Patrick Palka [Wednesday, 4 February 2026 17:35:50 CET]:
> avoid wearing down my SSD
Tangent: I did that (wear down my SSD) via compiling (and deleting) too many
tests.
Nowadays I put all my build dirs into zstd-compressed btrfs on zram. This is
my setup script:
dir=/home/mkretz/.cache/zram
use_btrfs=true
if df --output=source $dir|tail -n1|grep -q /dev/zram; then
#echo "$dir is a zram mount already. Nothing to do."
exit
fi
fail() {
echo "ERROR: $*" 1>&2
exit 1
}
sudo modprobe zram
if $use_btrfs; then
dev=$(sudo zramctl -a 842 -s 20G -f) || fail "zram device creation
failed"
sudo mkfs.btrfs -m single $dev || fail "mkfs failed"
sudo mkdir -p $dir
sudo mount -o compress=zstd $dev $dir || fail "mounting failed"
else
dev=$(sudo zramctl -a zstd -s 60G -f) || fail "zram device creation
failed"
sudo mkfs.ext4 $dev || fail "mkfs failed"
sudo mkdir -p $dir
sudo mount $dev $dir || fail "mounting failed"
fi
sudo chown mkretz:mkretz $dir || fail "ownership change failed"
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Dr. Matthias Kretz https://mattkretz.github.io
GSI Helmholtz Center for Heavy Ion Research https://gsi.de
std::simd
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