P owerful computers supporting thousands of applications inputoutput devices and supporting thousands of users simultaneously Mainframe Workloads Batch Processing a running mainframe process that ID: 691426
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Slide1
MainframesSlide2
What is Mainframe?
P
owerful computers supporting thousands of applications, input/output devices and supporting thousands of users simultaneously.Slide3
Mainframe Workloads
Batch Processing:
a running mainframe process that
does not
need user interactionOnline Transaction Processing (OLTP): a running transaction process that occurs
interactively with the end user Slide4
Mainframe Operating systems
z/OS
z/VM
z/VSE
Linux for zSeriesz/TPF
Mainframes can run multiple combinations of operating system in the same platform.
P
opular mainframes operating system include Slide5
Who uses mainframes?
• Most Fortune 5
00
companies use a mainframe
environment.
• 60% of all data available on the Internet is stored on
mainframe computers.Slide6
Why mainframes?
Large-scale
transaction
processing.
Thousands of transactions per secondSupport thousands of users and application programs.Simultaneously accessing resources.Terabytes
of information in databases.Slide7
Factors contributing to mainframe use
RAS
--
reliability, availability, serviceability
Security
ScalabilityCentralized
control
Workload management
Partitioning / virtualization
Continuing compatibility
Evolving architecture
Application enablement, complexity, variety
Potential for thousands of usersSlide8
Advantages
Concurrent users
High Processing Speed
Storage
MultiprogrammingMultiprocessingSecurityReliableBatch ProcessingSlide9
Domains
Banking
Finance
Insurance
Market Research (Retail)TelecomSlide10
So far
Mainframes is a
very stable
environment
It has been there in the Software Industry for more than 40 yearsNo new technology can totally replace Mainframes because of its architecture and efficiencySlide11
Current trend
Around
80
% of Mainframes projects are
maintenance projectsOnly 20% or less are development projectsThe reason being the cost factor. The hardware maintenance cost and the initial investment required is too high.Slide12
Current trend
Migration projects are the current
trend
in the
market.Reasons: Maintenance cost Slide13Slide14
Future
A survey to determine the current demand for mainframes found that more than half of the
respondents still
have major applications running on
mainframes.Slide15
Done by Zahra FarhoodSlide16
Done by Zahra FarhoodSlide17
Done by Zahra FarhoodSlide18
References
Wikipedia.(2010, April 28).
Mainframe computer
[Online]. Available: http://en.wikipedia.org/wiki/Mainframe_computer
Mike Ebbers, Bill Ogden and Wayne O’Brien, “Introduction to the New Mainframe: z/OS Basics,” International Technical Support Organization, Vol.1, pp.5–710, July 2006.IBM Systems Software Information Center. z/VM Center concepts [Online].
Available:http://publib.boulder.ibm.com/infocenter/
eserver
/v1r2/
index.jsp?topic
=/
diricinfo
/vsd0_c_zvm.html
Mike
Ebbers
, Wolfgang Bosch, Hans Joachim Ebert, Helmut Hellner, Jerry Johnston, Wilhelm Mild
et.al.,“Introduction to the New Mainframe: z/VSE Basics,” International Technical Support Organization, Vol.1, pp.5–460, March 2007.IBM TPF Product Information Center. Introduction to the z/TPF system
[Online].Available:http://publib.boulder.ibm.com/infocenter/tpfhelp/current/
index.jsp?topic
=/
com.ibm.ztpfztpfdf.doc_put.cur
/gtpc3/c3sysov.html
IBM, “z/Architecture Principles of Operation,”
International Technical Support Organization
, Vol.7, pp.20–1100, February 2008.Slide19
References
Competition in mainframe and associated services in
I
ndia
.