elpadre

raid 0 will only have good speed if there are many hdds in an array. If there are only 2 sata in raid0, it cannot handle much load. If ssd or nvme then ok. Kvs backup can only be trusted if it was not saved to the raid0 array, since everything will be lost if the array crashes. In the case of several 20TB+ data losses, it will not take much time to restore the movies, but the many small screen images etc... We use many big tube kvs sites, on our own local servers in my country, believe me raid 0 is not a good solution in the long term. 2 sata hdd in raid0 cannot serve many users at the same time. For us, the backup is more important than the main server, it takes years of work, it's not a hobby but a business. But if you're starting now, good luck. I just shared the pitfalls...

Hi, Cpu is important, but there are no huge differences. The bottleneck will be the hdd speed, if you have a lot of traffic it is worth using a multi server. I would choose the cheaper amd cpu to start with, then you switch in the future when you reach a higher traffic.

Hi, Raid 0 is the worst choice, because if one of the disks is faulty, the entire array is lost. (min 2 disk) Raid 1 is better in that it mirrors the contents of hdd A to hdd B. (min 2 disk) The best choice is to use raid 10, because there the security is better and the speed is excellent. (min 4 disk) You should know that raid does not protect against data loss, always have a backup.

Hi, %iowait 20-30% very high... Mysql is also slow because the disks are loaded. The only good solution for this is if you use ssd/nvme drives or raid 10 sata hdd arrays. If everything runs only from a sata hdd, it will slow down very quickly.

Hey, what mpm php are you using? prefork? event? worker?

I think you overconfig sql...Sent pm

I think 64 mb memcached memory very small, incrase minumum 2-4 Gb. My tube using kvs on centos/apache fpm dialy unique 25k/ total 100k and MemCache load: 975 Mb / 4 Gb (23%)). LA peak 0.8 without convert. I think you have a problem with the apache / nginx / sql settings. Or I saw in the screenshot that you are converting thousands of movies every day, then the load goes high on any fast server. I saw you have a separate database server, I think you should transfer the conversion there not to use it locally.