introduction to the new mainframe © copyright ibm corp., 2006. all rights reserved. 1 main frame...
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1
Introduction to the new mainframe
© Copyright IBM Corp., 2006. All rights reserved.
Main Frame Computing
Objectives
• Explain why data resides on mainframe
60% of all data
80 % of Internet Data
• List typical uses of mainframes
• Describe the benefits of mainframe computing
• Outline the major workloads for mainframes
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Introduction to the new mainframe
© Copyright IBM Corp., 2006. All rights reserved.
Mainframe Characteristics
Centralized control of resources
HW and operating systems share disk access
A STYLE of operation -2 tier computing (logic and data on host)
Thousands of simultaneous I/O operations
Clustering technologies
Data and resource sharing capabilities
3
Introduction to the new mainframe
© Copyright IBM Corp., 2006. All rights reserved.
What is a mainframe ?
Businesses use mainframes to host:
-commercial databases,
-transaction servers, and
-applications that require a greater degree of security and availability
- growing workload from Mobile and Cloud
4
Introduction to the new mainframe
© Copyright IBM Corp., 2006. All rights reserved.
Evolving Mainframe Computer Architecture
More and faster processors... MIMD
More physical memory and greater virtual memory capability
Dynamic capabilities for upgrading HW and SW
Enhanced I/O devices and more and faster paths (channels)
Increased ability to divide resources into multiple, logically independent and isolated systems (LPAR)
Enhanced clustering technologies (e.g. Parallel Sysplex)
5
Introduction to the new mainframe
© Copyright IBM Corp., 2006. All rights reserved.
The Size/Capacity of Mainframes
A Sample Single System Configuration:
- 8 TPF (OS) Images
- Mainframe box with 12 CPUs (I-streams) and
- 32 GB of memory
- shared database of 2,500 Disks with 40 Disk control units
- 2 tape robots used primarily for logging
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Introduction to the new mainframe
© Copyright IBM Corp., 2006. All rights reserved.
The Size/Capacity of Mainframes
Some Performance numbers for that configuration:- 2 million real I/Os per second to Disk during peak hours
- over 100,000 transactions per second during peak hours.
- 3,380,000,000 (3.38 billion) transactions in 24 hours
CPU capacity complex to execute over 68 billion instructions per second (68,000 MIPS)
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Introduction to the new mainframe
© Copyright IBM Corp., 2006. All rights reserved.
Availability
An installation quote:
"It has been 4,567 days since the last customer visible outage."
It is now eight months later so the count is now
over 13 years without a customer visible outage.
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Introduction to the new mainframe
© Copyright IBM Corp., 2006. All rights reserved.
Mainframe facts
Mainframes in our midst• Hidden from the public eye – background servers
Who uses mainframes?• Most Fortune 1000 companies use a mainframe environment • 60% of all data available on the Internet is stored on mainframe
computers
Why mainframes?• Large-scale transaction processing
Thousands of transactions per second
• Support thousands of users and application programs • Simultaneously accessing • Terabytes of information in databases• Large-bandwidth communications
9
Introduction to the new mainframe
© Copyright IBM Corp., 2006. All rights reserved.
Factors contributing to mainframe use
-Capacity
-Scalability
-Integrity and Security
-Availability
-Access to large amounts of data
-Systems management
-Autonomic capabilities (dynamic self management)
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Introduction to the new mainframe
© Copyright IBM Corp., 2006. All rights reserved.
Typical batch use
Disk Storagedatabases
Tape StorageSequential
data sets
Partners and clients exchange
information
Reports
Backups
Data update
Reports
Statistics, summaries, exceptions
ResidenceMain office
Branch offices
Account balances bills, etc
Processingreports
MainframeProcessing batch jobs
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Reports
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CREDIT CARD
1234 5678 90121234 5678 9012VALID FROM GOOD THRU
XX/XX/XX XX/XX/XX
PAUL FISCHER
XX/XX/XX XX/XX/XX
PAUL FISCHER
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99
SystemOperator
ProductionControl
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Introduction to the new mainframe
© Copyright IBM Corp., 2006. All rights reserved.
Typical online use
Disk storage
controllerStores
database files
queries and
updates
Account activities
Officeautomation
systems
MainframeAccessesdatabase
Requests
ATMs
Branchoffices
Business analysts Inventory control
Branch office automation systems
Network (e.g. TCP/IP or SNA)
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Central office
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Introduction to the new mainframe
© Copyright IBM Corp., 2006. All rights reserved.
Summary
The New Mainframe:• Plays a central role in the daily operations of the world’s largest
organizations • Is known for its reliability, security, and enormous processing
capabilities. • Is designed for processing large scale workloads,
with thousands of users, and concurrent transactions • Is managed by highly skilled technical support staff.• Runs a variety of operating systems.
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