VMware Fault Tolerance (FT) zero downtime protection for critical VMs. скачать в хорошем качестве

VMware Fault Tolerance (FT) zero downtime protection for critical VMs.

VMware Fault Tolerance (FT) provides zero downtime protection for critical virtual machines by creating a live, secondary copy (shadow VM) on a different host, mirroring the primary in virtual lockstep, allowing for instant failover with no data loss if the primary host fails, unlike High Availability (HA) which involves a restart. It works by continuously replicating CPU states and memory to the secondary VM, requiring specific hardware (FT-compatible CPUs, fast networking like 10GbE), and is generally limited to VMs with fewer vCPUs (like 2 or 8 depending on version/license). || How it Works (Key Concepts) __Virtual Lockstep: The primary and secondary VMs run simultaneously, with their CPUs executing identical instructions in perfect sync, writing memory pages to both. __Instantaneous Failover: If the primary host fails, the secondary VM takes over immediately, with users experiencing no interruption, effectively zero downtime. __Different from HA: High Availability (HA) restarts VMs after a failure, which involves a brief downtime, whereas FT's shadow VM is always running and ready. || Requirements & Limitations __Hardware: FT-compatible processors (Intel VT-x or AMD-V), hardware virtualization enabled in BIOS, and certified hardware from VMware's Hardware Compatibility List (HCL) are needed. __Networking: A fast, dedicated network (e.g., 10GbE) between hosts is recommended for mirroring traffic. __vCPU Limit: Typically limited to VMs with 1 or 2 vCPUs, though newer versions support more (e.g., up to 8 vCPU). __License: Requires specific vSphere licensing. || Use Cases __Mission-Critical Apps: Ideal for applications that cannot tolerate any downtime, such as databases, domain controllers, or critical business applications. __vCenter Server: Can even protect the vCenter Server itself for centralized management continuity. || Benefits __Continuous Availability: Eliminates downtime for protected VMs. __Data Integrity: Prevents data loss through real-time mirroring. Simplified Management: Easy to enable on a per-VM basis after prerequisites are met. ITSA VMware Read-Only Mode Hands-On Lab Rentals. RENT LAB @ITSA: Link https://www.itsa.cloud/contact RENT LAB @EBAY: Link https://ebay.us/m/iwfbqs Learn more at: https://www.ITSA.Cloud