Enhanced Scalability Installation and Administration Guide – SC 6. Press Enter. The system adds these values to the HACMP for AIX ODM and. Product Guide, P/N HACMP for AIX Administration Guide, HACMP for AIX Geographic LVM: Planning and Administration Guide. Selection from Guide to IBM PowerHA SystemMirror for AIX Version [Book] PowerHA SystemMirror ยท Rolling migration from PowerHA SystemMirror to PowerHA SystemMirror (AIX TL3 or Administration.

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To determine the mount guard state of a filesystem: If a filesystem appears to be mounted on another server, and the feature is enabled, AIX will prevent mounting on any other server.

Failed retrieving cluster information. Now run “lspv” on both nodes of the cluster, and look at the PVIDs listed. You can download it here: This may be caused by the volume group being varied on, on the other node. At this time, the storage is properly configured on both nodes, and it is time to add the volume group s to the PowerHA resource group.

For the purpose of this article, let’s assume major number 57 is available. Untar the file that you download. To avoid this issue, system managers should configure the NTP daemon to increment time on the node slower until the system clock and the reference clock are in sync this is called “slewing” the clock instead of resetting the time in one large increment.

Clstat is rather slow with its updates, and sometimes the required clinfo deamon needs restarting in order to get it operational, so this is, well, not perfect.

Per cluster you can see: The first step is to add the storage to both of the nodes of the PowerHA cluster. Scan event gukde and read a detailed 61. for each event. Finally, the major number should be set in the example below: Monitor the status for all clusters, sites, nodes, and resource groups in your environment. To check the current running configuration of xntpd for the -x flag: In AIX and a new feature called “Mount Guard” has been added to prevent simultaneous or concurrent mounts.


If it should not be varied on, on the other node, run: This article describes how to add a new volume group to an existing resource group of an active PowerHA cluster. As such, run the following mkvg command to create the volume group Note: While PowerHA can give concurrent access of volume groups to multiple systems, mounting a JFS2 filesystem on multiple nodes simultaneously will cause filesystem corruption.

Guide to IBM PowerHA SystemMirror for AIX Version [Book]

If clstat is not working, you may get the following error, when running clstat: Operation is not allowed because vg is a RAID concurrent volume group. This tiny but effective tool accepts the following flags: Oracle will log an ORA error when it shuts down the instance due to inconsistent timers. For PowerHA, a new volume group should be configured as concurrent-capable configured by the -C option of the mkvg command.

Next, log in to the other node, and run the cfgmgr command on that node as well, so the disks will be discovered on the other node as well.

Guide to IBM PowerHA SystemMirror for AIX Version 7.1.3

In its default configuration, NTP will periodically update the system time to match a reference clock by resetting the system time on the node. For that purpose, run the following command on all cluster nodes, which lists the available major numbers: The command needed to generate the report is clmgr.


This is version 1. This behavior is usually seen in AIX 6.

The next step is to guice the new volume group s. You’re probably familiar with the clstat or the xclstat commands. Using the IP addresses of a cluster and the snmpinfo command, you can remotely retrieve cluster status information, and use that information to build a webpage.

These attributes are stored in the ODM of the AIX system locally, and don’t automatically transfer over to other nodes of the cluster, so you’ll have to set these attributes for all new disks on all cluster nodes. Mount Guard is not enabled by default, but is configurable by the system administrator.

If it continues to be a problem, then stop HACMP on both nodes, export the volume group and re-import the volume group on both nodes, and then restart the cluster. There are no external requirements, and it is included is the base PowerHA product. To turn off mount guard: Also, the format of the log file is easy to read and identify important information.

Pick one of the disks on which you configured the volume group on the first node, and take that disk’s PVID, for example 00facb28b After enabling the Bacmp entry above snmp daemon must be restarted with the following commands as shown below: Next, create a logical volume adjust per your situation and preference: A description of the possible cluster states: