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 · Rolling migration from PowerHA SystemMirror to PowerHA SystemMirror (AIX TL3 or Administration.
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The first step is to add the storage to both of the nodes of the PowerHA cluster. The next step is to create the new volume group s. Scan event summaries and read a detailed description for each event. Oracle will log an Admiistration error when it shuts down the instance due to inconsistent timers.
Subsystem Hacm is On both nodes, make sure that the disk attributes are set correctly. In the case of SAN storage, please ensure that your storage administrator adds the storage to both nodes of the cluster.
UNIX Health Check – PowerHA / HACMP
The behavior is configured with the -x flag for the xntpd daemon. A description of the possible cluster states: Failed retrieving cluster information. In this case the guard state can be temporarily overridden by the “noguard” option to the mount command: For PowerHA, a new volume group should be configured as concurrent-capable configured by the -C option of the mkvg command. Information on how to install and start using it can be found on the IBM website.
The command needed to generate the report is clmgr. 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 Next, sync the cluster, which should bring the volume group s online: And when you run “lspv” on the second node after running cfgmgr, you’ll notice that the PVID is already set for all the discovered disks it was set on the first node.
Now, this may differ for the type of storage used so please make sure to check your storage vendor’s recommendations on this topicbut a good starting point is for example, for disk hdisk4: 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.
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.
This is version 9. If clstat is not working, you may get the following error, when running clstat: View properties for a cluster such as ugide PowerHA SystemMirror version, name of sites and nodes, and repository disk information.
Search and compare log files.
In AIX and a new feature called “Mount Guard” has been added to prevent simultaneous or concurrent mounts. It will also show you where any resource groups are active. For that purpose, run the following command on all cluster nodes, which lists the available major numbers: Sometimes, even after doing this, clstat or cldump still don’t work.
In its default configuration, NTP will periodically update the system time to match a reference clock by resetting the system time on the node. 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.
You can create additional volume groups, logical volumes and file systems as it pertains to your situation. To check the current running configuration of xntpd for the -x flag: This tiny but effective tool accepts the following flags: While PowerHA can give concurrent access of volume groups to multiple systems, mounting a JFS2 filesystem on multiple nodes simultaneously will cause filesystem corruption.
Using the IP addresses of a cluster and the administratlon command, you can remotely retrieve cluster status information, and use that information to build a webpage. If a filesystem appears to be mounted on another server, and the feature is enabled, AIX will prevent mounting on any other server.
The only exception to this is mounting the filesystem read-only, where files or directories can’t be changed. This still adminiwtration provide an overview in a single look, as the clstat. 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.
Commands clstat or cldump will not start if the internet MIB tree is not enabled in snmpdv3. Then create a file system on the previously guice logical volume: Cannot mount guarded filesystem.
In PowerHA version 7. If it should not be varied on, on the other node, run: There are two ways to enable this MIB sub tree riscclsmuxpd. There are no external requirements, and it is included is the base PowerHA product. Also, the format of the log file is easy to read and identify important information. When a filesystem is protected against concurrent mounting, and a second mount attempt is made you will see this error: Untar the file that you download.
Guide to IBM PowerHA SystemMirror for AIX Version 7.1.3
Operation is not allowed because vg is a RAID concurrent volume group. Cluster services are not active on any nodes. To determine the mount guard state of a filesystem: IBM included a clstat. The first thing that we’ll need to know is a common majar number that is available on both nodes of a cluster. Mount guard override for filesystem.