3 ms·
> SSD is fast enough that buffering SSD in RAM is mostly unnecessary. A very strong claim, which I'd contest depending on what you're caching. If it's applicat
by zasdffaa 5y ago
> SSD is fast enough that buffering SSD in RAM is mostly unnecessary.
A very strong claim, which I'd contest depending on what you're caching. If it's application code then probably but if you've lots of data which you're expecting to re-read such as with a database with many gigs, I really disagree with that. If an SSD had say a 1 gig/sec bandwidth for reasing that's about 22 times slower than my arthritic 7-year dual-channel RAM bandwidth[1]. A more modern higher spec server will have more channels (and hopefully more modern, faster ram).
Can you elaborate a bit on your thoughts?
[1] and the path to ram may not have as many page faults -> kernel switches as reading from an SSD, but I may be wrong and it may not matter
- kragen 5y agohttps://www.club386.com/silicon-motion-pcie-5-0-nvme-ssds-promise-14gb-s-bandwidth/ https://www.club386.com/silicon-motion-pcie-5-0-nvme-ssds-pr... says 14 GB/s. And of course the sum of bandwidths within a set of NVDIMMs can easily be much higher than that.