Cisco Systems S/390 manual Exit Work Area

Page 11

Cisco IOS for S/390 Planning Guide

Exit Work Area

If requested, the exit facility provides a work area to the exit program upon each invocation, except the INIT exit point. Request the work area with the EWALENGTH parameter of the EXIT statement in member IJTCFGxx, or with a parameter returned by the program at the INIT exit point (the program parameter taking precedence).

The Exit Work Area (EWA) addressed will be passed to the exit program at each exit point as the fifth parameter, following the address of the message-writing routine.

Note The parameter lists for all exit points must be updated.

The EWA size can be from 1 to 65532 bytes. It is taken from pooled storage; the smallest pool that will satisfy the requested size will be used. Pool usage can be monitored via the IFS POOL command. One of the following pools will be used:

Table 3

EWA Pools

 

 

Pool Name

EWA Size

 

 

256B

1-252

 

 

512B

253-508

 

 

01KB

509-1020

 

 

04KB

1021-4092

 

 

08KB

4093-8188

 

 

16KB

8189-65532

 

 

Note These figures are provided to allow the exit program designer to make efficient use of the EWA buffers. It is important that the exit use only the size requested on the EWALENGTH parameter, or by the INIT exit. The exit facility monitors the exit program's use of the EWA, and will force an ABEND if an overrun is detected, even if space remains in the buffer.

Add the following parameters to the INIT exit parameter list, following the subsystem ID address:

Table 4

INIT Exit Parameters

 

 

 

 

 

Parameter

Data

 

Offset

Length

Length

Description

 

 

 

 

32

04

04

The address of the four-byte Cisco IOS for S/390 subsystem ID.

 

 

 

 

36

04

04

The address of a fullword area in which the exit program may put the

 

 

 

size of the EWA to be obtained.

 

 

 

 

40

04

04

The address of a fullword area in which the exit program may put the

 

 

 

address of a recovery routine to be called in the event the exit program

 

 

 

ABENDs at a subsequent entry point.

 

 

 

 

