used to implement HACMP in a virtualized environment and to plan for, configure and following course (or equivalent experience): AU HACMP System. This edition applies to HACMP for AIX and HACMP/Enhanced Scalability ( HACMP/ES), Program. Number expected to have completed the course AU /usr/lpp/doc/release_notes IBM courses: HACMP Administration I: Implementation (AU54) HACMP Administration II: Maintenance and Migration ( AU57) HACMP.
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RG1 is 5 resource group and other 2 resource groups are concurrent groups. Site based cluster can be stretched cluster or linked cluster, stretched cluster is at same location where as linked cluster is configured where data centers are at different geographical locations.
Cluster is created from SiteANode1 and changes are propagate on all nodes in cluster through verify and sync feature. So manual intervention is required as per hacmp.
An application will be added to resource group under a volume group and a file system will be created on it. This article explains how to use the IBM PowerHA SystemMirror feature to get a cluster into stable state in case of any applications or resource failure due to wrong input without stopping cluster services.
Figure 1 shows a four-node stretched cluster setup. So, in that case resource group has to be brought ONLINE manually after rectifying the wrong input on all nodes, where as if resource group is in ERROR state on one node, recovering from cluster script failure can get it to proper state after correcting wrong input. This article explains resource failure with an application failure under the resource group. Here, applications and file system will be added to resource group RG1.
Assume that there is an application which is at home directory in server and we need to make that application highly available with PowerHA. Application under that Resource group is also not started.
Subscribe me to comment notifications. If there is wrong path in script only on one node, resource group will try to come ONLINE on that particular node but after completing 3 restart count it will fall over to next node as per restart count set in Figure 3if next node has everything correct in application then cluster will be stable and resource group will come hacmmp on that node.
This application is a resource under resource group RG1. Therefore, a cluster recovery from script failure will get cluster to proper state and EVENT will be completed in hacmp. This will ask for which resource group to be selected to add applications and file system to it.
View image at full size. The first field is mandatory as it ask about the controller name. Monitor script is not yet added so it wont display.
So there will be an application controller start,stop script, and also monitor script to monitor application in a cluster. PowerHA provides feature that allows a cluster to come into stable state and resource active as per the policy after correcting wrong input without stopping the cluster services. The following section describes how to enter the parameters shown in Hzcmp 3, while creating an application monitor. This article explains about configuring base PowerHA cluster with two nodes.
This article describes how to recover from application yacmp in a cluster using four nodes stretched cluster. Established a monthly capacity plan.
PowerHA/XD:Extended Distance and Disaster Recovery-AIX-昂立IT教育集团WAP版-专注职业IT教育
Businesses Deliverables Maturity Date Encryptions Encryption summary document Between 5 and 10 encryptions per month in haccmp with 1 permanent member of the team Assistance to, and reporting on the committees’ technical capacity Adjustment recommendations to adapt production resources by application 1 committee per month alternatively Pseries and HyperV Assistance provided for 5 working days before the committee Summary sent 3 business days after the committee meeting Optimisations Records specifying the proposed optimisations and the expected gains Forecasts Monthly capacity plan Prior to the 15th day of the following month Managed incidents for various clients, implemented performance indicators on the system.
This article can help users to get recovery from cluster failure due to failure in a resource or application caused by the wrong input. X and Toad o Approved technical solutions proposed by suppliers. Proposed yacmp implementation of optimisations to limit the cost of Infras while guaranteeing the level of service requested by different business networks.
Run the smit hacmp command at the command prompt.
Recovering from a resource failure in IBM PowerHA cluster
Second field is to add start script and third field is to add stop script. There are chances, that due to wrong input in resource or applications, cluster might not come to stable state and resource group might go to error state. If a script is failed because of the wrong input to PowerHA, the Cluster Manager will report failure in hacmp.
To understand this with application failure, we will change the path for application in start scripts on all the nodes. The following cltopinfo utility output shows a basic cluster information.
AU54 – HACMP System Administration I – Planning and Implementation
Figure 2 shows screen for hacm; application controller scripts. Monitor script can be added after creating application controller hacm; before application controller also. An application controller name is user defined. This section demonstrates how to add application controller and monitor scripts are added to PowerHA cluster. Similarly more than two nodes cluster can be created along with Site separation based on repository disk.
This will allow cluster to get stable on that nodes and if script is correct resource group will come online on that node. After starting the cluster services, due to wrong input into script it will keep on restarting application controller because of restart count. If resource group on all the nodes go to ERROR state that means wrong input is there on all the nodes.
User need to manually change the wrong input after seeing error in to hacmp. An application will not be able to stabilize with that wrong path in above mentioned script.
Implemented, prepared and hosted technical capacity committees with the SCS cluster aiming to cover the perimeter of shared technical infrastructures offered by CAPS. Customer can get a cluster to a stable state and a resource group to an accessible state after rectifying the wrong input to their resources.
Comments Sign in or register to add and subscribe to comments. Run the smit hacmp command at the command prompt and select the following options. Deliverables for each business are described in the table below.
Therefore, in this case application app1 is failed because of the wrong path mentioned for an application in the start script. After changing the script manually, HACMP will provide feature to recover from failure which will run a clruncmd script under cluster utilities.
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