Welcome to the Data Center Automation Blog, where you can read the perspectives from storage management experts. This Blog provides insights into the data center automation solution, as well as technical details about specific IBM products.
Given a 2 node domain, what option do you have to allow a single node to obtain Operational Quorum after bringing one node offline and knowing your TieBreaker device will not be accessible from the surviving node ?
Firstly, if you want to know more about "Quorum", check out one of my earlier blogs:
There are a number of scenarios where clients have ended up with a surviving... [More]
Why are you using the Tivoli System Automation for Multiplaforms (TSAMP) product with your DB2 HADR or DB2 HA Shared Disk environment ?
The answer should be to keep the DB2 service highly available (and provide some operational convenience via some basic automation TSAMP can provide).
But how do you know your HA environment is prepared for that unexpected problem. In my mind, its similar to a "backup" you take to help you recover from an unexpected event ... how do you know the backup is good and will restore when you need... [More]
Ever tried to bring a resource offline only for it to result in a state of "Stuck online" ?
A "Stuck online" situation could also prevent a move request (failover) since the first step of a move is to stop/offline all resources that are in the scope of the move.
Your first sign of a "Stuck online" situation will likely be from the output of the 'lssam' command. Here is some sample lssam output :
Stuck online... [More]
The Open Program for IBM Tivoli System Automation started.
We are developing the next version of our products:
Tivoli System Automation Application Manager (SA AppMan)
Tivoli System Automation for Multiplatforms (SA MP)
In the Open Program, we are going to
show you selected features and improvements that we intend to include in
future releases of SA AppMan and SA MP. We are looking forward to
discuss these features and improvements with you and receive your
You have the chance to... [More]
in case you haven't seen this so far...... With the introduction of Tivoli System Automation Application Manager (SA Application Manager) version 220.127.116.11 (available since Q4 2011) the SA Application Manager has been enhanced to automate (start/stop) resources that are monitored by IBM Tivoli Monitoring (ITM).This new capability allows ITM customers to not only monitor SW components, but also control and automate SW components which are so far monitored by ITM. A simple example is a multi-tierd online banking application with software... [More]
A new link has been added to the Best Practices section of the SA Application Manager WIKI. Following this link will provide you with information how to use SA z/OS, SA for Multiplatforms and SA Application Manager to automate and manage an SAP environment cross-platform. Best Practices SA Application Manager
Did you know that you can comment on or rate pages in an information center? Feedback on the documentation helps us to understand which areas of the documentation need improvement or more information, and what topics our customers find useful. This video shows the Tivoli Provisioning Manager information center, but the same steps can be used for any information center that has the collaboration features enabled. The Tivoli Provisioning Manager team checks for comments regularly, and we use the feedback to improve the information when we publish... [More]
In How Tivoli Provisioning Manager integrated usability testing in Agile - Part 1 we talked about 3 points on how usability testing fits into the development cycle. In part 2, I will be sharing some other points to make this activity successful. 4. We tested “anything” By testing items that were not complete, we received excellent feedback about the end-to-end customer scenarios and important features that were needed. For example, we tested various designs to validate the general flow of a task from the business perspective. The feedback... [More]
The Tivoli Provisioning Manager development team has implemented usability testing in the Agile development process. By allowing customers to experience the product while in development, we are building a strong partnership with our customers to shape the solution that they need. Here are the main points that we followed to be able to fit formal usability testing into the Agile schedule. By doing so, our team greatly improved the task flow and user interaction for the features tested. 1. We created a team Our usability team is... [More]
To understand how things are organized in a TSAMP/RSCT environment, we start with the idea that almost everything is considered a resource. Of course there are different kinds of resources and that is where we introduce the concept of a resource "class". Then there are different Resource Managers, each responsible for managing or controlling resources that belong to a particular set of resource classes. The following diagram shows the mapping of three key Resource Managers to some Resource Classes they manage and then to some example... [More]
A Network TieBreaker is a popular configuration option for a Tivoli System Automation for Multiplatforms (TSA MP) managed environment.
But what is a TieBreaker and why is it needed ? To understand the what and why, you first need to understand the concept of "quorum" ... please see my blog titled "TSA Blog Series: High Availability Concepts - What is Quorum ?" https://www.ibm.com/developerworks/community/blogs/d6a38b59-943a-434b-a473-b408ed64847d/entry/what_is_quorum?lang=en
... in a nutshell, a... [More]
"The Majority Rules !"
In a nutshell, you have Quorum if you have the majority.
Quorum is the number of "operational" nodes in a cluster that are required to control the resources, modify the cluster definition, or perform certain cluster operations.
The main goals of quorum operations:
- identify who has the majority when a cluster is broken up into sub-clusters
- keep data consistent, especially when shared file systems are being used
- protect critical resources … maintain HA control
IBM Tivoli System Automation for Multiplatforms
- Introduction & Overview -
A software solution that leverages policy-based, self-healing and cross-platform application automation capabilities to realize monitoring and operation of a multitiered environment, manage outages, automatic recovery and movement of resources. (Tivoli System Automation for Mutiplatforms will be abbreviated as SAMP in this article.)
High availability : A system that is continuously available and... [More]
The Pulse 2012 workshops including VMware images (IBMers only) are available: F05 DB2 High Availability and Disaster Recovery In this lab exercise, you learn how the IBM DB2 High Availability and Disaster Recovery feature works with automatic failover using IBM Tivoli System Automation for Multiplatforms to make DB2 highly available. Three virtualized Linux hosts are preinstalled with the appropriate software packages (DB2 production installation without instance, db2_install). However, no other configuration has been applied to give you a... [More]
Automation with Tivoli System Automation products family in virtual environments has been presented on the GSE Power-Systems conference in Munich on 21.11.2011. Virtualization technologies play an important role in datacenters – they also provide the base for currently hot discussed “cloud” infrastructures. There is a lot of focus on virtualization technologies for distributed server platforms like zVM, VMware, System p’s Hypervisor, SUN Solaris Zones, and others. Of course, virtualization provides several benefits this presentation... [More]