Disk Performance
Sequential Write
dd if=/dev/zero of=/tmp/tempfile bs=1M count=1024 conv=fdatasync
:'
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 0.521978 s, 2.1 GB/s
'
Sequential Read » Clean Buffer
echo 'sync;echo 3 >/proc/sys/vm/drop_caches'|sudo bash
dd if=/tmp/tempfile of=/dev/null bs=1M count=1024
:'
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 0.978744 s, 1.1 GB/s
'
Sequential Read » Using Buffer
dd if=/tmp/tempfile of=/dev/null bs=1M count=1024
:'
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 0.151489 s, 7.1 GB/s
'
Playground
echo 'sync;echo 3 >/proc/sys/vm/drop_caches && swapoff -a && swapon -a'|sudo bash
free -th
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echo 'apt update;apt list --upgradable;apt upgrade'|sudo bash
bottom
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docker network prune -f
docker volume prune -f
docker system prune -f
docker image ls
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cat <<'EXE' | bash
for d in system network volume
do docker ${d} prune -f;done
EXE
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cat <<'EXE' | ssh [email protected]
for d in system network volume
do docker ${d} prune -f;done
EXE
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References
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