I was wondering the other day why wouldn’t one place all the htdocs related files in a RAM disk.
It seems to me, that this would greatly improve the time it takes for the disk to lookup and read files, greatly improving performance – specially for high websites with a high concurrency hit rate.
Is there a package that can implement this in a transparent way for reading operations, while at the same time making sure the write operations are safely stored on disk? If not, is there a reason not to?
Answer
Is there a package that can implement this in a transparent way for reading operations, while at the same time making sure the write operations are safely stored on disk?
Yes there is, it’s part of the operating system.
All modern operating systems have what is called a filesystem cache. This is a portion of RAM that is unused for any applications that gets used by the kernel to store recently accessed files. It is also used to store recently written files until they are periodically flushed to the disk.
When an application needs the RAM, it is transparently given up by the kernel.
Attribution
Source : Link , Question Author : Alix Axel , Answer Author : Ladadadada
