Btrfs defrag on SSD (Solved)

[BluishHumility]

Here is a link to a response I wrote a while back for a similar question:

Recommended BTRFS Assistant configuration

This is is not outright incorrect, but it is a very broad generalization and some use cases are more nuanced. Specifically with regard to Btrfs, this is not accurate. The reason defragmentation is "not recommended" on an SSD is because it costs a write, and for many filesystems does not provide a benefit. It's not inherently problematic, just not really helpful and somewhat wasteful since excessive writes is exactly why SSDs die. For Btrfs, however, there is a benefit to defragmentation becau…

The TL;DR would be:

• In the case of Btrfs, there is a performance benefit to moderating fragmentation on the disk, even on an SSD
• The cost of adding a write to the disk for this kind of maintenance is fairly modest compared to years past, as SSDs have grown more robust.

I hope that helps, welcome to the community @growler.