Maintaining optimal VM performance during an OS upgrade requires a careful, methodical approach. First, I ensure the hardware and virtualization platform are compatible with the new OS version, checking things like CPU, memory, and disk requirements. Before performing the upgrade on any critical systems, I run a pilot test on a non-essential VM to simulate the update process and identify potential issues—this helps spot stability concerns early.

Here's a general approach, inspired by IT best practices and industry experts, for keeping virtual machines (VMs) running optimally during an OS version upgrade: Key Steps: Backup and Snapshots: Before upgrading, take a full backup and create snapshots of all VMs to allow quick rollback in case of issues. Compatibility Checks: Verify the compatibility of your hypervisor, VM operating systems, and installed software with the new OS version. Update the Hypervisor First: Ensure your virtualization platform (e.g., VMware, Hyper-V) is updated to the latest version compatible with the new OS. Staggered Upgrades: Upgrade VMs incrementally rather than all at once to minimize downtime and isolate potential issues.

Before: Plan, backup, test in a simulated environment, update the hypervisor and tune resources. During: Upgrade VMs gradually, monitor impact, and minimize resource usage. After: Check integrity, adjust settings, activate optimizations, update drivers and continuously monitor with appropriate tools.

- Schedule a group of test users to verify and validate the functionality of your upgraded OS. - If your environment is provisioned using PVS or MCS, maintain a copy of the current OS for potential emergency rollbacks. - Proceed with the OS upgrade in incremental blocks, rather than performing the entire upgrade simultaneously. - Document any potential findings or issues and address them proactively. - Monitor forums to identify issues experienced by other clients prior to your upgrade. - Inform end users of any significant changes that may impact their experience, facilitating the transition for your Helpdesk team. - Verify that the upgrade version is currently supported by your vendor (Long Term Support Release). Finally, good luck :)

To maintain peak performance when upgrading your host operating system and impacting your virtual machines, focus on carefully managing resource allocation, optimizing VM settings, utilizing high-performance storage, monitoring performance closely, and testing thoroughly before and after the upgrade; this includes checking compatibility between the new host OS and your VMs, ensuring adequate CPU, RAM, and network bandwidth are assigned to each VM, and considering potential disk space needs for updates or application changes within the VMs.

O básico é que para manter o desempenho da VM durante a atualização do sistema operacional, faça backup, ajuste recursos como CPU e memória, desative serviços não essenciais, monitore o uso de recursos, realize atualizações gradativas e garanta largura de banda adequada.

Enable Resource Balancing: Use features like VMware’s DRS (Distributed Resource Scheduler) or Hyper-V’s Dynamic Memory to balance resources across VMs automatically. Consider Upgrading Hardware: If the OS upgrade demands more from the hardware, consider increasing physical resources such as RAM or storage on the host. Document the Process: Keep detailed notes on what worked and what didn’t to streamline future upgrades.

Dividir para conquistar, ir colocando aos poucos os recursos de forma organizada e planejada. VM é um recurso poderoso para controle de recurso multidisciplinar.

When planning an OS upgrade, it’s essential to consider the criticality of the applications running in your environment. Follow these steps for a smooth upgrade process: 1. Test Compatibility: Ensure the new OS is compatible with your applications, such as Docker, Kubernetes, and others. 2. Backup and Restore: Create a full backup of your system and verify that the restore process works as expected. 3. Use a Blue-Green Deployment Strategy: If possible, implement a blue-green strategy where part of the infrastructure remains operational while the other undergoes maintenance. 4. Schedule During Low-Demand Periods: Perform the upgrade during times of low demand to minimize disruptions.

Eu optaria por usar, se possível, migrações ao vivo (live migration), reduzindo o tempo de inatividade percebido, executaria a atualização de forma incremental, começando pelos nós menos críticos, para validar a estabilidade. Em paralelo, manteria um plano de rollback, documentando cada alteração para reverter rapidamente em caso de falha. Após a atualização de cada nó, executaria verificações de integridade automatizadas para confirmar o funcionamento esperado e coletaria feedback do desempenho diretamente das VMs e usuários finais. Também é válido montar métricas de desempenho, ajustando configurações como alocação de recursos, agendamento de CPU e política de memória virtual para otimizar o uso do hardware subjacente.