Ioanna Vrachnaki

Experience

• 

  CERN

  Feb 2023 - May 2024

  IT Storage & Data Management Group - Operations, Data & Storage Engineer

  Proven track record in ensuring the reliability, integrity, and availability of files at a massive petabyte scale. Adept at implementing robust solutions to prevent data loss and enhance overall data management efficiency.◈ Spearheaded the role of Service Manager for an experimental data instance, overseeing 42PB of crucial data. ◈ Demonstrated skills in maintaining peak operational efficiency while ensuring the security and accessibility of files.◈ Led the migration initiative from CentOS 7 to AlmaLinux 9 for over 1000 machines. Executed the transition flawlessly, guaranteeing zero disruption to data activities, and ensuring a smooth and efficient upgrade process.◈ Conducted in-depth analysis of hardware models, drivers, and controllers to determine eligibility for the AlmaLinux 9 upgrade. ◈ Created a comprehensive chart categorizing machines based on the eligibility, optimizing decision-making for the migration team.◈ Developed and implemented multiple Bash scripts, streamlining and automating operations to enhance overall system efficiency, but also contributing to the optimization of processes. Show less