Re:IBM z14 Microprocessor and System Control Design
by derefr on Tuesday November 20, 2018 @04:14PM
(#18497792)
> A Kubernetes cluster is not a computer, it is a cluster of computers.
That statement is true, but the thing it implies isn't. A cluster of computers on a common backplane can certainly present itself as a single (NUMA) computer, with one process scheduler, one filesystem, etc. Most HPC systems are built this way.
As well, when your workloads are, themselves, VMs, there isn't much of a difference between having a Z-series machine as a hypervisor and, say, a vSphere cluster as a hypervisor. Either way, you get a pool of CPU, a pool of RAM, a pool of storage, etc. And either way, you get VM workloads with transparent migration on node hotplug/node failure, etc.
That statement is true, but the thing it implies isn't. A cluster of computers on a common backplane can certainly present itself as a single (NUMA) computer, with one process scheduler, one filesystem, etc. Most HPC systems are built this way.
As well, when your workloads are, themselves, VMs, there isn't much of a difference between having a Z-series machine as a hypervisor and, say, a vSphere cluster as a hypervisor. Either way, you get a pool of CPU, a pool of RAM, a pool of storage, etc. And either way, you get VM workloads with transparent migration on node hotplug/node failure, etc.