Linux磁盘限速（Ubuntu24实测）

需求背景

现在个人笔记本和开发环境很多都是SSD了，但是生产环境很多还是HDD或SATA等，为了评估生产性能，需要将开发环境的磁盘速度和生产设置为相同的，更准确的评估程序上线后的性能效果

查询磁盘序号

node@hadoopslave1:~$ lsblk
NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
loop0         7:0    0     4K  1 loop /snap/bare/5
loop1         7:1    0 322.8M  1 loop /snap/code/197
loop2         7:2    0 322.8M  1 loop /snap/code/198
loop3         7:3    0  63.8M  1 loop /snap/core20/2582
loop4         7:4    0  63.8M  1 loop /snap/core20/2599
loop5         7:5    0  73.9M  1 loop /snap/core22/2010
loop6         7:6    0  49.3M  1 loop /snap/snapd/24792
loop7         7:7    0  66.8M  1 loop /snap/core24/1006
loop8         7:8    0  17.7M  1 loop /snap/duckdb/9
loop9         7:9    0  66.8M  1 loop /snap/core24/988
loop10        7:10   0 245.3M  1 loop /snap/firefox/6421
loop11        7:11   0 245.3M  1 loop /snap/firefox/6436
loop12        7:12   0  11.1M  1 loop /snap/firmware-updater/147
loop13        7:13   0  11.1M  1 loop /snap/firmware-updater/167
loop14        7:14   0 505.1M  1 loop /snap/gnome-42-2204/176
loop15        7:15   0   516M  1 loop /snap/gnome-42-2204/202
loop16        7:16   0  91.7M  1 loop /snap/gtk-common-themes/1535
loop17        7:17   0  10.8M  1 loop /snap/snap-store/1248
loop19        7:19   0  10.8M  1 loop /snap/snap-store/1270
loop20        7:20   0  50.9M  1 loop /snap/snapd/24718
loop21        7:21   0   576K  1 loop /snap/snapd-desktop-integration/315
loop22        7:22   0   568K  1 loop /snap/snapd-desktop-integration/253
loop23        7:23   0 210.3M  1 loop /snap/thunderbird/737
loop24        7:24   0 210.4M  1 loop /snap/thunderbird/751
loop25        7:25   0  73.9M  1 loop /snap/core22/2045
nvme0n1     259:0    0 476.9G  0 disk 
├─nvme0n1p1 259:1    0     1G  0 part /boot/efi
└─nvme0n1p2 259:2    0 475.9G  0 part /
node@hadoopslave1:~$ 

我限速的磁盘为nvme0n1，磁盘编号为259:0

设置限速

我限速设置
读，每秒300MB
写，每秒260MB

echo "259:0 272629760" | sudo tee /sys/fs/cgroup/blkio/blkio.throttle.write_bps_device
echo "259:0 314572800" | sudo tee /sys/fs/cgroup/blkio/blkio.throttle.read_bps_device

备注：需要管理员权限写入文件，给tee加sudo才行

取消限速

直接设置为0即可取消限速

echo "259:0 0" | sudo tee /sys/fs/cgroup/blkio/blkio.throttle.write_bps_device
echo "259:0 0" | sudo tee /sys/fs/cgroup/blkio/blkio.throttle.read_bps_device