3.4 Cluster 1600
Today's IT infrastructure requires that systems meet increasing demands while offering the flexibility and manageability to rapidly develop and deploy new services. IBM clustering hardware and software provide the building blocks, with availability, scalability, security, and
IBM Sserver Cluster 1600 is a
IBM Cluster Systems Management (CSM) is designed to provide a robust, powerful, and centralized way to manage a large number of
The
It is not possible to use selected partitions as part of the cluster and use others for
Information about HMC control, cluster building block servers, and available cluster software can be found in the following link:
http://www.ibm.com/servers/eserver/clusters/
The benefits of clustered environment based on logical partitions
Evolving processor and storage technologies has had a great impact on the architecture of IT infrastructures. This was the most significant challenge for the infrastructure in the past and will continue to be in the future. During the first half of the 1990s, one central instance of an application per node was suitable; moreover, most productive systems needed additionally associated nodes, so called application servers.
Increasing performance and reliability by simply replicating application server nodes led to complex environments that often resulted in poor system management. The reason for these complex constructions was the limited computing power of a single node. This limitation was softened during the second half of the 1990s.
Big symmetric multiprocessor (SMP) nodes with higher clock rates and increased memory provided the ability to install more than one system on a node. This had some side effects regarding systems operations: a release’s planning processes had to pay attention to different databases, application versions, or both to avoid unresolved conflicts.
In 2000, Workload Manager for AIX (WLM) was announced. Multiple application instance installations became more and more popular because of the permanently increasing number of systems that were dedicated to applications at customer sites. The general availability of this functionality of AIX to separate the workloads of dedicated systems eliminated the last obstacle for consolidating several systems into one node.
Chapter 3. Capacity on Demand, RAS, and manageability 63