags?

The cthagsctrl control command controls the operation of the group services subsystem (cthags) under the control of the system resource controller (SRC). An instance of the group services subsystem runs on every node of a cluster.

What is cluster Aware AIX?

The Cluster Aware function of AIX was introduced with AIX 7.1 and AIX 6.1 TL6. This new technology builds clustering technologies into the AIX base operating system. Cluster Aware provides the AIX kernel with heartbeating, health management and monitoring capabilities.

How do I replace a Hacmp repository disk?

From the SMIT interface, select Problem Determination Tools > Replace the Primary Repository Disk, and press Enter. In the Repository Disk field, press F4 (List) to select an available disk from all nodes in the cluster, or enter the name of the disk if a backup repository disk has not been configured.

What is repository disk?

PowerHA® SystemMirror® uses a shared disk as a central repository for managing the configuration of the cluster. Cluster-wide configuration management. Cluster messaging and heartbeating. The repository disk is used as another redundant path of communication between the nodes.

What is the difference between Hacmp and PowerHA?

– PowerHA application monitoring monitors the state of the applications. Since version 5.5, HACMP has been renamed to PowerHA (Power High Availability). The main concept behind PowerHA is the same (as before with HACMP), it helps that applications are still running even if one (or more) components failed.

How do you stop a cluster in AIX?

Procedure for stopping cluster services

1. Select PowerHA® SystemMirror® Services > Stop Cluster Services and press Enter.
2. Table 1. Stop Cluster Services fields. Field. Value.
3. Press Enter. The system stops the cluster services on the nodes specified. If the stop operation fails, check the /var/hacmp/log/cspoc.

How do I start a cluster in AIX?

In SMIT, select PowerHA SystemMirror Services > Start Cluster Services and press Enter. Indicate how you want to start cluster services when you commit the values on this panel by pressing Enter (now), when the operating system reboots by selecting on system restart, or on both occasions.

How do I add a disk to a cluster VG in AIX?

RE: Adding a disk into an enhanced concurrent VG

1. Allocate the lun to both cluster nodes.
2. Run cfgmgr on 1st node to pick up the new lun.
3. Set a pvid on the new lun.
4. Set the no reserve attribute.
5. On the 2nd cluster node, run cfgmgr to pick up the new lun.
6. Set the no reserve attribute on your hdisk on node 2.

How do I start a Hacmp?

8.3 Starting and Stopping Daemons in the HACMP System

1. Enter “smitty hacmp” to open a SMIT session. #smitty hacmp.
2. Select System Management (C-SPOC)] >> Manage HACMP Services >> Start Cluster Services.
3. In the Start Cluster Services window, enter the field values for nodes on which cluster services are started.

What is concurrent VG in AIX?

In concurrent access, the volume groups residing on shared disks are activated and can be simultaneously accessed in read/write mode by all active nodes in the cluster. When concurrent volume groups are created on AIX, they are automatically created as enhanced concurrent mode. …

How do you change VC mode to concurrent in AIX?

To make a volume group enhanced concurrent capable using SMIT:

1. Enter the following command: # smitty vg. Text similar to the following is displayed: Set Characteristics of a Volume Group Change a Volume Group * VOLUME GROUP name vgERSTZ0 * Activate volume group AUTOMATICALLY no + at system restart?
2. Press ENTER.

What is clusteredcluster Aware AIX?

Cluster Aware provides the AIX kernel with heartbeating, health management and monitoring capabilities. Using Cluster Aware AIX you can easily create a cluster of AIX nodes with the following capabilities:

What is Aix clustering in IBM PowerHA SystemMirror?

In fact, IBM PowerHA SystemMirror 7.1 and even (RSCT) Reliable Scalable Cluster Technology use the built-in AIX clustering capabilities. The reason for the introduction of cluster built-in functions of AIX was to simplify the configuration and management of high availability clusters.

What are the disk requirements for PowerHA Cluster Aware AIX?

PowerHA uses a shared disk to store Cluster Aware AIX (CAA) information. At least a 512 MB (and no more than 460 GB) shared disk is needed, for this cluster repository disk. (This disk cannot be used for application storage or any other purpose.)

What is the use of CAA in Aix?

CAA is an AIX feature that was introduced in AIX 6.1 TL6 and AIX 7.1. It helps to easily create a cluster. CAA is not used as a stand-alone package, it is used with PowerHA or with Shared Storage Pool.