Virtualization: As your workload grows, instead of adding more physical servers, you provision virtual machine servers, which means you can provision a new server in minutes or even seconds. Because everything is in the same server, virtual machines avoid the overhead of additional communication and coordination, and promote:
- Efficient sharing of resources (CPUs, memory and network resources)
- Improved performance.
Virtualization is accomplished with these hypervisors:
- z/VM®. This is integrated into the full stack and has hardware awareness.
- KVM. An open source option, this can co-exist with z/VM.
Logical partitioning: You can make a server run as if it were two or more independent servers by dividing the resources into subsets called logical partitions (LPARs). LinuxONE isolates LPARs, greatly reducing the risk of east-west and north-south security breaches. With IBM Secure Service Container, you ensure that the administrators of an environment cannot access the data or applications in that environment.
For logical partitioning, you use:
- Processor Resource/Systems Manager™ (PR/SM).
- Dynamic Partitioning Manager (DPM). DPM uses PR/SM functions with a simplified user interface.