iSCSI vs. NVMe/TCP: The ultimate storage showdown for Red Hat OpenShift Virtualization

151 · Red Hat · June 4, 2026, 7:53 a.m.
Summary
This article compares the performance of iSCSI and NVMe/TCP storage protocols within a Red Hat OpenShift Virtualization environment. It demonstrates that NVMe/TCP significantly outperforms iSCSI in various workloads, particularly under high queue depths and heavy I/O operations. While NVMe/TCP is recommended for modern, cloud-native applications, iSCSI remains relevant for certain legacy applications.