Cisco IOS for S/390 Release 2.0 Release Notes 11

Page 10 Page 12
Image 11
Page 10 Page 12
Contents Cisco IOS for S/390 Release 2.0 Release Notes Improved Management Enhanced FeaturesEnhanced Features Improved Performance and EfficiencyEnhanced APIs Product ChangesEnhanced APIs Other EnhancementsAcpcfg Member Changes APPCFG00 DNRCFG00 IJTCFG00 SNMCFG00 TCPCFG00Product Changes Parameter Aliases Product Changes Arcb Cbuf Epcb SRE Tpcb Tsqb TucbProduct Changes New Features New FeaturesCisco Connection Online Cisco Connection OnlineDocumentation Product Documentation Library Product Documentation LibraryCisco IOS for S/390 Planning Guide Service Startup StatementChanges to the Documentation Set Cisco IOS for S/390 Users GuideExit Work Area Register Contents on Entry Exit Recovery RoutineRecovery Exit Recovery Exit Register ContentsSyntax Description Cisco IOS for S/390 System Management GuideCustomizing CA-ACF2 Version 6 or Later Refreshing UsstabSubtype Description Parameters for the Svcdump CommandProtocol Layer Events Subtypes 110 123 Descriptions MU1IUCV Usermod CorrectionTcpeep Netif Option Netstat RTM CommandCisco IOS for S/390 Customization Guide Capture of User Data in a TLI TraceAppend TCP Mindev and RTO Defaults ChangedRecommendations on Setting TOS Append Keyword for Lupool StatementLogging Examples Logging Keywords Logically GroupedClass Dest Form Writer Lines Minutes SyncT01CF082W Cisco IOS for S/390 Prefixed MessagesT01CF080R T01CF081WCisco IOS for S/390 Unprefixed Messages and Codes ’C24C’ Instance Codes C24Cxxxx 0Exx T012TOPTDocumentation ’C245’ Instance Codes Byte code Description ’C25B’ Instance Codes C25Bxxxx 1Dxx T012TERRXC25F Instance Codes C25Fxxxx 21xx T01PSTUBC262xxxx 6Fxx T012TPLK Documentation Byte code DescriptionInstallation Requirements Installing Cisco IOS for S/390 ReleaseSAS/C Release Level Callable System Services LibraryTSO/E ACF/2MVS/ESA Release 5.1 Considerations Common Inet Sockets in OpenEditionRS6000 Vtam ReleaseHardware/Software/Microcode Compatibility Installation ProcessControl File JCL Jobcard Installation ProcessAllocate the Data Set Names for Cisco IOS for S/390 release TcpnamesInstsmpe ALLOCT00Smpecumt HolddataCustomization Guest bin Cd /pub/ptf520Modify Trace on SIZE256 Parm CustomizationInvoking Cisco IOS for S/390 Release Usermod CustomizationObtaining a Snap Dump Diagnosis and Problem ReportingDiagnosis and Problem Reporting Obtaining GTF OutputObtaining JCL Output SAS/C Usage NotesObtaining a Tcpeep Obtaining an SVC DumpSecurity Security CLASS, PROFILE, APPLNAME, Xsec Logging ACPCFG00 Host StatementLogstamp Loopbuf MVS Sysdump Loopmtu Host SSN Global APILUPARMAPPLUP00 GreetingyesnoapplLogstamp Nologstamp LUPARMACPLUP00TCP Protocol Parameters Service Telnet Appl Termprof FTP GAT Smtp LPR VtamService Telnet Appl Application Statement MappingsKeepalivegarbagenogarbage KEEPALIVETIMERnumTIB Protocoltcp TADDRUSErangesUDP UDP Protocol ParametersRAW Protocol Parameters TIB ProtocoludpNetwork Medianame Network Metric Network ParametersTIB Protocolraw Arptable Lnid LoopOffloadno Route ParametersMssoptneversubnet Netalways ChecksumhostyesFlagsgnacrcsrc Driver ConfigurationLocal Arptable ARPLniclaw ErrorabendOptionsasyncsync Dsmesm Getmainpcore Loopnoloop Docpeocp TracenotraceBUFSIZE1024204330724096 Lniclaw DEVADDRccuuDEVADDRccuu SinglenoopdoublenoopLnihypr Hypr Driver ConfigurationLnihypr Trace NameMedianame Autostart Pfilter Bcasttrunc ErrorabendArptableserver Lnilcs and LnilinkIJTCFG00 Changes Auth Logging StatementIfsparm Promptnoprompt Logging Statement Cisco IOS for S/390 Release 2.0 Release Notes

S/390 specifications

Cisco Systems S/390, also known as IBM's S/390 architecture, is a revolutionary mainframe computing solution that has significantly impacted enterprise computing since its introduction. Though primarily associated with IBM, its integration with Cisco Systems technologies has fostered enhanced networking capabilities, creating a robust platform for organizations to leverage.

One of the most notable features of the S/390 architecture is its scalability. The system is designed to manage workloads efficiently, enabling organizations to scale their operations seamlessly as their requirements grow. This architecture supports an extensive range of applications, from transaction processing to complex data analysis, making it suitable for diverse industries.

The S/390 systems are known for their reliability and resilience. With advanced error detection and correction mechanisms, the architecture minimizes downtime, ensuring that mission-critical applications remain operational. The mainframe's design accommodates redundancy and fault tolerance, reinforcing its reputation as a dependable computing solution.

Moreover, security is a core characteristic of the S/390 infrastructure. It incorporates various security features, such as encryption and robust access control mechanisms, to safeguard sensitive data against unauthorized access and cyber threats. This level of security is particularly critical for industries such as finance, healthcare, and government, where data protection is paramount.

The integration of Cisco networking technologies with the S/390 architecture brings enhanced connectivity and streamlined communication capabilities. Cisco’s advanced routing, switching, and security solutions bolster the mainframe's communication prowess, enabling organizations to create seamless, high-performance networks. This ensures that data flows efficiently between the mainframe and other networked devices.

Additionally, S/390 supports an array of middleware solutions, facilitating better interoperability with modern applications and cloud services. Organizations can take advantage of this flexibility to leverage existing investments in technology while embracing innovative solutions.

In summary, Cisco Systems S/390 embodies a potent combination of scalability, reliability, security, and advanced networking features. Its architecture serves as a cornerstone for enterprise computing, allowing organizations to meet their evolving business needs while maintaining high-performance standards. As businesses increasingly rely on data-driven decision-making, S/390 remains a critical asset for organizations striving for efficiency and innovation in their operations.
Top Page Image Contents