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essentialsoftware: note btrfs compression
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@ -24,6 +24,7 @@ _{{ page.excerpt }}_
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- [Offtopic system configuration](#offtopic-system-configuration)
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- [Debian-based](#debian-based)
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- [SSD](#ssd)
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- [BTRFS](#btrfs)
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<!-- END doctoc generated TOC please keep comment here to allow auto update -->
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@ -102,3 +103,13 @@ issue):
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suffering especially on BTRFS. I have been doing fine without it for years,
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it will not help any issue, unless you want read operations to cause writes
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and eat space...
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### BTRFS
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- The above applies, `/etc/fstab` must have `noatime`.
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- `compress=zstd:0` may be helpful. It enables zstd compression, which is an
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integrated feature of BTRFS, with the default compression level (3 at the time
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of writing). The BTRFS devs are most likely wiser than me and can provide a
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reasonable balance between efficiency and CPU use.
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- The compression will happen either the next time the file is written or can
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be manually triggered through `sudo btrfs filesystem defragment -r "$PWD"`
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