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3 Argentum

what is the basic Difference between open system and mainframe ?

what is the basic Difference between open system and mainframe ?

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11 Replies
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3 Zinc

Re: what is the basic Difference between open system and mainframe ?

Here are a few key differences:

- DISK format / geometry is different. Open uses FBA (Fixed Block Architecture), MF uses CKD (Count Key Data)

- Connection between processor and storage... Open uses Fibre Channel/SCSI etc (SCSI commands). MF uses ESCON/FICON (PSW's - Program Status Words)

- Character sets... Open uses ASCII, MF uses EBCDIC.

- User interface is quite different.

- Mainframe is IBM proprietary.

- In Mainframe you always type in UPPER CASE

- Mainframe admins:

--- Will (in general) have less hair than open guys

--- Will (in general) larger tummies than open guys

--- Will not drink out of a cup with /dev/mug printed on it.

--- May have plastic blow-up dinosaur sitting somewhere on their desk.

OK, my tongue is planted in my cheek on those last points... I'm allowed coz I'm a mainframe guy 🙂

There are lots of difference really... What specifically are you wanting to know?

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6 Indium

Re: what is the basic Difference between open system and mainframe ?

Hahahaha, I especially like the /dev/mug ! Can I order that one anywhere ??

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Re: what is the basic Difference between open system and mainframe ?

Google search to the rescue:

http://www.cafepress.com/+dev+mugs

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Re: what is the basic Difference between open system and mainframe ?

You also forgot that most mainframers are near retirement.

Open systems people have no idea what channel end device end means.

RRR -- if you find a mug send me the URL so I can order one too please.

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7 Thorium

Re: what is the basic Difference between open system and mainframe ?

i don't know about all that, banking, healthcare ..still live and kicking and not going anywhere.

RobertDudley wrote:

You also forgot that most mainframers are near retirement.

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Re: what is the basic Difference between open system and mainframe ?

dynamox not the hardware the people - mainframer = person who is mainframe centric.

And i agree the mainframe itself isnt going anywhere anytime soon; they are too big and heavy.

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7 Thorium

Re: what is the basic Difference between open system and mainframe ?

ahh ..so true, it might be the next hot skill to have

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6 Indium

Re: what is the basic Difference between open system and mainframe ?

the ability to lift these dynosaurs out of the data center ?

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7 Thorium

Re: what is the basic Difference between open system and mainframe ?

RRR wrote:

the ability to lift these dynosaurs out of the data center ?

what are you talking about ? Our mainframe is sexy and agile . I bet you can't say the same thing about your HPUX box that keeps droppig paths. hehe

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