Disk IO performance optimization method for building a web server under CentOS 7
Abstract: This article will introduce how to build and optimize the disk IO performance of a web server under the CentOS 7 operating system. By properly configuring the operating system and hardware parameters and using some technical means, the server's disk IO performance can be greatly improved, thereby improving the website's response speed and throughput.
When installing CentOS 7, we can choose manual partitioning and select the XFS file system as the file system of the root partition. If you have already installed CentOS 7, you can do this by reformatting the root partition and changing it to the XFS file system.
The command to install XFS is as follows:
The command to change the root partition to the XFS file system is as follows:
Common disk schedulers include CFQ, Deadline and NOOP. In server applications, deadline schedulers tend to have better performance. We can change the disk scheduler by modifying the following file:
Add the following content:
ACTION=="add|change", KERNEL=="sda", ATTR{queue/scheduler}="deadline"
Then, restart the server for the changes to take effect .
First, we need to install the mdadm tool:
Then, use the following command to create RAID 0 or RAID 10:
After the creation is completed, we need to format and mount the RAID device:
In order to automatically mount the RAID device when the system starts, we need to modify the following files:
Add the following:
/dev/md0 /mnt/raid ext4 defaults 0 0
The operating system and key applications can be installed on the SSD, while the data is stored on the traditional mechanical hard drive. This can reduce costs while ensuring reading speed.
Taking Redis as an example, first we need to install the Redis server:
Then, we need to modify the following files to enable the caching function of Redis:
Find the following line and modify it:
Change it to:
maxmemory 1GB
maxmemory-policy volatile-lru
Restart Redis for the modification to take effect.
Conclusion:
By properly configuring the file system, disk scheduler, RAID, using SSD and caching technology, we can effectively improve the disk IO performance of the web server under CentOS 7. By optimizing disk IO performance, we can improve the server's response speed and throughput, thereby improving user experience.
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