If Scrubs Hurt, Your ZFS Design Is Broken

When your monthly ZFS scrub cripples production performance, it signals a fundamental design flaw rather than a scheduling issue. I explain how oversizing pools for capacity while ignoring IOPS leads to fragmentation and latency. The solution involves offloading metadata to a dedicated special VDEV using enterprise SSDs, ensuring maintenance tasks like scrubs and resilvers run smoothly without disrupting your application workloads.