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IMS DC (Online)

 
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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    Post subject: IMS DC (Online)
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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: 2422
Location: Netherlands, Amstelveen

PostPosted: Wed Nov 12, 2014 1:44 pm    Post subject:
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www.oocities.org/obul_m/imsdc.pdf

page 9, 10
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steve-myers

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Joined: 30 Nov 2013
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Location: The Universe

PostPosted: Wed Nov 12, 2014 4:49 pm    Post subject:
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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
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Location: Victoria, BC, Canada

PostPosted: Thu Nov 13, 2014 5:40 am    Post subject:
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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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PostPosted: Thu Nov 13, 2014 11:12 pm    Post subject:
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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: 641
Location: Whitby, ON, Canada

PostPosted: Sat Nov 15, 2014 1:53 am    Post subject:
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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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Location: Victoria, BC, Canada

PostPosted: Sat Nov 15, 2014 2:37 am    Post subject:
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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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