Putting 12 processor packages in a 1U server

By: rwessel (rwessel.delete@this.yahoo.com), July 23, 2022 7:15 am
Room: Moderated Discussions
Ben T (ben.delete@this.noemail.com) on July 22, 2022 10:02 pm wrote:
> > Do people here think the ideal public cloud infrastructure would be
> > a cluster in a box rather than a single symmetric multiprocessor
> > running virtual machines from multiple users? For example, imagine
> > a 1U chassis containing 12 processor chips and 12 hot-swap
> > 2.5” U.2 NVMe drives. Each processor chip could include:
> >
> > 8 performance CPU cores plus caches
> > interfaces to two 128-bit LPDDR DRAMs
> > 4 PCIe lanes to connect to one NVMe drive
> > a 10G ethernet connection
> >
> > If the minimum unit a cloud user could get is 8 cores, they would not
> > be sharing this chip with anyone else so the risk of data leakage
> > between users would be greatly reduced. If it is possible to combine
> > these processor units for bigger single tasks but still keep them
> > partitionable into independent units for small tasks, that would be even better.
> Here is one way to put 12 processor packages in a 1U server. To fit in a standard 19” rack, the width of
> the motherboard has to be at most 17” (43.18cm). To have a single row of processor packages across the
> width of the chassis, each processor package could be about 3.4cm wide with a .2cm gap between packages.
> A processor package containing two LPDDR5X DRAM packages would be rectangular with the processor die in the
> middle and an LPDDR5X DRAM package on two opposite sides of the processor die. An LPDDR5X DRAM package is
> 1.4cm x 1.4cm. Apple’s M1 Max die is 2.16cm x 1.99cm so this all fits comfortably in a 3.4cm wide package.
> The long side of the rectangular processor package would be parallel to the air flow in the chassis. An alternative
> would be to have two rows of six processor packages (P) with a big gap between each package in a row so that
> cool air can reach the row of packages farthest from the air intake, like this:
> P_P_P_P_P_P
> _P_P_P_P_P_P
> A reason to have 12 processor packages is that the number of 2.5” drives that fit across the front
> of a chassis is a multiple of 12 (12 in a 1U chassis, 24 in a 2U chassis). Less fan power is needed
> when the heat sources are spread out instead of concentrated in one or two processor sockets.
> Does this seem practical?

I don't see that 2.5" form factor drives should be a consideration. One of the M.2 NVMe devices would seem to be much better suited to such a device.

It should certainly be possible to fit a dozen of these in a pizza box. Consider the sizes of something like Nano- or Pico-ITX motherboards.
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Retbleedanonymous22022/07/13 03:14 PM
  Retbleedanon22022/07/13 10:03 PM
    RetbleedAdrian2022/07/14 12:05 AM
    RetbleedAnon42022/07/14 02:17 PM
      Retbleedanon22022/07/14 04:29 PM
        RetbleedAnon42022/07/14 05:05 PM
          Retbleedanon22022/07/14 05:37 PM
            Retbleedanon22022/07/14 06:40 PM
              Retbleeddmcq2022/07/15 04:54 AM
                Retbleedanon22022/07/17 07:17 AM
              RetbleedMichael S2022/07/15 07:08 AM
                RetbleedBen T2022/07/16 05:06 AM
                  RetbleedMichael S2022/07/16 11:41 AM
                    Public cloud infrastructureBen T2022/07/16 04:50 PM
                      Public cloud infrastructureRayla2022/07/16 09:15 PM
                      Public cloud infrastructureme2022/07/17 09:19 AM
                      Public cloud infrastructureBrett2022/07/18 12:38 PM
                        Public cloud infrastructureAdrian2022/07/18 01:19 PM
                          Public cloud infrastructureme2022/07/18 03:54 PM
                          Public cloud infrastructureBrett2022/07/20 03:35 PM
                            Public cloud infrastructureBrett2022/07/21 01:18 PM
                              Public cloud infrastructureinthestratosphere2022/07/21 02:46 PM
                                Public cloud infrastructureBrett2022/07/21 10:38 PM
                                What’s needed for a viable Apple server?Ben T2022/07/22 05:31 AM
                                  What’s needed for a viable Apple server?Michael S2022/07/22 09:09 AM
                                  More DRAM capacity?Mark Roulo2022/07/22 09:48 AM
                                    More DRAM capacity?Doug S2022/07/22 11:05 AM
                                      More DRAM capacity?Mark Roulo2022/07/22 11:20 AM
                                        More DRAM capacity?Doug S2022/07/22 01:48 PM
                                    More DRAM capacity?Wes Felter2022/07/22 04:49 PM
                        Public cloud infrastructureanon22022/07/18 04:25 PM
                      Putting 12 processor packages in a 1U serverBen T2022/07/22 10:02 PM
                        Putting 12 processor packages in a 1U serverrwessel2022/07/23 07:15 AM
                        Putting 12 processor packages in a 1U serverDaniel B2022/07/23 04:15 PM
                          Putting 12 processor packages in a 1U serverBen T2022/07/24 05:29 AM
                            Multi-system cluster design spacePaul A. Clayton2022/07/24 08:49 AM
            RetbleedAnon42022/07/15 03:00 AM
          RetbleedMichael S2022/07/15 06:59 AM
      Retbleed---2022/07/15 11:14 AM
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