Does ZFS Damage SSDs? Testing Write Amplification

Exploring whether ZFS causes SSD wear or write amplification, and how to configure settings to prevent damage. 🔧

Does ZFS Damage SSDs? Testing Write Amplification
ElectronicsWizardry
66.3K views • Feb 8, 2025
Does ZFS Damage SSDs? Testing Write Amplification

About this video

I often see questions asked if ZFS causes write amplification or kills SSDs. In this video I look into this and see if its true, and what ZFS settings can be used to change the amount of write amplification ZFS does.

I tried to get as much correct as I could about how ZFS works under the hood, but ZFS can be complex under the hood. I also tried to balance explaining enough so viewers can get the why of some of the settings with keeping a reasonable video length, but let me know if there are changes you would like to see.

Scripts and Raw data are on my Github here: https://github.com/ElectronicsWizardry/ZFSWriteAmplificationTests

00:00 Intro
00:34 Testing methodology and initial test
02:09 ZFS RAID effects
04:26 ZFS Sync
07:56 ZFS ashift
11:25 One final test
13:03 Conclusion

Video Information

Views

66.3K

Likes

3.1K

Duration

13:30

Published

Feb 8, 2025

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