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Today, I would like to share with you the relevant knowledge points about how to optimize disk cache read and write speed in Centos7. The content is detailed and the logic is clear. I believe most people still know too much about this knowledge, so share this article for your reference. I hope you can get something after reading this article.

The / dev/shm directory in Linux does not belong to disk, but memory. If you use the / dev/shm/ directory as the read and write cache of disk files in Linux, the efficiency is amazing.

The default / dev/shm directory is not mounted. You need to mount it manually. Add the following at the end of the following file:

$vim / etc/fstabtmps / dev/shm tmpfs defaults,size=1G 0 0

Please add it according to your physical memory size, which is usually about 10-50% of the physical memory.

Mount / dev/shm/ directory:

$mount-o remount / dev/shm/$ mkdir / dev/shm/tmp$ chmod 755 / dev/shm/tmp$ mount-B / dev/shm/tmp / tmp

Note: / dev/shm/tmp will lose the mount after the system reboot, and you need to reset the mount. Here is a shell script that you can add to boot:

$vim / dev/shm/tmpchmod _ init. D _

Then add the following at the end of the following file:

$vim / etc/rc.localsh / etc/init.d/shmtmp.sh

In this way, restart automatic mount is realized. You can use memory to improve read and write performance, such as storing php session and other caches in the / tmp directory, which increases speed and efficiency exponentially.

These are all the contents of the article "how to optimize disk cache read and write speed in Centos7". Thank you for reading! I believe you will gain a lot after reading this article. The editor will update different knowledge for you every day. If you want to learn more knowledge, please pay attention to the industry information channel.

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