Linux Tips - Ramfs vs Tmpfs (RAM-Disk Benchmark 2024)

[@dl8cy]

Thank you for sharing your knowledge and greetings from Berlin, Germany

[@MetaLexxer]

Thank you for the great video! Since tmpfs can swap to disk, a use case for ramfs is to limit I/O and wear out for SSDs.

[@pranaypallavtripathi2460]

One can also looks into cramfs and squashfs if interested. IIRC they are used in embedded systems quite often. Also see overlayfs which is used to persist the changes made to squashfs, etc.

[@adithya_g]

Thanks for doing this video. I have been interested in exploring tmpfs to improve build speeds. I noticed only 5% improvement in build speed vs SSD that is overall made worse by the fact that I need to copy 100GB of code into RAM that takes much longer. I created a tmpfs drive of 400 GB ( my PC has 768 GB RAM). I then benchmarked it using KDISKMARK. I noticed the sequential read/write is faster on NVME SSD by a small margin. For RND read/write, RAM is much faster 4x-10x. I was expecting seq read/write also to be much faster that NVME. Is that weird?

[@asmasm138]

Can you check multithreaded read performance of a ram disc and ssd in order to compare bandwidth

[@asmasm138]

I am also interested what happens to the system, when bandwidth of reading from ram disc is very close to maximum

[@pcpll]

It lags.

[@plutukneptuk]

could you please make a video for fast booting , because many linux live versions boot very slowly

[@horapusa268]

mine goes arround 15000MB/s (DDR5 4800Mhz)

[@Royaleah]

What about zram?