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IBM System Storage Ideas Portal

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Status Future consideration
Created by Guest
Created on Oct 16, 2023

Provide RWX Block Storage for Kubevirt/Openshift Virtualization

Kubevirt ( hugely benefits from the fact that you can do a live migration (like a vmotion) from VMs in a Kubernetes Cluster.
Since VMs are just pods these pods cannot be migrated, but need to be created and deleted.

To achieve this you need the PVC to be RWX (read write many) to be able to be attached to both the new and the old node/pod while the kubevirt does the synchronisation of memory etc.
Kubevirt handles the IO of both pods and therefore ensures that there are no writes done simultaneosly which would result in a inconsistency.
Yet kubernetes need to be able to attach the storage on both sides.

Since kuebvirt allows you to host the remaining VMs besides your growing containerized workload it probably will become more and more relevant to enterprise customers.

Idea priority Medium

Support RWX access with OpenShift Environments

We have several opportunities to propose flash systems/Storage Virtualize as the back-end of an Openshift environment where applications need to manage PVs in both RWO and RWX modes. Up to date it is not possible to have RWX access but only RWO. A...
6 months ago in IBM Spectrum Virtualize / FlashSystem 1 Future consideration