[vbezhenar]

May be with very high-end servers it is. But generally it's not. I can buy 4TB HDD For $200. I think, I'll have to add 2-3 zeros for 4TB RAM machine, and I'm not even saying only about RAM, I need some server motherboard, some server processor, while I can use 4TB RAM HDD with pretty much any computer. And SSD isn't going to be even with HDD in near future as well for $/Byte. So optimizing software for HDD won't go anywhere. But, of course, it's awesome to have some alternatives if you have money and need more performance.

[zeusk]

NVMe drives which are approaching RAM speeds are a good compromise if RAM and server components are outside of your financial reach.

[FractalNerve]

@Zeusk is right, I wish costs of SSD-RAMs like Diablo Memory1 [1] were more affordable or transparent.

Summary performance comparison by Storage Class: http://xitore.com/what-is-nvm-x

    NVM-X RAM ≈ DDR4-3200 ↧Availability|↥Cost| ↥4TB@25,6 GB/s
    Diablo Memory1        ↥Availability|↥Cost|↱256GB@10GB/s

EDIT, added source: [1] http://www.diablo-technologies.com/memory1/

[dis-sys]

many NVMe drives on the market are useless jokes. try some from the now biggest semiconductor company, test their fsync() performance and don't get a heart attack for seeing those ugly numbers. ;)

[olavgg]

This!

https://forums.servethehome.com/index.php?threads/did-some-w...

[dis-sys]

hi olavgg, I was searching for fast fsync & low cost NVMe SSD a few months ago, so I looked into consumer NVMe SSDs. Samsung 960 Pro was the first I tested, the results were just shockingly bad. It was so bad to the extent that I started to question whether my kernel/installation caused the slowness issue. Searched online and found a few of your posts talking about the exact same problem you saw. That saved me quite a bit time. :)

Yes, totally agree with the conclusion in your link above, consumer SSD (NVMe or not, high end or cheap) doesn't worth a dime. Cheers!

[pvg]

For a very generous definition of 'approaching'.