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Larry Seabrook

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Joined: 12 Sep 2014
Posts: 2
Location: USA

PostPosted: Wed Nov 12, 2014 12:37 am
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Hello,

How widely is IMS DC in-use today?

Thanks in advance.

Larry
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PeterHolland

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Joined: 27 Oct 2009
Posts: 2481
Location: Netherlands, Amstelveen

PostPosted: Wed Nov 12, 2014 1:44 pm
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Use [URL] BBCode for External Links

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steve-myers

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Joined: 30 Nov 2013
Posts: 917
Location: The Universe

PostPosted: Wed Nov 12, 2014 4:49 pm
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Note the terminology. From Mr. Holland's reference (fair use extract) -
Quote:
IBM calls IMS it's premier MVS/ESA and OS/390 transaction manager and it's premier hierarchical database manager. ...
It would appear this quote dates from the middle 1990s - perhaps a little earlier. In other words, 20 years ago.
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Gary Jacek

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Joined: 17 Dec 2007
Posts: 64
Location: Victoria, BC, Canada

PostPosted: Thu Nov 13, 2014 5:40 am
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Well, there are two ways to measure this.

1. Last I heard, there were about 7,000 IMS licenses worldwide.

2. Go to any shopping mall, bank, airport. It is a safe bet that the vast majority of credit card/bank card transactions taking place will involve a backend IMS system to do the heavy lifting.

Now consider how much commerce takes place worldwide with that paltry number of IMS licenses and the relative handful of IMS administrators that make it all happen.

Amazing, isn't it? icon_biggrin.gif
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Gary Jacek

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Joined: 17 Dec 2007
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Location: Victoria, BC, Canada

PostPosted: Thu Nov 13, 2014 11:12 pm
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IMS claims to process more than 50 billion transactions per day.



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don.leahy

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Joined: 06 Jul 2010
Posts: 765
Location: Whitby, ON, Canada

PostPosted: Sat Nov 15, 2014 1:53 am
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A recent benchmark produced by IBM showed that IMS/DC (aka IMS/TM) can handle over 100,000 transactions per second.



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Gary Jacek

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Joined: 17 Dec 2007
Posts: 64
Location: Victoria, BC, Canada

PostPosted: Sat Nov 15, 2014 2:37 am
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Yes, that benchmark used 20% of IBMs largest zEC12 processor, which is about the size of your kitchen refrigerator. ONE machine. Not a giant room filled with networked servers.
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