VM: When Compute Moves but Data Stays
summary
KubeVirt performs live migration moves CPU and memory but not local disk by copying snapshots and deltas, freezing source, applying deltas, and resuming the target, yet local volumes stay behind. NFS and SAN avoid copies but deliver poor performance; erasure/replicated distributed storage pays network tax. The proposed solution is distributed storage with node affinity that keeps primary data on the VM host, maintains failover replicas, and performs transparent data realignment with the migrating VM so compute and data move together.
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