Statewide Internet Portal Authority (SIPA)

AGENCY 

FY 2001 2002 

FY 2002 2003 

Department of Corrections 

0 

3 

Department of Labor & Employment 

1 

1 

Colorado Legislative Council 

0 

4 

TOTAL 128 

176 

MAINFRAME CAPACITY AND UTILIZATION MANAGEMENT 

CAPACITY 

From July 2002 to April 2003, the Division of Information Technologies continued to 

manage, operate, and maintain an Amdahl Millennium 785 mainframe processor.  This 

Amdahl mainframe utilized 8 engines and provided 497 million instructions per second 

(MIPS), 1 gigabyte each of central and extended memory and 48 Enterprise Systems 

Connection (ESCON) channels and 32 parallel (132 wire copper) channels.  The system 

included 1.7 terabytes of disk space.    

In April 2003, the Amdahl was replaced with an IBM z800 Enterprise Server with 

Integrated Facility for Linux (IFL).  The IFL has nearly 100% capacity available

.  

The 

division recently purchased a new EMC disk array with 4 TB of additional capacity for 

its storage area network (SAN) and a further 1.5 TB reserved for Snap replication 

processing.  

The IBM z800 provides the equivalent processing capacity necessary and sufficient for 

our current and near future anticipated Legacy workload.  It also provides expanded 

memory capacity from 2 GB to 8 GB.  In addition, the IFL component provides the 

facility by which multiple open system servers can be aggregated into this architecture 

without acquisition of additional physical servers.  Together, the IBM z800 and the IFL 

allow us to work in compliance with the Colorado Statewide IT Plan FY 2003 2006 by 

implementing an Enterprise Server (mainframe) architecture that continues support for 

aggregated Legacy mainframe processing, while supporting aggregated open system 

processing. 

MAINFRAME UTILIZATION (Summary for fiscal year 2002 2003) 

Utilization of the mainframe continues to be measured by the number of service units 

required individually for every batch job; for example, TSO session, CICS session, 

ADABAS session, that is run on the mainframe.  A service unit, as used in the following 

text and accompanying charts, is defined as a measure of the amount of CPU resource 

required to complete a given unit of work and is derived by multiplying measured CPU 

time by a processor dependent coefficient.  These service unit values are based on the 

sum of the Service Request Block (SRB) and the Task Control Block (TCB) service unit 

count. The System Management Facility (SMF) program captures the service units 

consumed, aggregates this information over a period of time, and sends the output to the 

Request for Proposal 10/29/2004 

49