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Meet the Mainframe – Meet My Mainframe

Meet the Mainframe – Meet My Mainframe


Hi, I’m Esmeralda Quintana I’m a z/OS performance
analyst here at the Poughkeepsie site. I just want to show you one of the machines I work
on, so come come. This is a z14, double-wide. So I could probably live in this thing. At
a glance, we’ll get into it, but this is power, we have behind this, I/O. More power with
the SE up there, I/O and our processors. So we’ll move the SE out of the way. Up here this is our power supply. We have
two batteries up here. Something to know about the batteries is, you know, they’re kind of
small, they do a very specific job. If power goes out, we want to make sure that
we complete transactions in flight, right? Because data integrity is incredibly important
to us… and you, hopefully. Alright, so over here you see this nest of
I/O? These are all PCIe I/O cards. You can see that we have a ton. We have even more
on the back, there’s some over there too. And if you just look at the rat’s nest that
goes down and is fed into the bottom, that’s because we’ve got OSA, FICON, we even have
zEDC for data compression. A lot of cards here doing a lot of jobs, moving a lot of
data. Now this side. As I promised even more I/O cards, like I
said, more on the back. We’ve got another battery pack over here. And up here is the
SE. Now, if you look, we talk about all of this
I/O, right? Come here. We have a switch for the internal network,
we have that much activity going on that we need this. It’s incredibly complex. And while you’re looking take a peep at
this thing, okay? This is the lightbar. Say you’re working on the frame and you notice
an I/O card is going down, or maybe you just want to upgrade one. Maybe you have a problem
child CP. But you’re working remote what you gonna do? You can actually talk to the SE and light
this up. This will actually point an on-site technician in the right direction. This will
route them to the specific location, now real quick. Oh, come here, it’s right here. There’s a light bar for PCIe cards as well. So that allows you to just very easily communicate
where your technician needs to go. Now, I mentioned the SE, the SE does a lot
more than blinking lights. So, an airplane, right? You ever see the cockpit?
It’s full of knobs, bells and whistles everywhere. That’s what the SE is at a glance.
So you think about this huge frame, you can tell it’s complex. You see these wires,
you see the amount of processor drawers. What the SE does, it’s the buttons and knobs
of the airplane, right? So let’s just think about an LPAR. What
do you need to set up for an LPAR? Number of processors. Are they shared or dedicated? How much storage? I mean, certainly you would have the real
estate for that amount of buttons necessary. I mean, this thing is huge, I could live in
it, but you don’t want to deal with all those buttons. The SE allows you that level in both a GUI tool called the HMC as well as a command line
interface. So right here, we have two of them, right?
Just like two pilots on an airplane. Redundancy is incredibly important.
The two SE servers are up here. So you know, if you had one and you lost it,
you’re going to land that plane blindly. So redundancy is important. That’s the SE.
Very good. Ok, so here’s our processors.
We have four drawers, right? 1-2-3-4. Each drawer itself has tubes of coolant pushing
in cold water, taking out hot The coolant is being piped down here, it’s
hitting the radiator, it’s cooling, warm air flowing out the back, which I think I’ll
show you. So let’s do some quick math.
Each one of these drawers had five chips. Don’t be confused, each chip has 7 to 10
cores, so let’s take the lowball of processors available.
5 x 7 x 4 that’s 140 processors. 140.
That’s a lot. So now I’ll show you the back so you can
see how this thing is cooled. This is an absolute windtunnel
This is a nice summer breeze This is behind the processors. They’re all
getting cooled and this air is coming out hot, so she is working very hard.
And as I promised, more I/O over here, battery pack.
I’m going to try to close this. Real quick, so you know I wasn’t lying,
even more I/O cards on the back. She’s nice and warm, actually.
And that’s the back of our power supply And look at the nest too, remember the other
side, we have just as many over here. So where are those wires going? We have network
but we also have storage. This is the back of one of our storage units.
You can see just as many wires. Not as interesting from the back.
You can see the complexity of the network that’s hooked into this.
This machine is not just hooked online, but it is hooked to many of the friends we have
on-site. And this is the front of our hybrid storage
Now, it looks pretty, right? Look here.
Every one of these storage areas is full Full of what?
Each one of these slots has… about 2 TB of storage
I’m not even going to try and do quick math and add that up.
So we have so many of these, look at these guys over here
If you look closely, you can see these are all Flash. Solid State.
So we have tons of storage going in and out of this.
These guys are incredibly fast, working on fast networks with those fast PCIe cards
And since this is hooked up to so many things on-site, remember the SE? We had a computer
for our computer? We did it again. Right here, this guy controls the storage,
like the data. Every machine that hooks up to this doesn’t
want to worry about what everybody else is doing
This guy handles your data integrity for you at a very very good performance, which is
really incredibly important when you’re dealing with spinny disk storage. So yeah
Backing up, I don’t know if you want to take a glace at the machine we have here
We have a lot Just like the z14, we’ve got like 20 in
the back And that’s just one floor of one building
here at the Poughkeepsie labs So a lot of work being done at any moment,
a lot of machine turned on, a lot of warm air being blown out back.
So Thank You, I hope this inspires you to learn a lot more about the mainframe
You can see they’re incredibly complex, and have fun with it.

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