Recently, I have just finished building the Lidemy Lithium Academy, an online programming course platform. Currently, the website is built on Teachable, a service that allows for quick and easy creation of course platforms.
In this post, I will discuss the background and philosophy behind Lidemy.
Three months ago, I posted on PTT ([Sharing] Free Programming Tutorial (Front-end)) saying that I was willing to provide a series of free front-end programming tutorials. Anyone with a web foundation could sign up, and I welcomed everyone to write to me with a few answers to some questions. Finally, I would select 5-10 people for training.
Recently, there was an incident where our server was attacked by a large number of requests. Unfortunately, the server was hosting a forum service. Assuming that the attack point was the forum homepage, each request would query the database and there were a lot of joins. Some of the instructions were POST, which would update the database. This caused the database to lock up and the CPU to skyrocket, leading to a crash.
If the forum was self-written, we could add a cache like Redis between the database and application. However, this forum system is someone else’s and we cannot modify it.