Keep in mind that what IBM is discussing is throughput rather than the duration of a single I/O. A typical installation will be doing I/O to a lot of DASD volumes concurrently. When you have a lot of concurrent I/O requests on the same channel, the effect of, e.g., rotational delay, cache miss, is mostly on duration rather than on throughput.
-- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List [[email protected]] on behalf of kekronbekron [[email protected]] Sent: Wednesday, December 8, 2021 10:52 PM To: [email protected] Subject: Re: AWS is down. Hey Patrick, Please share some info about what enables this, to the extent that you can. I read in some storage blog that Infinidat for example does 30-40 mics on average. With CFs being 2-10 mics, and zHyperLink being ~20 mics, 30-40 for the average I/O seems pretty good. The 400-500 mics that you said, is that for a standard IBM/EMC storage box with zHPF? If so, with any more tune-ups, or just the above? - KB ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Thursday, December 9th, 2021 at 6:47 AM, patrickfalcone7 <[email protected]> wrote: > Don't like to get into these but I have respect for Seymour and would ask you > not to fan flames. While I understand Seymour's response he didn't > necessarily state anything but questioned the possibility.Seymour I did not > mean to put you in any unnecessary positions and apologize if I did. My post > was only to state what metrics I've seen in the last couple of years. And > you'd be surprised at how many might not know that it is possible to get mics > on average with even backleveled kits.When we did our last array upgrade we > went from 4 mills to around 400 to 500 mics. To me that is significant and > ended up being so. I saw workload shifts in time due to the significance of > the array swap.Sent from my Verizon, Samsung Galaxy smartphone > > -------- Original message --------From: Bill Johnson > [email protected] Date: 12/8/21 4:07 PM > (GMT-05:00) To: [email protected] Subject: Re: AWS is down. LOLOLOLOL, > I love when the so called “experts” are proven wrong.Sent from Yahoo Mail for > iPhoneOn Wednesday, December 8, 2021, 4:04 PM, patrickfalcone7 > [email protected] wrote:Hope you are well. FWIW > I've seem mics for sometime but mostly under favorable conditions. But lately > have found mics on average from under 5 on avg. mills.with somewhat newer > array technology on < z15 CPCs.Sent from my Verizon, Samsung Galaxy > smartphone-------- Original message --------From: Seymour J Metz > [email protected] Date: 12/8/21 9:05 AM (GMT-05:00) To: [email protected] > Subject: Re: AWS is down. On what machine do you complete I/O in a > microsecond?--Shmuel (Seymour J.) > Metzhttp://mason.gmu.edu/~smetz3________________________________________From: > IBM Mainframe Discussion List [[email protected]] on behalf of Bill > Johnson [[email protected]]Sent: Wednesday, > December 8, 2021 7:31 AMTo: [email protected]: Re: AWS is > down.I see someone who has never worked in health care where the mainframe > processes each drug prescribed and checks for drug interactions in a > microsecond. Yes, people die if the mainframe isn’t available. It’s also why > there are plenty of pharmacies open 24 hours and why hospitals have > pharmacies.Sent from Yahoo Mail for iPhoneOn Wednesday, December 8, 2021, > 1:33 AM, kekronbekron [email protected] > wrote:Critical infra in some places, sure, not everyone is denying that.At > the moment of urgent need, do people really buy something and wait for MF to > finish processing, for them to be then allowed to continue breathing?What > happened to the interim stages (logstics etc).It sounds as though failure to > buy/order something immediately is going to lead to their death... is what's > being said.Sounds pretty privileged to me.It also sounds like it's assumed > that mainframes will last 500 years, no?Did the world not exist before > 1960s?Did people automatically die before 1960s because they didn't have > MF?Are people and organizations not allowed to be wrong (to their own > detriment), etc.Are we sure that 100% of all information out there is truth, > apart from this announcement that AWS wants to replace MF?We can all like MF, > but don't need to act like it's the sole saviour of humanity.Again that means > that all technology that evolved since then is a complete waste of time and > people's efforts.Sounds pretty delusional to me... just to convey that MFs > are good servers.