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Difference between Z/OS, OS/390, and AS/400


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Madhu Kashyap

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Joined: 19 Jan 2006
Posts: 19

PostPosted: Wed Jan 25, 2006 10:58 am
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What's the difference between Z/OS, OS/390, and AS/400?
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sripallu

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Joined: 11 May 2005
Posts: 12
Location: India

PostPosted: Wed Jan 25, 2006 1:59 pm
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Hi madhu,
z/os and os/390 are both like versions of operating system in Mainframe
and coming to AS/400(Application System 400) it can be said as sister consignee for MAINFRAME machine..
check these link for some more details

en.wikipedia.org/wiki/AS/400

Hope this helps :-)
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superk

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Joined: 26 Apr 2004
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Location: Raleigh, NC, USA

PostPosted: Wed Jan 25, 2006 7:47 pm
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z/OS supports the 64-bit real storage which will improve performance, throughput, and scalability characteristics. 64-bit storage support (z/Architecture) eliminates expanded storage and reduces or eliminates paging, and it also allows the consolidation of LPARs, reducing system overhead.

Enhancements to the Intelligent Resource Director (IRD) and the Workload Manager (WLM). The Intelligent Resource Director provides a new, dynamic facility for managing CPU consumption, Channel Paths, and Channel Subsystem Priorities across multiple system images (LPARs), based on workload priorities. Workload Manager is extended to work across LPARs, and has had a number of self-optimizing advances in workload management.

Check these links to see What's new in z/OS

z/OS V1R2.0
www-03.ibm.com/servers/eserver/zseries/zos/overview/zosnew12.html

z/OS V1R3.0
www-03.ibm.com/servers/eserver/zseries/zos/overview/zosnew13.html

z/OS V1R4.0
www-03.ibm.com/servers/eserver/zseries/zos/overview/zosnew14.html

z/OS V1R5.0
www-03.ibm.com/servers/eserver/zseries/zos/overview/zosnew15.html

z/OS V1R6.0
www-03.ibm.com/servers/eserver/zseries/zos/overview/zosnew16.html

z/OS V1R7.0
www-03.ibm.com/servers/eserver/zseries/zos/overview/zosnew.html
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superk

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Joined: 26 Apr 2004
Posts: 4650
Location: Raleigh, NC, USA

PostPosted: Wed Jan 25, 2006 7:51 pm
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Also, this Guide To The Mainframe might be helpful.
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