ESXi
ESXi is VMware's bare-metal hypervisor, the core component of the VMware vSphere platform. It installs directly onto physical server hardware without a general-purpose host operating system, providing near-native performance for virtual machines.
Key Characteristics
- Type-1 (bare-metal) hypervisor with a minimal footprint
- Supports running Windows, Linux, and other guest operating systems
- Managed via vCenter Server for multi-host environments
- Hardware passthrough (DirectPath I/O) for GPU and network acceleration
- High availability and live migration (vMotion) support
- ESXi Free tier available with limited management capabilities
Enterprise Use
ESXi is the foundation of most enterprise data center virtualization environments. Organizations run their server workloads as virtual machines on ESXi hosts, managed centrally via vCenter Server. This enables hardware consolidation, disaster recovery via VM replication, and operational flexibility through vMotion live migration. Veeam Backup & Replication is the most common backup solution for ESXi environments. Following Broadcom's acquisition of VMware, licensing changes have prompted some organizations to evaluate alternatives such as Microsoft Hyper-V.
