Re:SSDs Have Become Fast, Except in the Cloud
by pixl97 on Tuesday February 20, 2024 @02:55PM
(#39446077)
I mean we already have readahead in the kernel.
This said the problem can get more complex than this really fast. Write barriers for example and dirty caches. Any application that forces writes and the writes are enforced by the kernel are going to suffer.
The same is true for SSD settings. There are a number of tweakable values on SSDs when it comes to write commit and cache usage which can affect performance. Desktop OS's tend to play more fast and loose with these settings and servers defaults tend to be more conservative.
This said the problem can get more complex than this really fast. Write barriers for example and dirty caches. Any application that forces writes and the writes are enforced by the kernel are going to suffer.
The same is true for SSD settings. There are a number of tweakable values on SSDs when it comes to write commit and cache usage which can affect performance. Desktop OS's tend to play more fast and loose with these settings and servers defaults tend to be more conservative.