Re: Swap space choice on a SSD <- Current best practice on?
David Christensen wrote:
> On 2/13/19 6:11 AM, Dan Ritter wrote:
> > If you want maximum SSD longevity, increase the amount of space that
> > the SSD can use for remapping by never writing to some amount of
> > space. Easiest is to not fill the disk with partitions -- leave 5-10%
> > empty.
>
> AFAIK over-provisioning has no effect on longevity -- longevity is
> proportional to total number of cells times rated erase/ write cycles
> per cell divided by write throughput.
>
>
> But, over-provisioning can improve write performance:
>
> https://en.wikipedia.org/wiki/Write_amplification#Over-provisioning
Effective longevity depends on the number of times a block is
erased and written to. You can reduce that over the course of an
SSD's lifetime by limiting the space you think you have
available.
>From the article you cited:
"Over-provisioning often takes away from user capacity, either
temporarily or permanently, but it gives back reduced write
amplification, increased endurance, and increased performance."
Increased endurance is increased longevity.
-dsr-
Reply to: