5 things to know about high-availability for Linux on System z
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Guillaume Lasmayous is an IBM Certified IT Specialist in the IBM Montpellier Client Center in Montpellier, France. He has 9 years experience with z/VM and Linux on System z, providing presales technical support to European customers considering solutions running on Linux on System z. He holds a degree in mechanical engineering from ECAM Lyon, France. Long time Linux user and open source developer, his areas of expertise include virtualization and consolidation with z/VM and Linux on System z as well as Cloud Computing and infrastructure management solutions.
When a customer is asked which applications are its most critical applications,the likely answer is "All of them are critical", but this actually not true. Not all applications are created equal.
High-availability is about removing the single points of failures in the infrastructure supporting an application. In other words, it's about redundancy, redundancy, redundancy!
3. An HA solution is as available as its least available component.
Building an HA solution is a layered approached, trying to eliminate or reduce the number of single points of failure, or SPoFs, at the different
4. Look at what's already available in the components of your infrastructure
When running an application on Linux on System z, there are already a lot of high availability features available out of the box. Hardware has built-in redundancy at all levels. But did you know that, by default, the z/VM hypervisor provides transparent failover capabilities for dedicated OSA connections and
5. People are your most important resource!
Because in the end, it will be your people who: