blaine (myname.delete@this.acm.org) on December 3, 2018 3:40 pm wrote:
> Doug S (foo.delete@this.bar.bar) on July 24, 2018 7:49 am wrote:
> > David Kanter (dkanter.delete@this.realworldtech.com) on July 24, 2018 6:49 am wrote:
> > > Emil Briggs (me.delete@this.nowherespam.com) on July 24, 2018 6:30 am wrote:
> > > > If I recall correctly Micron launched a product that consisted of DDR4 dimms with a super cap and flash.
> > > > When power goes down the DRAM contents are written to the flash but otherwise it acts as a normal DIMM.
> > > >
> > >
> > > Yup, and it's about 16GB!
> >
> >
> > Sounds like a great idea, too bad I'll bet it costs at least 10x a normal 16GB DIMM!
>
> It has some legit uses like a place to write a DB log for OLTP (avoiding log commit bottlenecks). But
> not being able to access the log from a backup system in the event of a hard crash limits its appeal.

Even for log devices I'd rather use DRAM-based NVMe instead of a flash-backed DIMM. There's no dual-port U.2 version though.