Rexx, Sort, Fields, Icetool, Messages, Techniques, Smf

setting up AFP resources (continued)	SNA Network Interconnection (SNI) 189
migrating print applications (continued)	SNAP macro 279
OS/390 dynamic allocation & output descriptor	softcopy books	412
macros 242	softcopy library	412
PL/I 242	software configuration library manager (SCLM) 391,

printing from TSO			241			440
REXX	242					software partitioning				423
VSE printer PARM macro					241	Software Project Office				539
migrating resources from VSE to OS/390						SoftwareXcel SystemPac/MVS 406
defining resources				240		SORT
migration without the source 240						control statements				377
remote-resident resources					240	DFSORT/VSE control statements 379
transferring print streams					241	DFSORT/VSE migration considerations 379
setup JES2 resources			209			FIELDS	341
shared						ICETOOL	380
application code		50				JCL statements			375
DASD 404, 425						MESSAGES		341
DASD between OS/390 test systems 432						multiple data sets				132
DASD between VSE and OS/390 (vs. cloned						programming support					131
DASD)	433					suicide	131
DASD vs. cloned DASD				432		TECHNIQUES		342
volume ownership			120			VSAM considerations					131
shareoptions	125					source code modifications					231
SHAREOPTIONS (X 3)			130			source program inventory					14
SHAREOPTIONS (X 4)			130			space classes		125
SHOWCB macro 292						space management			100
shutdown statistics		137				SPIE STAE	338
SIE 405						spool

single	CPU cross-region sharing	126	CICS interface 151
single	region data set sharing	128	interface restrictions 151
single switchover 28			interfaces 221
SIS option (Sequential Insert Strategy) 340			interfaces - other	222
SISIPT data 73			space allocation	221

SISRO - CORTEX-Migration System			volumes JES2		210
(CORTEX-MS)	524		spooling	73
sizing migration effort		18	SPUFI	179
areas of VSE & OS/390 differences			SQL/DS to DB2
batch & online program conversion 14			descriptions of users
files 15			application developers			179
Job Control Language 15			database administrators (DBAS) 180
operations	16		end users		178
source program inventory 14			security administrators			181
source programs		14	system administrators			180
basic VSE vs. OS/390 functions & components 16			ISQL and SPUFI 179
introduction	13		other comparison areas

project objectives definition				13	data replication and data access				182
sliding window definition			579		DRDA considerations		182
SLIP	475				other product areas		182
SMESSAGE or LMESSAGE			337		transaction management			182
SMF	22, 395				year 2000	181
SMP/E	23				summary of migration Task			182
SMP/E zone maintenance			431		SQL/DS to DB2 for OS/390 migration				178
SMPO (Software Project Office)				539	SRM 22
SNA					STACKER 339
attached printers 236					staff availability	12
migration		485			staffing strategies	29
network		191			stand-alone Fast Copy 397
remote workstation definition				229

Index 615

OS/390 specifications

IBM OS/390, a versatile operating system, was a cornerstone in enterprise environments and played a pivotal role in mainframe computing. Released in the mid-1990s, OS/390 combined the strengths of IBM's MVS (Multiple Virtual Storage) with new features and enhancements, targeting scalability, reliability, and performance in demanding business applications.

One of the key features of OS/390 was its robust support for multiple users and processes. The system allowed thousands of concurrent users to access applications and data, ensuring high availability and minimizing downtime—a critical requirement for many large organizations. This scalability was supported through various enhancements in memory management and processor scheduling, enabling optimal resource allocation across diverse workloads.

OS/390 was known for its superior workload management capabilities. The Workload Manager (WLM) component allowed administrators to define service policies, specifying how system resources would be allocated according to the priority of tasks. This ensured that critical business processes received the necessary resources while less critical tasks were managed more flexibly.

Another significant characteristic of OS/390 was its commitment to security. The operating system provided comprehensive security features, including user authentication, data encryption, and auditing capabilities. This focus on security was vital for organizations handling sensitive data, ensuring compliance with regulations and safeguarding against unauthorized access.

OS/390 also supported advanced technologies that facilitated integration and development. The system included features like the IBM CICS (Customer Information Control System) for transaction processing and IMS (Information Management System) for database management. These technologies allowed organizations to build robust, high-performance applications tailored to specific business needs.

The ease of network integration was another strength of OS/390. With the advent of the Internet and global connectivity, OS/390 systems could easily interface with various network protocols, enabling businesses to operate in a connected world. This inclusion paved the way for many organizations to expand their capabilities and offer new services, driving digital transformation.

In conclusion, IBM OS/390 represented a significant advancement in mainframe technology, combining scalability, security, and robust workload management. Its rich feature set and support for critical enterprise applications solidified its role as a vital component of many organizations' IT infrastructures, ensuring they could meet their operational challenges head-on while supporting future growth. As technology continues to evolve, the legacy of OS/390 remains influential in the realm of computing.

IBM OS/390 Rexx, Sort, Fields, Icetool, Messages, Techniques, Shareoptions X, Spufi, Slip, Smf

Models: OS/390

REXX

SORT

FIELDS

ICETOOL

MESSAGES

TECHNIQUES

SHAREOPTIONS (X 3)

(CORTEX-MS)

SPUFI

Job Control Language 15

SLIP

SMF

SMP/E

SNA

STACKER 339

Index 615

OS/390 specifications