By: Wes Felter (wmf.delete@this.felter.org), December 4, 2018 12:07 pm
Room: Moderated Discussions
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.
> 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.
| Topic | Posted By | Date |
|---|---|---|
| New article on Intel's 3DXP | David Kanter | 2018/07/23 10:02 AM |
| New article on Intel's 3DXP | Groo | 2018/07/23 01:53 PM |
| New article on Intel's 3DXP | Michael S | 2018/07/23 02:47 PM |
| New article on Intel's 3DXP | Teemo | 2018/07/23 05:38 PM |
| New article on Intel's 3DXP | Wes Felterw | 2018/07/23 09:41 PM |
| Flash DIMMs = bad idea | David Kanter | 2018/07/24 04:31 AM |
| Flash DIMMs = bad idea | Emil Briggs | 2018/07/24 06:30 AM |
| Flash DIMMs = bad idea | David Kanter | 2018/07/24 06:49 AM |
| Flash DIMMs = bad idea | Michael S | 2018/07/24 06:59 AM |
| Flash DIMMs = bad idea | Emil Briggs | 2018/07/24 08:29 AM |
| Flash DIMMs = bad idea | Doug S | 2018/07/24 08:49 AM |
| price | Michael S | 2018/07/24 03:16 PM |
| price | Doug S | 2018/07/24 03:32 PM |
| price | Michael S | 2018/07/24 03:49 PM |
| Flash DIMMs = bad idea | blaine | 2018/12/03 04:40 PM |
| Flash DIMMs = bad idea | Wes Felter | 2018/12/04 12:07 PM |
| Flash DIMMs = bad idea | RichardC | 2018/12/04 04:09 PM |
| Flash DIMMs = bad idea | Michael S | 2018/07/24 06:51 AM |
| Flash DIMMs = bad idea | Adrian | 2018/07/24 07:35 AM |
| Flash DIMMs = bad idea | Ricardo B | 2018/07/24 09:24 AM |
| Flash DIMMs = bad idea | bakaneko | 2018/07/24 06:55 PM |
| New article on Intel's 3DXP | Etienne | 2018/07/25 05:02 AM |
| New article on Intel's 3DXP | Howard Chu | 2018/12/01 06:23 AM |
| New article on Intel's 3DXP | Michael S | 2018/12/01 08:56 AM |
| New article on Intel's 3DXP | anon | 2018/12/01 09:21 AM |
| New article on Intel's 3DXP | Howard Chu | 2018/12/01 01:52 PM |
| New article on Intel's 3DXP | Adrian` | 2018/12/01 03:43 PM |
| New article on Intel's 3DXP | Adrian | 2018/12/01 11:05 PM |
| New article on Intel's 3DXP | Howard Chu | 2018/12/11 05:17 AM |
| New article on Intel's 3DXP | Adrian | 2018/12/11 05:42 AM |
| New article on Intel's 3DXP | Maynard Handley | 2018/12/11 08:20 AM |
| New article on Intel's 3DXP | wumpus | 2018/12/11 09:36 AM |
| New article on Intel's 3DXP | Anon | 2018/12/11 05:21 PM |
| New article on Intel's 3DXP | Maynard Handley | 2018/12/11 05:32 PM |
| New article on Intel's 3DXP | Anon | 2018/12/12 12:29 AM |
| New article on Intel's 3DXP | Maynard Handley | 2018/12/12 11:32 AM |
| New article on Intel's 3DXP | wumpus | 2018/12/12 12:07 PM |
| New article on Intel's 3DXP | Maynard Handley | 2018/12/12 12:41 PM |
| New article on Intel's 3DXP | Anon | 2018/12/12 03:55 PM |
| New article on Intel's 3DXP | Anon | 2018/12/12 03:49 PM |
| New article on Intel's 3DXP | Anne O. Nymous | 2018/12/12 01:14 AM |
| New article on Intel's 3DXP | anon | 2018/12/12 06:28 AM |
| New article on Intel's 3DXP | Maynard Handley | 2018/12/12 11:26 AM |
| New article on Intel's 3DXP | Anne O. Nymous | 2018/12/12 02:10 PM |
| New article on Intel's 3DXP | innocent bystander | 2018/12/12 10:34 PM |
| New article on Intel's 3DXP | anon | 2018/12/12 02:42 PM |
| New article on Intel's 3DXP | Howard Chu | 2018/12/02 05:53 AM |
| New article on Intel's 3DXP | Adrian | 2018/12/02 07:01 AM |
| New article on Intel's 3DXP | Howard Chu | 2018/12/02 11:34 AM |
| Intel's 3DXP availability | Etienne Lorrain | 2018/12/03 04:50 PM |