Re: Could RAM possibly be just 3-4 times faster than bare hdd writes and reads? or, is the Linux kernel doing its 'magic' in the bg? or, ...
Hello,
On Wed, Jun 17, 2020 at 12:17:58PM +0200, Albretch Mueller wrote:
> also, if in order to use RAID 10 you need 4 drives
Linux mdadm can do RAID-10 with 2 or more devices (also doesn't have
to be an even number).
> (but the dollar per Gb is approaching $0.02) and you get 1.5
> faster performance, what is the economy of "bying more RAM" if it
> is so much more expensive?
RAM and storage devices are completely different things, are used
for different things, and your question is unanswerable without a
better description of your workload and probably some benchmarking.
Also, even main system RAM is vastly faster than 3x HDD.
https://gist.github.com/jboner/2841832
like, 80 times faster.
> Any comparison on HDD, SSD and RAM including pros and cons which is
> worth reading?
It's not possible to provide you with anything but the most basic
comparison unless you describe exactly what you are trying to do.
Cheers,
Andy
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