615 passengers on a few planes. https://en.m.wikipedia.org/wiki/Seat_configurations_of_Airbus_A380
On Wed, Aug 2, 2023, 13:26 P H < 000004843e86df79-dmarc-requ...@listserv.ua.edu> wrote: > The numbers quoted by Tom: > > So I pointed out there's only 12 I/O drawers max on a z16 which is 12 x > 16 = 192 slots or 384 ports max. He replied, but didn't seem to fully > accept that answer. > > are 100% correct. These numbers are the MAXIMUM. Depending on the > configuration, these could be a lot less e.g. the number of coupling links > could reduce the numbers. If z16 is ordered with BPA power supplies, the > MAX I/O drawers go down from 12 to 10. > > I have already mentioned things like cache, memory, I/O Subsystem, on chip > data compression/Crypto (z has been a leader for this)/Sort/AI capabilities. > > Talking about the I/O Subsystem, this is a key strength when it comes to > handling large number of I/Os. Unlike x86, the I/O Subsystem handles this > very well and lets the CP get on with what it's mean to do. What no one has > mentioned is the 'processing' power of z. In addition to the main CPs (up > to 200 for z16 Models A01 and L01), the I/O Subsystem has up eo 192 POWER > processors. These are in a N+1 config making a total of 384 in he > sub-system alone. > > Impressive numbers. What do all these prove? Taken out of context, these > are meaningless. As I stated previously, one has to consisder the whole > system. This is where z has strengths. It has a 'balanced system design'. > This morning I decided to do a full virus scan on my 2 year old latop with > an Intel i5 chip. While the scan was running, I couldn't even open a 10 MB > Powerpoint presentation 🙁 (before the smartones give me their 2 cents > worth, I know I could have run the scan as a background task). > > Talking about numbers, the Airbus A380 plane has been designed to have up > to 840 passengers. Are there any airlines with A380s which carry such > numbers! > > Horses for courses!! > > ________________________________ > From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on behalf > of Tom Brennan <t...@tombrennansoftware.com> > Sent: 02 August 2023 17:34 > To: IBM-MAIN@LISTSERV.UA.EDU <IBM-MAIN@LISTSERV.UA.EDU> > Subject: Re: Channelized I/O WAS: Mainframe Makers.... WAS: Ars Technica: > The IBM mainframe: How it runs and why it survives > > > I’ve missed this thread. > > He first said 1536 ports (not slots, not lanes) on a full z16. I asked > where he got that number. Response was there are 12 fanout slots on a > CEC drawer (true), so with 4 CEC drawers that's 48 fanout slots (true) > which means the 4 CEC drawers could address 48 I/O drawers with 16 cards > each and 2 ports per card = 1536 ports. > > So I pointed out there's only 12 I/O drawers max on a z16 which is 12 x > 16 = 192 slots or 384 ports max. He replied, but didn't seem to fully > accept that answer. > > Later he said there are 1600 slots (not ports, not lanes) on a z16 so I > asked where he got that new number. He said he meant 1536 slots (not > ports, not lanes) so the number doubled from last time. I replied same > as I did previously. > > Below, he said 1536 slots again. 1536 cards on a single z16 could be > over 3000 cables! I've had to untangle some 150+ cable rats nests, but > for that one I'd just say, Naw... I'm going home :) > > On 8/2/2023 1:53 AM, David Crayford wrote: > >> On 2 Aug 2023, at 12:15 pm, Tom Brennan <t...@tombrennansoftware.com> > wrote: > >> > >>> The IBM z16 can have up to 1,536 PCIe+ slots > >> > >> I'm gonna quit explaining this and just say, "WRONG" every time you say > this as if it's a fact :) > > > > I’ve missed this thread. By 1,536 PCIe slots, that’s slots not lanes > right? Even if it were lanes that would be a ludicrous suggestions! That’s > so far fetched it’s laughable. The Redbook [1] is quite clear about I/O > configurations. What I find interesting is that the z16 seems to use PCIe > gen 3 and not gen 4 which doubles the transfer rate per lane. There must be > a good technical reason for this. > > > > [1] https://www.redbooks.ibm.com/redbooks/pdfs/sg248951.pdf > > > >> > >> On 8/1/2023 8:01 PM, Jon Perryman wrote: > >>> > On Tuesday, August 1, 2023 at 05:20:33 PM PDT, David Crayford < > dcrayf...@gmail.com> wrote: > >>>> What’s the difference between between channelized I/O and a rack of > >>>> x86 servers connected to a SAN using fibre channel driven by high > speed HBAs? > >>> PCIe was created specifically for PCs and IBM z16 chose to use that as > their only channel technology. Channelized I/O for PC has been available > for several decades and is not limited to PCIe. The IBM z16 can have up to > 1,536 PCIe+ slots. > >>> As for x86 fiber channel connection to a PC, PCIe is only one > possibility. > >>> ---------------------------------------------------------------------- > >>> For IBM-MAIN subscribe / signoff / archive access instructions, > >>> send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > >> > >> ---------------------------------------------------------------------- > >> For IBM-MAIN subscribe / signoff / archive access instructions, > >> send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > > > > > > ---------------------------------------------------------------------- > > For IBM-MAIN subscribe / signoff / archive access instructions, > > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > > > > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
