Note:
This topic has been translated from a Chinese forum by GPT and might contain errors.
Original topic: centos 7.x 能否使用 TuneD 设置磁盘调度程序
【TiDB Usage Environment】Production Environment
【TiDB Version】
【Reproduction Path】What operations were performed when the issue occurred
【Encountered Issue: Can CentOS 7.x use TuneD to set the disk scheduler?】
【Resource Configuration】Go to TiDB Dashboard - Cluster Info - Hosts and take a screenshot of this page
【Attachments: Screenshot/Logs/Monitoring】
I haven’t studied it, you take a look 
Install tuned using yum
Modify the configuration file and reload the TuneD configuration.
Redhat7 and CentOS7 have the tuned service installed and started by default. If not, you can manually install and start it.
You need to modify the configuration file.
I haven’t studied it, hope you can share.
I see that CentOS 7 supports this service, but the official Red Hat 7.0 documentation does not mention that it can be set up this way. This setup is for 8.0 and 9.0, so I want to ask if anyone in the CentOS 7 community has it running in a real environment.
I also read the Red Hat documentation, and the tuning settings are mentioned in the 8.0 and 9.0 documentation. So I wanted to ask if this configuration can be applied on CentOS 7, or if any experts have already applied it online, and whether there are any issues.
The key point is that the official documentation for Red Hat 7.0 does not include this configuration; it only appears in 8.0 and later versions. It’s not a matter of usage, but rather whether this configuration is supported and if there will be any issues after configuring it.
What configurations need to be modified? Do you have practical experience in production?
The presence of this program in the system installation package indicates support.
This method is only available in version 8.0 according to the official documentation. Have you tried it?
System feature: Components are only included in the system installation package after they have been tested and supported. Based on this, I just checked, and the installation package for version 7 does indeed include it.
I haven’t studied it, please share.
Brothers who have studied and used it, please share your thoughts.
Do any of the officials have an explanation for this?
Do you have any special requirements? Generally, the default settings are fine.
For a new environment, you might want to consider a new system. CentOS 7 is quite outdated.
I think the official documentation should also clarify this, as there are still many people using CentOS 7.