Tuning VM Disk Performance

Qemu/kvm provides you with a plethora of ways to configure your storage devices. Yet no other type of device shows such a variance in its performance, with disk I/O throughput anywhere from stellar to abysmal using the very same hardware.

In this post I like to show some configuration options that can help improve VM disk performance. For an in-depth presentation on the latest developments and features, with hands-on examples, see Storage Performance Tuning for FAST! Virtual Machines.

Continue reading “Tuning VM Disk Performance”

Monitoring Hard Drives Using Smartmontools

Yesterday I wrote about Linux security and the need for monitoring hard drives for failure symptoms. As if this was an omen, today the following message popped up on my screen:

Smartmontools notify: Hard Disk Health Warning

At any given time, my PC runs between 6 to 10 hard drives of varying size and make. In recent years I’ve replaced some old and small 1TB and 2TB drives for larger 3TB and 4TB drives, sometimes replacing two drives for one. I’m also adding more SSD to improve performance, but my main data storage still uses mechanical hard drives.

Continue reading “Monitoring Hard Drives Using Smartmontools”