Infrastructure

When production database or application servers running RHEL, Rocky Linux, CentOS (7 ~ 9), or Ubuntu (20.04 ~ 24.04 LTS) reach 90%+ disk utilization, scheduling emergency maintenance downtime is rarely an acceptable option. In modern virtualization (VMware, KVM, Nutanix, SimpliVity) and cloud infrastructures, performing 100% online, non-disruptive storage expansion is an essential skill for system engineers. Here is the battle-tested standard operating procedure for triggering a kernel SCSI bus rescan, extending LVM physical/logical volumes, and expanding filesystems (XFS vs EXT4) without unmounting. ...

With VMware’s recent licensing changes, many enterprise data centers are looking closely at lightweight, KVM-based virtualization alternatives. One viable enterprise solution is HPE SimpliVity 6.2.0 powered by HPE VM Essentials (VME). In my 16 years as an infrastructure engineer deploying servers and SAN fabrics, I have found that 90% of HCI deployment failures boil down to two things: sloppy physical/VLAN network segmentation andmisplaced quorum (Arbiter) architecture. This guide condenses the entire deployment lifecycle—from pre-flight network planning to management server staging, node initialization, and automated OVC provisioning via VME Manager—with battle-tested field troubleshooting insights. ...

1. Solution Overview HPE SimpliVity VME (Virtual Machine Essentials) is an enterprise virtualization platform based on hyperconverged infrastructure (HCI) that integrates compute, storage, and networking into a unified architecture to reduce operational complexity while delivering high availability and data efficiency. By eliminating the overhead of traditional 3-tier architectures (discrete servers, SAN switches, and external storage arrays), it combines a lightweight KVM-based virtualization layer with the HPE OmniStack Virtual Controller (OVC) to streamline on-premises infrastructure. ...