- KB‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐On Wednesday, December > 8th, 2021 at 10:00 AM, Bill Johnson > [email protected] wrote:> AWS had a larger & > longer outage today, than all the outages on the mainframes I’ve worked on in > the last 30 years. Much worse. Yet, some here think AWS is going to replace > the mainframe for critical applications like banking, health care, big > retail, and insurance. Plus, the mainframe has had plenty of negative posts > here in the decades I’ve been involved. Nobody dies when Netflix isn’t > available. (One of the hits from today) people can and do die if the drugs > they need aren’t available because the computer system is down.>> Sent from > Yahoo Mail for iPhone>> On Tuesday, December 7, 2021, 11:01 PM, kekronbekron > [email protected] wrote:>> Not at anybody in > particular:>> Do we have to make snide remarks because someone else had an > outage?>> Don't we remember the times when things on the mainframe itself > went south?>> Has every site's MF env. been 100% available through all these > decades?>> Is it wrong to fail sometimes?>> Is this the attitude with which > you'd like to retire, holding onto precious remarks and burning the path > behind you as you leave?>> What does that say about one's mentality and > outlook in life?>> - KB>> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐>> On Wednesday, > December 8th, 2021 at 3:54 AM, Ronald Wells > [email protected] wrote:>> > Pretty pic/web > pages make the $$ did you not get the memo> >> > -----Original Message-----> > >> > From: IBM Mainframe Discussion List [email protected] On Behalf > Of John McKown> >> > Sent: Tuesday, December 7, 2021 2:57 PM> >> > To: > [email protected]> >> > Subject: Re: AWS is down.> >> > ** EXTERNAL > EMAIL - USE CAUTION **> >> > Oh, but they advertise that they can replace > mainframe. Well, maybe the processing. But not the on site reliability. Of > course, for WFH, the internet is the week point. And, most likely, also the > home equipment. I just had to reboot my Windows PC at home because it decided > to stop talking to my internet router.> >> > On Tue, Dec 7, 2021, 12:49 Bill > Johnson < [email protected]> wrote:> >> > > > Amazon Web Services is down. I can’t get to my pictures. Glad we don’t> > >> > > > have our mainframe running there.> > >> > > For IBM-MAIN subscribe / > signoff / archive access instructions, send> > >> > > email to > [email protected] with the message: INFO IBM-MAIN> >> > For IBM-MAIN > subscribe / signoff / archive access instructions, send email to > [email protected] with the message: INFO IBM-MAIN> >> > Email > Disclaimer> >> > This E-mail contains confidential information belonging to > the sender, which may be legally privileged information. This information is > intended only for the use of the individual or entity addressed above. If you > are not the intended recipient, or an employee or agent responsible for > delivering it to the intended recipient, you are hereby notified that any > disclosure, copying, distribution, or the taking of any action in reliance on > the contents of the E-mail or attached files is strictly prohibited.> >> > > For IBM-MAIN subscribe / signoff / archive access instructions,> >> > send > email to [email protected] with the message: INFO IBM-MAIN>> For > IBM-MAIN subscribe / signoff / archive access instructions,>> send email to > [email protected] with the message: INFO IBM-MAIN>>> > ----------------------------------------------------------------------------------------------------------------------------------------->> > For IBM-MAIN subscribe / signoff / archive access instructions,>> send email > to [email protected] with the message: INFO > IBM-MAIN----------------------------------------------------------------------For > IBM-MAIN subscribe / signoff / archive access instructions,send email to > [email protected] with the message: INFO > IBM-MAIN----------------------------------------------------------------------For > IBM-MAIN subscribe / signoff / archive access instructions,send email to > [email protected] with the message: INFO > IBM-MAIN----------------------------------------------------------------------For > IBM-MAIN subscribe / signoff / archive access instructions,send email to > [email protected] with the message: INFO > IBM-MAIN----------------------------------------------------------------------For > IBM-MAIN subscribe / signoff / archive access instructions,send email to > [email protected] with the message: INFO > IBM-MAIN----------------------------------------------------------------------For > IBM-MAIN subscribe / signoff / archive access instructions,send email to > [email protected] with the message: INFO IBM-MAIN > > For IBM-MAIN subscribe / signoff / archive access instructions, > > send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
